Fourth Year - WHATEVER YOU DO - DO NOT DELETE THIS FOLDER OKAY Flashcards
1
Q
When did Canada’s system for model code development and maintenance begin?
A
In the 1930’s.
2
Q
Who decides the content of model codes?
A
The volunteer members.
3
Q
What are the building codes in Canada generally concerned with?
A
Fire safety.
Health[][][][]
Structural sufficiency.
4
Q
Which code may contain retroactive requirements?
A
Fire codes.
5
Q
When does a standard become enforceable?
A
By referencing a standard in a code.
6
Q
Name five standard-writing organizations.
A
BNQ.
CGA.
CGSB.
CS[][][]]
ULC[][]
7
Q
Which two Canadian cities have jurisdiction over construction?
A
Montreal.
Vancouver.
8
Q
How long before the end of a code cycle must a standing committee recieve a proposed change for it to be considered for that code cycle?
A
At least two years before the end of the cycle.
9
Q
When is a task group established?
A
When a proposal is complex and requires significant analysis.
10
Q
What options are available to a standing committee regarding a proposed change?
A
Amend a warding.
Approve a proposal.
Defer the proposal for more information or research.
Reject a proposal[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
11
Q
How long is a code cycle?
A
Five years.
12
Q
How long is the public comment period?
A
Three months.
13
Q
When does a proposed change move forward?
A
After all comments are satisfactorily resolved.
14
Q
How are the National Model Code documents developed and maintained?
A
Through a broad-based consensus process.
15
Q
The National Plumbing is part __ of the National Building Code.
A
7.
16
Q
What plumbing code is the model that the provinces and territories used to develop their plumbing codes?
A
National Plumbing Code.
17
Q
Codes are developed in Canada to provide minimum safety requirements to ensure:
A
The health and safety of our citizens.
18
Q
What are some of the other codes you may be required to follow?
A
Boiler Pressure Vessel Code.
Natural Gas and Propane Installation Code.
Pressure Vessel Code[][][][][][][][][][][][][][][][][][][][]
NFPA 13[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
NFPA 13D[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
NFPA 13R[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
19
Q
How many Standing Committees are there under the CCBFC?
A
7.
20
Q
Give a brief description of the main function of each of the following:
CGA.
CSA.
ULC.
A
CGA is an organization that tests and certifies appliances, equipment, components, and accessories to an applicable standard as well as develop standards and codes.
CSA is an organization that tests and certifies appliances, equipment, components, and accessories to an applicable standard as well as develop standards and codes.
ULC is an organization that tests and certifies appliances, equipment, components, and accessories to an applicable standard as well as develop standards.
21
Q
What is the annual cost of fire in Canada?
A
$11 billion.
22
Q
What is one of the primary objectives of the National Building Code?
A
To provide a minimum level of fire safety for building occupants.
23
Q
When was the NFPA first organized?
A
1896.
24
Q
The NFPA 13 is the standard for the ________________________.
A
Installation of sprinkler systems.
25
Where is the Canadian NFPA regional office located?
Ottawa.
26
What is the abbreviation for the Canadian Standards Association?
CSA.
27
What is the abbreviation for the American Society of Mechanical Engineers?
ASME.
28
What is the abbreviation for the American National Standards Institute?
ANSI.
29
Metals are made with varying proportions of alloy to:
A. Modify their characteristics.
B. Make them malleable[][][][][]]
C. Make them rigid[][][][][][][][][][]]
D. Lower production costs[][][]]
A. Modify their characteristics.
30
Brass piping is suitable for some drainage systems because it is:
A. Resistant to oxidation and corrosion.
B. Soft and ductile[][][][][][][][][][][][][][][][][][][]
C. Durable and versatile[][][][][][][][][][][][][][]
D. Resistant to electrolysis[][][][][][][][][][][][]
A. Resistant to oxidation and corrosion.
31
The piping with smooth interior walls which makes it very efficient for water supply is:
A. Copper.
B. Steel[][][]
C. Polyethylene.
D. Polyvinyl chloride (PVC).
A. Copper.
32
The piping which is resistent to chemical reactions and cannot be solvent welded is:
A. Chlorinated polyvinyl chloride (CPVC).
B. Polypropylene (PP)[][][][][][][][][][][][][][][][][]]
C. Acrylonitrile-butadiene-styrene (ABS)[]
D. Polyvinyl chloride (PVC)[][][][][][][][][][][][][]
B. Polypropylene (PP).
33
Duriron is an alloy of iron and sillica used in industrial applications that require:
A. High temperature resistence.
B. Acid resistence[][][][][][][][][][][][]]
C. Low temperature resistence[]]
D. High coefficient of expansion.
B. Acid resistence.
34
The piping which is resistent to corrosion and high temperature is:
A. Cast iron.
B. Carbon steel.
C. Stainless steel.
D. Ductile iron[][][]
C. Stainless steel.
35
Lead piping cannot be used for water systems because it may:
A. Burst under pressure.
B. Leak at elbows and valves.
C. Contaminate water[][][][][][][]]
D. Corrode quickly[][][][][][][][][][]
C. Contaminate water.
36
The system which uses ABS piping because it is inexpensive and strong is:
A. Drainage, waste and venting.
B. Acid drainage[][][][][][][][][][][][][][]
C. Steam venting[][][][][][][][][][][][][]]
D. Hot water[][][][][][][][][][][][][][][][][]]
A. Drainage, waste and venting.
37
The piping that is highly resistent to chemicals but not very temperature resistant is:
A. Polypropylene (PP).
B. Polyvinyl chloride (PVC).
C. Polyethylene (PE)[][][][][][]]
D. Chlorinated polyvinyl chloride (CPVC).
C. Polyethylene (PE).
38
The piping which is highly resistant to strong acids, alkalis, salt solutions, alchohols and bacteria is:
A. Polypropylene (PP)
B. Polyvinyl chloride (PVC).
C. Polyethylene (PE)[][][][][][]]
D. Chlorinated polyvinyl chloride (CPVC).
B. Polyvinyl chloride (PVC).
39
Glass piping can withstand:
A. Sudden shocks.
B. Alkalis[][][][][][][][][]]
C. High and low temperatures.
D. All acids[][][][][][][][][][][][][][][][][][]]
C. High and low temperatures.
40
The three basic standards used to describe the final dimensions of commonly used piping and tubing are iron pipe size (IPS), ACR copper tubing and:
A. Nominal pipe size (NPS).
B. National pipe threads (NPT).
C. Plastic pipe size (PPS)[][][][][][]]
D. Copper tubing standard (CTS).
D. Copper tubing standard (CTS).
41
A pipe that is described as NPS 3 has roughly a 3":
A. Inside diameter (ID).
B. Outside diameter (OD).
C. Radius[][][][][][][][][][][][][][][]]
D. Wall thickness[][][][][][][][]
A. Inside diameter (ID).
42
An NPS 2 iron pipe and an NPS 2 copper tube will have:
A. The same wall thickness.
B. Different outside diameters.
C. Different inside diameters[][]]
D. The same weights[][][][][][][][][]]
B. Different outside diameters.
43
The National Pipe Thread Tapered (NPT) standard ensures that any ___ threaded pipes will screw together and form a tight seal.
A. ANSI.
B. IPS[][]]
C. OD[][]]
D. NPT[]]
B. IPS.
44
Piping larger than 12" NPS is described by:
A. Millimeters.
B. Iron pipe size II (IPSII).
C. Outside diameter[][][][]
D. Nominal sizes[][][][][][][]
C. Outside diameter.
45
The range of wall thickness available in IPS piping is classified by:
A. Weight classes.
B. Schedule numbers.
C. Standard dimension rations.
D. Nominal sizes[][][][][][][][][][][][][]
B. Schedule numbers.
46
SDR or standard dimension ratios relate pipe:
A. Dimensions to pressure ratings.
B. Dimensions to weights[][][][][][][][]]
C. Weights to wall thickness[][][][][][]]
D. Weights to overall lengths[][][][][]]
A. Dimensions to pressure ratings.
47
Theoretically, different sizes of pipe, made of the same material, could have the same pressure ratings if they had equal:
A. Pipe dimensions.
B. Standard dimension ratios.
C. Outside diameters[][][][][][][]]
D. Schedule numbers[][][][][][][]
B. Standard dimension ratios.
48
Steel piping comes in random lengths of:
A. 1 m (3').
B. 3 m (10').
C. 4 m (13')[]
D. 6 m (20').
D. 6 m (20').
49
Given an NPS 2 iron pipe, an NPS 2 copper tube, an NPS 2 refrigeration tube and an NPS 2 plastic pipe, which would have the largest outside diameter?
A. Iron pipe.
B. Plastic pipe.
C. Copper tube.
D. Refrigeration tube.
A. Iron pipe.
50
Schedule 40 pipe is:
A. Extra strong.
B. Double extra strong.
C. Standard wall thickness.
C. Standard wall thickness.
51
Schedule 80 pipe is:
A. Extra strong.
B. Double extra strong.
C. Standard wall thickness.
A. Extra strong.
52
Schedule 160 pipe is:
A. Extra strong.
B. Double extra strong.
C. Standard wall thickness.
B. Double extra strong.
53
Schedule numbers indicate approximate values of pressure-stress ratios times:
A. 10.
B. 100.
C. 1,000.
D. 10,000.
C. 1,000.
54
A schedule 80S pipe would be:
A. Stainless steel.
B. Aluminum[][][][]]
C. Carbon steel[][]
D. Monel steel[][]]
A. Stainless steel.
55
Compared to type M copper tubing, type K has:
A. More sizes available.
B. Larger diameters[][][]]
C. Thicker walls[][][][][][][]]
D. Thinner walls[][][][][][][]
C. Thicker walls.
56
Soft copper tubing is available in:
A. Large diameters only.
B. Coils[][][][][][][][][][][][][][][]
C. Rigid lengths[][][][][][][][]
D. Small diameters only[]
B. Coils.
57
A copper tube with an outside diameter of 7/8" has a nominal size of:
A. 5/8".
B. 3/4".
C. 7/8".
D. 1"[][]]
B. 3/4".
58
A refrigeration tube with a nominal size of 3/4" will have an outside diameter of:
A. 1/5".
B. 1/2".
C. 3/4".
D. 7/8".
C. 3/4".
59
What colour is type L tubing?
A. Blue.
B. Red[]
C. Yellow.
D. White[]
E. Green[]
A. Blue.
60
What colour is Type K tubing?
A. Blue
B. Red[]
C. Yellow.
D. White[]
E. Green[]
E. Green.
61
What colour is DWV tubing?
A. Blue.
B. Red[]
C. Yellow.
D. White[]
E. Green[]
C. Yellow.
62
What colour is Type M tubing?
A. Blue.
B. Red[]
C. Yellow.
D. White[]
E. Green[]
B. Red.
63
The type of copper tubing found in the finned core of heat transfer units is:
A. Type M.
B. Type L[]
C. Type H[]
D. Type K[]
C. Type H.
64
The colour coding for tubing is found on:
A. The sides of the tubing.
B. Inside walls, near tube ends.
C. Manufacturer's specifications.
D. The wall, at start of each riser.
A. The sides of the tubing.
65
Medical gas tubing is colour coded to indicate:
A. The pressure-stress ratio of tubing.
B. Type of gas carried[][][][][][][][][][][][][][]]
C. Most recent inspection[][][][][][][][][][][]]
D. Nominal size of tubing[][][][][][][][][][][][]
B. Type of gas carried.
66
Some plastics are protected from exposure by:
A. Heat treatment.
B. Dark colour dyes.
C. Neoprene skins[][]
D. Special chemicals.
B. Dark colour dyes.
67
True or False?
The colour of a plastic pipe indicates its pressure rating.
False.
68
What colour is ABS plastic pipe?
A. Grey, white, blue.
B. Black, yellow, orange.
C. Grey, black[][][][][][][][][][]
D. Grey[][][][][][][][][][][][][][][]]
E. Black[][][][][][][][][][][][][][][]
Black.
69
What colour is PVC plastic pipe?
A. Grey, white, blue.
B. Black, yellow, orange.
C. Grey, black[][][][][][][][][][]
D. Grey[][][][][][][][][][][][][][][]]
E. Black[][][][][][][][][][][][][][][]
A. Grey, white blue.
70
What colour is PB plastic pipe?
A. Grey, white, blue.
B. Black, yellow, orange.
C. Grey, black[][][][][][][][][][]
D. Grey[][][][][][][][][][][][][][][]]
E. Black[][][][][][][][][][][][][][][]
D. Grey.
71
What colour is PE plastic pipe?
A. Grey, white, blue.
B. Black, yellow, orange.
C. Grey, black[][][][][][][][][][]
D. Grey[][][][][][][][][][][][][][][]]
E. Black[][][][][][][][][][][][][][][]
B. Black, yellow, orange.
72
What colour is PP plastic pipe?
A. Grey, white, blue.
B. Black, yellow, orange.
C. Grey, black[][][][][][][][][][]
D. Grey[][][][][][][][][][][][][][][]]
E. Black[][][][][][][][][][][][][][][]
C. Grey, black.
73
Referring to the figure below, what is the manufacturer's brand name?
Plasco.
74
Referring to the figure below, what is the pipe diameter?
3/4" OD.
75
Referring to the figure below, what is the ASTM material classification?
PB 2100.
76
Referring to the figure below, what is the ASTM specification document number?
D-3309.
77
Referring to the figure below, what is the Standard Dimension Ratio?
SDR 11.
78
Referring to the figure below, what is the temperature rating?
82°C.
79
Referring to the figure below, what is the pressure rating?
680 kPa.
80
Referring to the figure below, what is the date of manufacture?
870415.
81
Referring to the figure below, the thickness of the pipe wall would be calcularted using ___ and \_\_\_.
3/4" OD and SDR 11.
82
Plastic piping is described by three different wall thickness standards: SDR, IPS(Schedule numbers) and:
A. ASTM.
B. PIP[][][]
C. ANSI[]]
D. NSF[][]
B. PIP.
83
To change the direction of a single piping line from vertical to horizontal, use a:
A. 45° double tee.
B. 90° elbow[][][][]]
C. 2 " cleanout[][][]
D. Sanitary tee[][][]
B. 90° elbow.
84
To connect a branch line so that it is perpendicular to the main line of piping in a water supply system, use a:
A. 45° double wye.
B. Union[][][][][][][][][]]
C. Sanitary coupling.
D. Streamline tee[][][]
D. Streamline tee.
85
A long quarter bend is probably used to change the direction of piping:
A. In a drainage, waste and vent system.
B. That connects a fixture to a vent system.
C. That connects a hot water heater to supply lines.
D. In hot water supply lines[][][][][][][][][][][][][][][][][][][][][][][]
A. In a drainage, waste and vent system.
86
To connect piping or other fittings made from different materials or with different jointing desings, use:
A. An adaptor.
B. A transitory coupling.
C. A close nipple[][][][][][]
D. A two-piece flange[][]
A. An adaptor.
87
Hangers hold the weight of a pipe from:
A. Above.
B. Below[]
C. Adjacent.
D. Inside[][][]
A. Above.
88
Hangers are mounted next to fittings to prevent additional stress on the:
A. Joists.
B. Supports.
C. Foundation.
D. Joints[][][][][]]
D. Joints.
89
What is the force that will cause pipe movement, noise and possible damage if a liquid flowing through a pipe is suddenly stopped?
A. Inertia.
B. Friction.
C. Thermal expansion.
D. Electrolysis[][][][][][][]]
A. Inertia.
90
Weak pipe joints, such as hub and spigot underground pipe joints, may be supported at:
A. The highest point along piping run.
B. Each joint[][][][][][][][][][][][][][][][][][][][][][][]]
C. Every 10 pipe diameters[][][][][][][][][][]
D. Each fixture[][][][][][][][][][][][][][][][][][][][][]
B. Each joint.
91
Excessive pipe motion caused by temperature change is _________________ by specially designed supports and hangers.
A. Prevented.
B. Channeled and eliminated.
C. Increased[][][][][][][][][][][][][][][]]
D. Directed and controlled[][][]
D. Directed and controlled.
92
Electrolysis is a damaging force that can occur when these two metals are in direct contact.
A. Copper and plastic.
B. Ferrous metals and non-ferrous metals.
C. Steel and cast iron[][][][][][][][][][][][][][][][][][][]
D. Dielectric fittings and copper piping[][][]]
B. Ferrous metals and non-ferrous metals.
93
You can allow for movement caused by thermal expansion by:
A. Installing fewer fittings.
B. using heavier pipe[][][][]
C. Building expansion loops.
D. Suspending piping at least 1 m below joists.
C. Building expansion loops.
94
Expansion loops minimize the risk of damage to piping and attached components by:
A. Absorbing and elminating the movement of piping.
B. Supporting but not restraining movement[][][][][][][][][]
C. Expanding at double the rate of piping[][][][][][][][][][][]]
D. Expanding at half the rate of piping[][][][][][][][][][][][][][]]
B. Supporting but not restraining movement.
95
Electrolysis will only occur in the presence of an electrolyte. In most piping systems, the electrolyte will be:
A. Acid.
B. Flux[]
C. Water.
D. Dust[]
C. Water.
96
What type of piping is likely to require more closely spaced hangers and supports?
A. PVC water pipe.
B. Stainless steel[]]
C. Asbestos-cement.
D. PVDF lined pipe[]]
A. PVC water pipe.
97
Before selecting hangers or supports, you should consider the:
A. Weight of piping and fittings.
B. Tensile strength of piping and fittings.
C. Impact resistance of the hanger or support.
D. Ductility of the hanger or support[][][][][][][][][]
A. Weight of piping and fittings.
98
If you are installing copper tubing, what is an important factor you should consider when selecting hangers and supports?
A. Weight.
B. Expansion ratio.
C. Electrolytic action.
D. Maximum inside diameter.
C. Electrolytic action.
99
Why should you consider the material of structural members, floors or ceilings before selecting hangers and supports?
A. To determine the maximum diameter of piping that can be supported.
B. To determine the method of fastening and type of fastners required[][]
C. To allow for building movement[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
D. To strengthen main building supports[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
B. To determine the method of fastening and type of fastners required.
100
A split-ring or clevis hanger might be chosen if:
A. The position of piping might require adjustment after installation.
B. To allow for thermal expansion[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
C. To allow for building movement[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
D. Piping were to be suspended from concrete grinders[][][][][][][][][][]
A. The position of piping might require adjustment after installation.
101
Roller hangers might be selected for a piping installation where temperature and flow changes in piping cause:
A. Rapid expansion at joints.
B. Weakened joints[][][][][][][][]
C. Longitudinal movement[][]
D. Vibration[][][][][][][][][][][][][][][]
C. Longitudinal movement.
102
Vertical risers gernally require support at the base of the pipe and:
A. Every 1.5m (5')
B. At the top of the run.
C. Every 3m (10')[][][][][][]]
D. At each fitting or valve.
D. At each fitting or valve.
103
The two most important factors to consider when determining the size, shape and location of thrust blocks on underground piping are:
A. Size of piping and number of fittings.
B. Total estimated weight of piping and number of 45° turns.
C. Thrust force and bearing strength of soil[][][][][][][][][][][][][][][][]
D. Weight of piping and depth of soil above piping[][][][][][][][][]
C. Thrust force and bearing strength of soil.
104
To lubricate and seal threaded piping, you should use:
A. Teflon thread.
B. Pipe dope[][][]
C. Silicone[][][][][]
D. Plumber's putty.
B. Pipe dope.
105
Two common forms of Teflon thread sealents are liquid and:
A. Gelatin.
B. Spray[][]
C. Stick[][][]
D. Tape[][][]
D. Tape.
106
O-ring shaped gaskets are used to form seals between:
A. Bell-and-spigot piping.
B. Flanged piping[][][][][][]]
C. Grooved piping[][][][][][]
D. Threaded piping[][][][][]
A. Bell-and-spigot piping.
107
The most common types of sealing gaskets used in domestic plumbing installations are made from:
A. Wax.
B. Lead.
C. Silicone.
D. Elastomeric substances.
D. Elastomeric substances.
108
The sealants that may be toxic and should only be used in well-ventilated conditions include:
A. Plumber's putty, Silicone caulking, Wax.
B. Silicone caulking, Pipe dope, Solvent cement.
C. Solvent cement, Vegetable fibre gaskets, Wax.
D. Pipe dope, Graphite packing, Plumber's putty[]
B. Silicone caulking, Pipe dope, Solvent cement.
109
Ready-made gaskets that fit flat flanges and have matching bolt holes for easy installation are:
A. Donuts.
B. Ring gaskets.
C. O-rings[][][][][]]
D. Self-sealing gaskets.
B. Ring gaskets.
110
A self-sealing gasket is found in a:
A. Victaulic fitting.
B. Bell-and-spigot joint.
C. Full face flange[][][][][]
D. Mechanical joint coupling.
A. Victaulic fitting.
111
Thread compounds act to lubricate, seal and protect threaded pipe joints from:
A. Overtightening.
B. Damage from rapid temperature changes.
C. Rust and corrosion[][][][][][][][][][][][][][][][][][][][][]]
D. Staining[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
C. Rust and corrosion.
112
Metal gaskets are usually found in:
A. Fixture drains.
B. Industrial applications.
C. Medical fixtures and fittings.
D. Hot water piping[][][][][][][][][][]
B. Industrial applications.
113
The sealent used to form watertight seals under faucets, drains and strainers is:
A. Plumber's putty.
B. Silicone caulking.
C. Solvent cement[]]
D. Teflon[][][][][][][][][][]
A. Plumber's putty.
114
Plumber's install non-potable water systems that transport water that is:
A. Extremely acidic.
B. Full of suspended dirt and sediment.
C. Not safe for human consumption[][][]]
D. Not safe to wash with[][][][][][][][][][][][][][]
C. Not safe for human consumption.
115
The hot water that flows in parts of potable water systems or hot water heating systems can lower the ability of plastic pipe or tubing to withstand pressure and inrease metal tubing and fitting:
A. Corrosion.
B. Rust[][][][][]]
C. Oxidation[]
D. Electrolysis.
A. Corrosion.
116
Although hot water heating systems are initially filled with potable water, protective devices must be installed to ensure that the water in the heating system does not enter the household potable water supply. This is necessary because the water in the heating system is:
A. Too hot.
B. Contaminated by algae.
C. Contaminated by chemicals.
D. Stagnent[][][][][][][][][][][][][][][][][][]
C. Contaminated by chemicals.
117
A sanitary drainage system conducts:
A. Potable water.
B. Chemically contaminated water.
C. Storm water and waste water[][]]
D. Wastewater and sewage[][][][][][]]
D. Wastewater and sewage.
118
Medical gas piping must be installed by plumbers with special gas tickets that ensure they are familiar with the risk of:
A. Contamination.
B. Explosions[][][][]
C. Thermal fluctuations.
D. Extremely low pressure systems.
B. Explosions.
119
Specialty piping systems may use plastic lined pipe or glass piping to carry substances such as:
A. Ultra pure water, corrosive chemicals.
B. Radioactive substances, very hot water.
C. Extremely cold liquids, high pressure gases.
D. Steam, heavy water[][][][][][][][][][][][][][][][][][][][][][]]
A. Ultra pure water, corrosive chemicals.
120
True or False?
A cross fittinig can be installed when drainage piping runs inside a house.
False.
121
True or False?
A sanitary T fitting can be used to change the direction of horizontal flow in a drainage system.
False.
122
True or False?
A vertical drainage pipe shall not carry both sewage and storm water.
True.
123
True or False?
Every pipe in a drainage system shall have a minimum downward slopd of 1:50.
False.
124
True or False?
Polyethylene pipe can only be used for water service applications.
True.
125
True or False?
Cast iron soil pipe and fittings shall not be used in a water system.
True.
126
True or False?
Galvanized steel piping is no longer permitted in any part of a water distribution system.
False.
127
True or False?
Coper tubing should not be used to drain urinals.
True.
128
True or False?
The pressure ratings of CPVC piping decrease as the operating temperatures of flows increase.
True.
129
True or False?
Screwed cast iron water fittings shall not be used in a drainage system.
True.
130
True or False?
Lead waste pipe is not permitted in water systems or for building sewars.
True.
131
True or False?
Brass threaded fittings should be used on any visible water drain lines inside a building.
False.
132
True or False?
## Footnote
When a pipe is reduced, the reducer fitting shall be installed so that the system can be completely drained.
True.
133
True or False?
Removable cleanout plugs for ferrous metal fittings must be made from ferrous metal.
False.
134
"MJ" pipe is a term used to describe:
A. Groved iron piping.
B. Hub-and-spigot iron piping.
C. Plain-ended DWV cast iron piping.
D. Flared iron piping[][][][][][][][][][][][][][][]]
C. Plain-ended DWV cast iron piping.
135
Fusion welding is a method of joining pipe that may be used with:
A. Cast iron piping.
B. Plastic piping[][][]
C. Soft copper piping.
D. Malleable iron piping.
B. Plastic piping.
136
Copper tubing and fittings may be joined by:
A. But-or-socket-welding.
B. Soldering or brazing[][]
C. But-or-socket-fusion[][]]
D. Solvent cement[][][][][][]]
B. Soldering or brazing.
137
When a metal pipe is inserted into a fitting and welded, this is known as a:
A. Socket-weld.
B. Insert soldering.
C. Socket-fusion[][]]
D. Compression welding.
A. Socket-weld.
138
Solvent welding is a technique used to join:
A. All plastic pipe.
B. PE pipe[][][][][][][]
C. PB and PE pipe
D. CPVC, PVC and ABS pipe.
D. CPVC, PVC and ABS pipe.
139
Pipes that may have threaded ends include iron, steel and some types of:
A. PB and PE.
B. Copper and vitreous clay.
C. Plastic and copper[][][][][][]]
D. Lead and clay[][][][][][][][][][]]
C. Plastic and copper.
140
A type of flat-faced fittings used to bolt plastic or metal piping together are:
A. Victaulic couplings.
B. Flanges[][][][][][][][][][]]
C. Compression couplings.
D. Unions[][][][][][][][][][][][][][][]]
B. Flanges.
141
Copper and plastic tubing are commonly joined with:
A. Compression fittings and slip on fittings.
B. Flanges and unions[][][][][][][][][][][][][][][][][][]]
C. Compression fittings and MJ clamps[][][]]
D. MJ clamps and O-rings[][][][][][][][][][][][][][][]]
A. Compression fittings and slip on fittings.
142
A common type of slip on joint has a groove machined into the hub-end of a pipe that:
A. Holds the other pipe in place.
B. Reduces pressure exerted on the joint.
C. Holds an O-ring in place[][][][][][][][][][][][][]]
D. Supports a metal clamp[][][][][][][][][][][][][][]
C. Holds an O-ring in place.
143
Polybutelene pipe cannot be solvent welded so it must be joined with:
A. MJ clamps.
B. Victaulic fittings.
C. Fusion welding[]
D. Insert fittings[][]]
D. Insert fittings.
144
One method of calculating the lengths of piping needed to complete a plumbing installation is to measure ____________ and __________ and subract the fitting allowance.
A. Face-to-center, face-to-face.
B. Face-to-face, thread engagement.
C. Center-to-center, end-to-end[][][][][]
D. Center-to-center, end-to-center[][]]
D. Center-to-center, end-to-center.
145
The distance from the end of a pipe (inserted into a fitting) to the center of the fitting is known as:
A.Thread engagement.
B. Fitting allowance[][][]]
C. End-to-center measurement.
D. Pipe allowance[][][][][][][][][][][][]]
B. Fitting allowance.
146
When you are measuring piping that will be joined by flanges, you should allow for the:
A. Thickness of the flange.
B. Weight of the flange[][][]
C. Thickness of the gasket.
D. Surface area of the gasket.
C. Thickness of the gasket.
147
Flared compression fittings can be used to join:
A. Copper and some types of iron pipe.
B. Soft copper and some types of plastic pipe.
C. Soft PE and soft copper pipe[][][][][][][][][][][][][][]
D. PE and copper pipe[][][][][][][][][][][][][][][][][][][][][][]
B. Soft copper and some types of plastic pipe.
148
Before they are joined, all cut pipe ends should be:
A. Deburred.
B. Flared[][][]]
C. Beveled[][]
D. Polished[]]
A. Deburred.
149
The main purpose of a valve is to:
A. Change direction of piping.
B. Increase pressure in lines[]]
C. Control the flow in a system.
D. Control the temperature in a system.
C. Control the flow in a system.
150
Bronze is common maeterial used to make valves. Bronze valves are usually:
A. Available in smaller sizes only.
B. Available in larger sizes only[][]
C. Used in high pressure applications.
D. Susceptible to corrosion[][][][][][][][][][]
A. Available in smaller sizes only.
151
Malleable iron is a tough material used to make stop valves that are used in:
A. High temperature system.
B. Gas distribution system[][]]
C. Extremely cold environments.
D. Chemical waste lines[][][][][][][]]
B. Gas distribution system.
152
Valves used in severe applications may have seating surfaces, stems and disks made from:
A. Stainless steel.
B. Duriron[][][][][][]]
C. Brass[][][][][][][][]]
D. Copper[][][][][][]]
A. Stainless steel.
153
Valves used in piping that carries highly corrosive liquids may have seating surfaces, stems and disks made from:
A. ABS.
B. Polyethylene (PE).
C. Polyvinylidene fluoride (PVDF).
D. Hardened rubber[][][][][][][][][][][][]
C. Polyvinylidene fluoride (PVDF).
154
If valves are stamped with two numbers, the first number will indicate the:
A. Cold service rating.
B. Retail price[][][][][][][]]
C. Steam service rating.
D. Safe working pressure.
C. Steam service rating.
155
Piping systems where there is a risk of excessive heat or fire will use valves made from:
A. Poly-vinyl chloride (PVC).
B. Aluminum[][][][][][][][][][][][][][]
C. Tempered polyethylene (PE).
D. Steel[][][][][][][][][][][][][][][][][][][][][][]
D. Steel.
156
The most common factor that causes the pressure rating of a valve to drop drastically is:
A. Rust.
B. Incorrect installation.
C. Increased temperature.
D. Sudden changes in flow.
C. Increased temperature.
157
Steam ratings indicate:
A. Safe working pressure.
B. Maximum operating pressure.
C. A class of service[][][][][][][][][][][]
D. Minimum working pressures[]
C. A class of service.
158
If a valve only has a manufacturer's name and size indicated, where would you check for further information about service ratings?
A. With a plumbing engineer.
B. Inside the valve body[][][][]]
C. On project drawings[][][][][]]
D. Manufacturer's specification sheets.
D. Manufacturer's specification sheets.
159
Based on the following information:
3.
150.
200 WOG.
The cold service rating of this vale is:
A. Not indicated.
B. 200 psi[][][][][][]
C. 150 psi[][][][][][][]
D. 3 atmospheres.
B. 200 psi.
160
Based on the following information:
3.
150.
200 WOG.
The pipe size is:
A. 150mm.
B. 200mm.
C. 3"[][][][][][]
D. WOG[][][]
C. 3".
161
Based on the following information:
3.
150.
200 WOG.
The steam rating of this valve is:
A. 150 psi.
B. 200 psi.
C. 3 atmospheres.
D. Not indicated[]]
A. 150 psi.
162
Globe valves, gate valves and plug valves are all examples of:
A. Pneumatic valves.
B. Manual valves[][][]]
C. Hydraulic valves[]]
D. Solenoid valves[][]
B. Manual valves.
163
The valve that closes when the flow in a pipe line is reversed is the:
A. Relief.
B. Butterfly.
C. Check[][]
D. Gate[][][]
C. Check.
164
Valves on domestic hot water supply tanks and heaters include:
A. Gate, Check, Safety.
B. Pressure, Temperature, Vacuum Relief.
C. Swing Check, Butterfly, Temperature Relief.
D. Globe, Plug, Pressure Relief[][][][][][][][][][][][][][]
B. Pressure, Temperature, Vacuum Relief.
165
Mechanical devices commonly used to prevent backflow in plumbing systems include:
A. Spring Check Angle Valves, Vacuum Breakers.
B. Pressure Reducing Valve Stations, Anti-Siphonage Check Valves.
C. Double Check Valve Assemblies, Pressure Vacuum Breakers[][][][]
D. Double Swing Check Valve Stations, Atmospheric Pressure Relief Valves.
C. Double Check Valve Assemblies, Pressure Vacuum Breakers.
166
All valves cause some degree of flow loss due to friction, even in the full-open position. Which type of valve causes the greatest reduction in flow even when the valve is open?
A. Globe valve.
B. Gate valve[]]
C. Swing check valve.
D. Plug valve[][][][][][][][]]
D. Plug valve.
167
Which type of valve is often referred to as a "cock" or "bibb"?
A. Globe valve.
B. Angle valve.
C. Spring check valve.
D. Plug valve[][][][][][][][]]
A. Globe valve.
168
A type of valve that may be used in oil or gas lines where fine throttling control is needed is the:
A. Solid-wedge gate valve.
B. Spring angle valve[][][][]]
C. Needle-type globe valve.
D. Needle plug valve[][][][][][]]
C. Needle-type globe valve.
169
To ensure that sediment does not collect around the valve seat and moving components, valves are normally installed:
A. Downstream from filters, perpendicular to flows.
B. At least 3 pipe diameters upstream from an elbow.
C. On horizontal lines in the upright position[][][][][][][][][]]
D. A minimum of 10 pipe diameters downstream from an elbow.
C. On horizontal lines in the upright position.
170
The valve which must be installed in the upright position is the:
A. Globe or gate.
B. Pressure relief or temperature relief.
C. Check or float[][][][][][][][][][][][][][][][][][][][]]
D. Butterfly or gate[][][][][][][][][][][][][][][][][][]]
C. Check or float.
171
In a system exposed to freezing temperatures, globe valves should never be installed:
A. Without extra insulation.
B. Upside down[][][][][][][][][][]
C. Within 3 pipe diameters of an elbow.
D. Perpendicular to flow[][][][][][][][][][][][][][]
B. Upside down.
172
Valves must be positioned carefully, particularly at any sharp change in direction of piping, because they cause:
A. Turbulence.
B. Decreased pressures.
C. Increase temperatures.
D. Constant shock to a system.
A. Turbulence.
173
When installing valves downstream from elbows, the valve should be located:
A. 10 pipe diameters from the nearest fixture.
B. 3 pipe diameters from the nearest hanger or support.
C. 10 pipe diameters from the elbow[][][][][][][][][][][][][][][][][][]]
D. 3 pipe diameters from any pipe joint[][][][][][][][][][][][][][][]]
C. 10 pipe diameters from the elbow.
174
Flow pressure should be _____ the disk of a check valve.
A. Around.
B. Through.
C. Under[][]]
D. Over[][][]]
C. Under.
175
Plastic water service pipes (for cold water only) require which valve at the building end?
A. Shut-off.
B. Vacuum relief.
C. Butterfly[][][][][]]
D. Check[][][][][][][]
D. Check.
176
Every water service pipe shall be provided with a ______ valve where the pipe enters the building.
A. Shut-off.
B. Needle valve.
C. Stop-and-waste valve.
D. Backflow preventer[][]]
A. Shut-off.
177
Pressure reducing valves are installed in domestic applications to reduce incoming water to between:
A. 35 kPa to 55 kPa (5 psi to 8 psi).
B. 69 kPa to 103 kPa (10 psi to 15 psi).
C. 172 kPa to 228 kPa (25 psi to 33 psi).
D. 344 kPa to 413 kPa (50 psi to 60 psi).
D. 344 kPa to 413 kPa (50 psi to 60 psi).
178
A _____ valve and a _____ valve must be installed on the discharge side of a sewage pump.
A. Check, Gate.
B. Pressure relief, Globe.
C. Gate, Stop-and-waste cock.
D. Butterfly, Vacuum Relief[][][][]
A. Check, Gate.
179
Referring to the figure below, it is a:
A. An adaptor.
B. A streamline elbow.
C. A 45° DWV elbow[][]
D. A coupling[][][][][][][][]
B. A streamline elbow.
180
Referring to the figure below, it is a:
A. 45° elbow.
B. Three-way elbow.
C. 45° wye[][][][][][][][][]
D. DWV tee[][][][][][][][]
C. 45° wye.
181
Referring to the figure below, it is a:
A. A wye.
B. A sanitary tee.
C. An offset[][][][][]
D. A short turn tee.
B. A sanitary tee.
182
Referring to the figure below, it is a:
A. Bushing.
B. Roll stop coupling.
C. Copper adaptor[][]
D. MJ coupling[][][][][]
B. Roll stop coupling.
183
Referring to the figure below, it is a:
A. Compression fitting.
B. 3-piece coupling[][][]
D. Gasketed union[][][]]
E. Insert fitting[][][][][][][]
A. Compression fitting.
184
Referring to the figure below, it shows:
A. A u-bolt.
B. A roller hanger.
C. An adjustable clevis hanger.
D. A ring hanger[][][][][][][][][][][][]]
C. An adjustable clevis hanger.
185
Referring to the figure below, it is a:
A. U-Clamp.
B. Riser clamp.
C. Two-hole clip.
D. Concrete insert.
B. Riser clamp.
186
Referring to the figure below, it shows a:
A. Pipe saddle.
B. Pipe ring hanger.
C. Beam clamp[][][][]]
D. Pipe stachion saddle.
D. Pipe stachion saddle.
187
Referring to the figure below, it is a:
A. Riser clamp.
B. Roller hanger.
C. Split ring hanger.
D. Trapeze hanger[]
C. Split ring hanger.
188
Referring to the figure below, it is a:
A. Trapeze hanger.
B. Roller hanger[][]]
C. Pipe saddle[][][][]
D. Spring hanger[]]
B. Roller hanger.
189
Referring to the figure below, it is a:
A. Toggle bolt.
B. Thrust block.
C. Shallow ring clamp.
D. Rod-and-turnbuckle.
B. Thrust block.
190
Referring to the figure below, it is a:
A. Conrete insert.
B. Beam clamp[][]]
C. Spring hanger[]
D. Concrete flange.
A. Conrete insert.
191
Referring to the figure below, it is a:
A. Concrete insert.
B. Clevis hanger[][]
C. Wall pipe support.
D. Spring hanger[][][]
D. Spring hanger.
192
Referring to the figure below, it is a:
A. Rod and turnbuckle.
B. Beam clamp[][][][][][][]
C. An adjustable clevis hanger.
D. Spring hanger[][][][][][][][][][][][]]
A. Rod and turnbuckle.
193
Referring to the figure below, it is a:
A. Beam clamp.
B. Riser clamp[]]
C. Rod and turnbuckle.
D. Insulation shield[][][]]
A. Beam clamp.
194
Referring to the figure below, identify the type of valve shown.
A. Swing check valve.
B. Pressure relief valve.
C. Butterfly valve[][][][][][]
D. Plug valve[][][][][][][][][]
D. Plug valve.
195
Referring to the figure below, if the valve were installed in a water supply line, the water flow would be _______ and the valve would be \_\_\_\_.
A. Stopped, shut.
B. Throttled, half-open.
C. Full flow, fully open[]]
D. Throttled, quarter-open.
A. Stopped, shut.
196
Referring to the figure below, identify the type of valve shown.
A. Needle valve.
B. Solid-wedge gate valve.
C. Plug-type globe valve[][]
D. Angle valve[][][][][][][][][][][]
B. Solid-wedge gate valve.
197
True or False?
Referring to the figure below, the valve shown is closed and no water can travel through it.
True.
198
Referring to the figure below, identify the type of valve shown.
A. Spring check valve.
B. Solid-wedge gate valve.
C. Needle-type globe valve.
D. Disk-type globe valve[][][]
D. Disk-type globe valve.
199
Referring to the figure below, identify the type of valve shown.
A. Plug-type gate valve.
B. Ball valve[][][][][][][][][][]]
C. Spring check valve[]]
D. Lift check valve[][][][]]
D. Lift check valve.
200
Referring to the figure below, identify the type of valve shown.
A. Spring check angle valve.
B. PVC check valve[][][][][][][][]
C. Vacuum relief valve[][][][][]]
D. Swing check valve[][][][][][]]
B. PVC check valve.
201
The employer must report a fatal accident to the WCB:
A. Anytime within a week of the occurence.
B. At the end of the fiscal year[][][][][][][][][][][][]
C. Immediately[][][][][][][][][][][][][][][][][][][][][][][][][][]
D. Only if it is part of the union requirements.
C. Immediately.
202
In the workplace, who must take responsibility for making sure that the workplace is safe?
A. Only the employees.
B. Just the union[][][][][][]
C. Worker's Compensation Board.
D. The employer and employees[]
D. The employer and employees.
203
If you find a condition that is unsafe or could be harmful, you should:
A. Report it immediately to your supervisor or employer.
B. Refuse to work and go home[][][][][][][][][][][][][][][][][][][][][][]
C. Not say anything becuase you might lose your job[][]]
D. Write a report and send it to the safety committee[][]]
A. Report it immediately to your supervisor or employer.
204
Name four workers not covered by WCB.
Plumbing 1 students.
Professional athletes.
Self-employed individuals.
(Who work for two or more employers in a day)
Volunteers[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
205
A person who instructs, directs and controls workers in the perfromance of their duties is the definition of?
Supervisor.
206
A thing or condition that may expose a person to a risk of injury or occupational disease is the definition of?
Hazard.
207
In respect to a worker or person means one who, by reason of training or experince, is familiar with the work and hazards involved is the definition of?
Qualified.
208
An employer must report a serious injury to the WCB within what lenght of time?
Within 3 days of the injuries occurence.
209
What is required if there is a danger of tools or materials falling off the edge of a work platform?
Toeboards.
210
What is the pressure limitation for compressed air when blowing dust from a worker's clothing?
70 kPa guage (10 psig).
211
Within what time period must a worker report an accident or injury?
Immediately.
212
Who must provide the workers the information, instruction, training, and supervision necessary to ensure the health and safety of those workiers in carrying out their work and to ensure the health and safety of other workers at the workplace?
The employer.
213
Loose clothing.
| (Just need to read)
Loose fitting clothing may be caught by moving equipment or other sationary objects.
214
Long hair.
| (Just need to read)
Cranial and facial hair must be confined, or worn at a length which will prevent it from being snagged or caught in the work process.
215
Loud noises.
| (Just need to read)
When working in a noisy area wear hearing protectors.
216
Dust in the air.
| (Just need to read)
When working in a dusty place, wear a respirator to protect your throat and lungs, googles to protect your eyes, or a combination respirator-goggle.
217
Someone working overhead.
(Just need to read)[][][][][][][][][]]
If someone is working above you, be extremely cautious and wear a hardhat.
218
Rings and metal watchbands.
(Just need to read)[][][][][][][][][]]
Do not wear rings and metal watchbands as they are a hazard in the workplace. Because they conduct electricity, they can become very hot if you simultaneausly contact a battery terminal and the ground when working or a vehicle or some other type of electrical equipment.
219
Cluttered workbenches.
(Just need to read)[][][][]]
Do not work on a clutterred workbench. You might knock over a container of liquid or knock something off the bench and onto the floor. Either situation could cause damage or injury.
220
Oil or grease on the floor.
(Just need to read)[][][][][][]
Oil or grease on the floor is a very real hazard. Wipe up the spill before you or someone else slips and are injured.
221
Storing oily rags.
| (Just need to read)
Oily and greasy rags should be stored in a fireproof receptacle.
222
Well-fitting clothing of good quality that is not baggy but with long sleeves on shirts and full length trousers, not tank tops and shorts. It means shoes or boots, not sandals is the definition of?
Appropriate apparel.
223
How often are hearing tests required?
Every year.
224
A working directing traffic must wear?
High visibility apparel.
225
Clean respirable air in a confined space, means an atmosphere which is equivalent to clean outside air containting __ % oxygen.
20.
226
An employer must ensure that a fall protection system is used when a fall of __ feet (\_\_ m) or more may occur.
10.
3[]
227
What is the maximum free fall limit for a personal fall arrest system without a shock absorber?
4 feet (1.2 m).
228
Are combination locks allowed to be used for a lockout?
No.
229
An area other than an underground working, that:
A. Is enclosed or partially enclosed.
B. Is not designed or inteded for continuous human occupancy.
C. Has limited or restricted means for entry or exit that may complicate the provisions of first aid, evacuation, rescue or other emergency response sevices
and
D. Is large enough and so configured that a worker could enter to perform assigned work[][][][][][][][][][][][][][][][][]
Is the defintion of?
Confined space.
230
Shoring should extend ____ above ground level.
A. One foot.
B. Two feet[]
C. Three feet.
D. Four feet[]]
A. One foot.
231
When can silver solder containing cadmium be used?
Must not be used without prior written approval from the board.
232
How many fire extinguishers are required where welding or cutting is done?
At least one fire extinguisher of a suitable type and capacity.
233
A worker must not work from the top __ rungs of a ladder.
A. One.
B. Two.
C. Three.
B. Four[]]
B. Two.
234
True or False?
Only a qualified person may handle or use a powder actuated tool.
True.
235
A powder-actuated tool must not be driven:
A. Within 1/2" from the edge of a steel base.
B. Within 2" of a weld[][][][][][][][][][][][][][][][][][][][]]
C. Into a spalled concrete surface[][][][][][][][][]
D. All of the above[][][][][][][][][][][][][][][][][][][][][][][]
D. All of the above.
236
List the classes of fires and give an example of the type of material being burned in each.
Class A - Paper, Textiles, Wood.
Class B - Gasoline or Oil[][][][][][]
Class C - LIve Electrical Equip[]
Class D - Combustable Metals.
237
List the classes of fires that may be extinguished with the following types of extinguishers:
A. Carbon Dioxide (CO2).
B. Dry Chemical[][][][][][][][]
C. Water[][][][][][][][][][][][][][][]
A. Class B and C fires.
B. Class B and C fires.
(But some can be used on class A fires only)
C. Class A fires or to cool down large Class D fires.
238
What is the best general fire extinguisher currently available?
Triplex dry chemical.
239
When drawing the same object using different scales, which scale will produce the largest drawing?
A. 1/8" = 1'0" scale.
B. 3" = 1'0" scale[][]
C. 1/4" = 1'0" scale.
D. 1" = 1'0 scale[][]]
D. 1" = 1'0 scale.
240
When drawing an object in mm using different scales, which scale will produce the smallest drawing?
A. 1:100.
B. 1:50[]
C. 1:20[]
D. 1:2[][]
A. 1:100.
241
Architect's scales use ratios of:
A. Inches to a foot.
B. Feet to yards[][]]
C. Inches to mm[][]]
D. mm to m[][][][][][]]
A. Inches to a foot.
242
State two reasons why it is important to obtain dimensions by measuring drawings.
1. Drawing is not necessarily drawn to scale.
2. Shrinkage may occur in the reproduction process.
243
State reasons why it is not usually necessary to measure drawings for dimensions.
All the necessary dimensions are usually included on the blueprints.
244
State the procedure required to obtain dimensions that appear to be missing.
Examine several or all prints in the set.
Measure only after you are sure dimensions cannot be found from information given on the print.
245
State why arithmatic is necessary occassionally for finding dimensions.
To obtain dimensional (size) information.
246
Why are piping symbols used?
To visually represent pipes, fittings etc.
247
State two basic requirements for symbols.
Easy to draw.
Must be simple.
248
Why are single-line symbols usually used in piping drawings?
Because they are the simpilest and easiest to draw.
249
True or False?
Lengths of valves and fittings in single-line drawings are drawn to scale.
False.
250
True or False?
Flanged or welded valves and fittings in double-line drawings are drawn to scale.
True.
251
List the three views normally used in orthographic piping drawings.
1. Front.
2. Plan[]
3. Right.
252
State one advantage of orthographic respresentations.
It pinpoints the exact location of equipment.
253
State two limitations of orthographic representations.
1. Not sufficient for systems with many overlapping pipes, valves and fittings.
2. Two views must always be used, making interpretation difficult when the piping system is intricate.
254
State how an isometric piping drawing can be recognized?
1. Lines are drawn at an angle of 30° to the horizontal.
2. Vertical lines are drawn vertically[][][][][][][][][][][][][][][][][]]
255
State the number of dimensions shown by an isometric drawing.
Three.
256
State one advantage of isometric piping drawings over orthographic piping drawings.
They are easier to interpret.
257
State the type of information contained in notes appearing on drawings.
Written descriptions of material/equipment/valves shown in symbol form on drawing.
258
State where the scale of a drawing usually appears.
Bottom of drawing.
Title panel[][][][][][][]]
259
State what is meant by "A1 of 4."
First architectural drawing of four.
260
In flow diagrams how are larger pipes with larger flow shown?
By heavier lines.
261
Piping drawings are indicated by:
A. A.
B. S.
C. M.
D. E.
C. M.
262
True or False?
Gate valves are commonly used in drainage, waste and vent systems.
False.
263
True or False?
A large hot water heating system requires a large daily supply of fresh water.
False.
264
Flanges are usually used on pumps because:
A. The joints most easily prevent leaks.
B. Maintenance is easy[][][][][][][][][][][][][][]]
C. Threaded joints tend to stretch and leak.
B. Maintenance is easy.
265
Vacuum breakers prevent:
A. Excessive pressure.
B. Back siphonage[][][]]
C. Excessive temperature.
D. Thermal expansion[][][]]
B. Back siphonage.
266
List five types of information shown on a plot plan.
1. Contour lines.
(Topography)[][]
2. Dimensions[]
3. Elevations of specific points.
4. Locations of public utilities[]]
5. Property line[][][][][][][][][][][][][]]
267
List five types of information shown on a site plan.
1. Contour lines showing existing slope.
2. Dimensions of lot[][][][][][][][][][][][][][][][][]]
3. Elevations of specific points[][][][][][][][]
4. Location of building/public utilities[][]]
5. Property line[][][][][][][][][][][][][][][][][][][][][]
268
List three types of information shown on a floor plan.
1. Appliances, Fixtures and Equipment
2. Layout of rooms[][][][][][][][][][][][][][][][][][]
3. Types of materials used[][][][][][][][][][][]
269
State what is shown by an elevation drawing.
Finished exterior view of one side of a building.
270
State what is shown by a sectional-view drawing.
Cross section of part of a building.
(Detailed construction information,including materials to be used)
271
Large-scale drawings of an object not shown in complete detail on regular plans or elevations is the definition of?
Detail.
272
List the items shown on a structural drawing.
1. Openings for chimneys, doorwells, stairs and windows.
2. Supporting members[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
3. Wall and partition construction[][][][][][][][][][][][][][][][][][][][][][]
273
List two types of information shown on an electrical plan.
1. Dotted lines show that a switch and fixture are connected.
2. Symbols show location of controls, fixtures and outlets[][][]
274
List three types of information shown on a climate control plan.
1. Location of ducts or heating pipes.
2. Location of equipment[][][][][][][][][][][]
3. Location of register or radiators[][]]
275
Manila rope with one or more coloured strands is:
A. No 1 grade.
B. Yacht rope[]
C. Hardware store rope.
D. Bolt rope[][][][][][][][][][][]
A. No 1 grade.
276
The strongest of the ropes listed below is:
A. Polypropylene.
B. Sisal[][][][][][][][][]]
C. Polyester[][][][][]]
D. Nylon[][][][][][][][]]
C. Polyester.
277
The type of dry rope with the best electrical insulating properties is:
A. Manila.
B. Polypropylene.
C. Polyester[][][][][]
D. Nylon[][][][][][][][]
B. Polypropylene.
278
When loaded to it's breaking point, nylon rope will stretch up to:
A. 10% of it's original length.
B. 20% of it's original length.
C. 30% of it's original length.
D. 40% of it's original length.
D. 40% of it's original length.
279
What is a thimble used for?
To reduce the stress on the rope at connections.
280
Which synthetic rope will float on water?
Polypropylene.
281
To remove new rope from its shipping coil, you should:
A. Pull it from the inside of the coil.
B. Roll the coil across the floor[][][][]
C. Mount the coil on an axle[][][][][][]
D. Cut portions from the side of the coil.
A. Pull it from the inside of the coil.
282
What is the purpose of whipping?
Prevents the rope strands from unravelling.
283
Ropes are best stored in areas which are:
A. Well ventilated.
B. Moist[][][][][][][][][]
C. Above 25°C (77°F)
D. Exposed to sunlight.
A. Well ventilated.
284
The maximum load imposed on a rope should never exceed:
A. 3/4 of it's breaking strength.
B. 1/2 of it's breaking strength.
C. 1/9 of it's breaking strength.
D. 1/10 of it's breaking strength.
C. 1/9 of it's breaking strength.
285
Sharp bends and knots can reduce the strength of a rope by up to:
A. 25%.
B. 40%.
C. 50%.
D. 85%.
C. 50%.
286
The portion of the rope which forms the loop is called the:
A. Middle.
B. Standing part.
C. Circle[][][][][][][]]
D. Bight[][][][][][][][]
D. Bight.
287
Which of the knots listed below froms a non-slip loop?
A. Square knot.
B. Bowline[][][][]]
C. Reef knot[][][]
D. Timber hitch.
B. Bowline.
288
The knot which multiplies the tension you apply to a rope is the:
A. Timber hitch.
B. Bowline[][][][]]
C. Sheet bend[]
D. Trucker's knot.
D. Trucker's knot.
289
If you had to join a large-diameter rope to a small-diameter rope, you would use a:
A. Square knot.
B. Carrick bend.
C. Sheet bend[]]
D. Half hitch[][][]]
C. Sheet bend.
290
To join two ropes of the same diameter together, you should use a:
A. Double half hitch.
B. Reef knot[][][][][][][]
C. Sheet bend[][][][][]
D. Timber hitch[][][][]
B. Reef knot.
291
For overhead lifting, you should use a:
A. A single piece of rope.
B. Ropes joined with a sheet bend.
C. Ropes joined with a half hitch[][]]
D. Any two ropes of equal size[][][]]
A. A single piece of rope.
292
What is the minimum clearence required while working around a 75,000 volt power line?
3 meters (10 feet).
293
What is the minimum clearence required while working around a 200,000 volt power line?
4.5 meters (15 feet).
294
Describe "center of gravity."
The point at which an object balances regardless of it's position.
295
Where should the slings attach to the load, in relation to the center of gravity?
Above the center of gravity.
296
Where will the center of gravity of a load be positioned after it is lifted off the ground?
Directly below the hook.
297
Does the position of the center of gravity depend upon how the load is rigged?
If rigged improperly, the shifting may cause the load to become unstable and result in an accident.
298
Turbuckles are used to adjust the length of slings so that loads can be lifted:
A. In a level position.
B. Higher[][][][][][][][][][]
C. Vertically[][][][][][][][]
D. From below[][][][][]
A. In a level position.
299
The screw threads at each end of a turnbuckle's sleeve must be:
A. Locking at one end and non-locking at the other.
B. Identical[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
C. A larger diameter at one end than at the other[][]]
D. Left handed at one end and right handed at the other.
D. Left handed at one end and right handed at the other.
300
Shoulder-type eye bolts are able to withstand pulls at an angle no greater than:
A. 60° to the horizontal.
B. 60° to the vertical[][][]
C. 30° to the side[][][][][]]
D. 45° to the vertical[][]]
D. 45° to the vertical.
301
When several ropes are attached to a single hook, make the connection to the hook using a:
A. Turnbuckle.
B. U-bolt[][][][][]
C. Shackle[][][]
D. Series of cable clips.
C. Shackle.
302
What two purposes do choker hooks serve?
Protect the rope from sharp bends.
They can be used as choker hitches.
303
The U-bolt part of a cable clip must be installed so it bears on the:
A. Thimble.
B. Live end of the rope.
C. Dead of the rope[][][]]
D. Whipping[][][][][][][][][][]
C. Dead of the rope.
304
The number of cable clips required for a connection depends on the:
A. Diameter of the rope.
B. Type of clipe used[][]]
C. Mass of the load[][][][]
D. Strength of the rope.
A. Diameter of the rope.
305
Correctly-installed cable clips will reduce the breaking strength of wire rope by:
A. 10%.
B. 20%.
C. 30%.
D. 40%.
B. 20%.
306
When it is necessary to equalize the load on sling legs and to make sure the loads are equal and when two hoist lines are used is the definition of?
When are equilizer beams used.
307
What sling type should be used to lift 25 pieces of steel pipe 8 meters (25 feet) long?
Choker hitch.
Double-wrap basket.
308
True or False?
Pipe rollers can be used to move boilers or chillers.
True.
309
Tirfor jacks have capacities up to:
A. 7000 kg.
B. 1500 kg[]
C. 2200 kg.
D. 3200 kg.
D. 3200 kg.
310
Chain hoists have capacities up to:
A. 7000 kg.
B. 8000 kg.
C. 9000 kg.
D. 10000 kg.
C. 9000 kg.
311
Manual lifting devices include:
A. Chain fall.
B. Block and tackle.
C. Come-along[][][][]]
D. All of the above[]
D. All of the above.
312
A pulling device that can use either chain or wire is the:
A. Chain fall.
B. Block and tackle.
C. Come-along[][][][]]
D. Gin pole[][][][][][][]]
C. Come-along.
313
An apparatus capable of long, continuous lifts is the:
A. Chain hoist.
B. Come-along.
C. Pallet truck[]]
D. Tirfor jack[][]
D. Tirfor jack.
314
Tirfor jacks can be made to travel in the opposite direction by:
A. Flipping the gear lever.
B. Turning the handle in the opposite direction.
C. Releasing the ratchet[][][][][][][][][][][][][][][][][][][][][]]
D. Relocating the pipe handle[][][][][][][][][][][][][][][]]
D. Relocating the pipe handle.
315
A tirfor jack is a hoisting device which uses a:
A. Nylon rope.
B. Metal chain.
C. Wire rope[]]
D. Fiber rope[]
C. Wire rope.
316
If you overload a Tirfor jack, the shear pin will break and:
A. The load will drop.
B. The handle will jam.
C. A warning light will flash.
D. All load movement will stop.
D. All load movement will stop.
317
How should slings and wire rope be stored?
In a dry location off the ground.
318
What should be done with a wire rope sling that has a kink in it?
Destroy and discard it.
319
What should be done if there is a possibility of shock loading when using a wire rope sling?
Take special precautions and/or use a larger size rope.
320
What should be done with a broken wire in a wire rope sling?
Removed as soon as possible.
(By bending the broken ends backwards and forward by hand or with a pair of pliers)
321
Is it safe to replace a lost pin in a shackle with a high-strength bolt?
No.
(The bolt is not designed to support the loads required)
322
Is it safe to repair a slight tear in a synthetic web sling?
No.
(If damage is found, remove the sling immediately)
323
The sound or light signal for "LOWER" is:
A. One bell or flash.
B. Tow bells or flashes.
C. Three bells or flashes.
D. Four bells or flashes[]]
C. Three bells or flashes.
324
The sound or light signal for "STOP" is:
A. One bell or flash.
B. Two bells or flashes.
C. Three bells or flashes.
D. Four bells or flashes[]]
A. One bell or flash.
325
The sound or light signal for "ALL CLEAR" is:
A. One bell or flash.
B. Two bells or flashes.
C. Three bells or flashes.
D. Four bells or flashes[]]
D. Four bells or flashes.
326
The sound or light signal for "RAISE" is:
A. One bell or flash.
B. Two bells or flashes.
C. Three bells or flashes.
D. Four bells or flashes[]]
B. Two bells or flashes.
327
What type of footwear must be worn during material handling?
A. Cowboy boots.
B. Non-skid rubber boots.
C. High leather boots[][][][]
D. Steel-toed work boots.
D. Steel-toed work boots.
328
What type of gloves are not considered safe for handling materials?
A. Rubber gloves.
B. Short-cuff gloves.
C. Leather gloves[][]]
D. Gauntlet-type gloves.
D. Gauntlet-type gloves.
329
If there exists a danger of stepping on protruding nails, what t ype of footwear will protect you from injurty?
A. Steel-toed boots.
B. Cowboy boots[][]]
C. Steel insoles[][][][]]
D. Non-skid rubber soles.
D. Non-skid rubber soles.
330
When a crane starts taking up the slack in the slings around a load, avoid:
A. Standing back from the load.
B. Getting your fingers pinched.
C. Checking the load's balance[]
D. Planning an escape route[][][]
B. Getting your fingers pinched.
331
When moving a suspended load:
A. Pull the load towards yourself.
B. Stand under the load[][][][][][][][]
C. Guide and follow the load[][][]]
D. Stand on the load[][][][][][][][][][]]
C. Guide and follow the load.
332
How should loose material be stored?
A. Tied together.
B. Stacked on shelves.
C. In containers or bins.
D. According to length.
C. In containers or bins.
333
What should be done with faulty equipment?
Examine all hardware, equipment, tackle and slings before using it and destroy defective components.
334
When rigging loose bundles of round stock use:
A. Double-wrapped basket hitches.
B. Two-leg bridle hitch[][][][][][][][][][][]]
C. Four-leg bridle hitch[][][][][][][][][][][]
D. Single-choker hitch[][][][][][][][][][][]]
A. Double-wrapped basket hitches.
335
Tag lines should be used to control loads because they allow control from:
A. Directly under the load.
B. A safe distance[][][][][][][]
C. Above the load[][][][][][][]
D. Within the crane[][][][][]]
B. A safe distance.
336
Padding should be applied to all loads that have:
A. Excessive weight.
B. Slippery surfaces.
C. Irregular surfaces.
D. Sharp corners[][][]
D. Sharp corners.
337
When using cranes or hoists to roll or turn heavy structural shapes, you must avoid:
A. Slow, steady pulls.
B. Total control[][][][][]]
C. 90° turns[][][][][][][][]
D. Violent movements.
D. Violent movements.
338
If you are using cross-sticks to stabalize a pile, you must place the cross-sticks directly over:
A. Center.
B. Supports.
C. Existing cross-sticks.
D. The balance point[][]
C. Existing cross-sticks.
339
When lifting with a sling, you must make sure that the sling is long enough so that the angle formed by the sling from the horizontal is always greater than:
A. 30°.
B. 40°.
C. 45°.
D. 60°.
D. 60°.
340
What type of rope is suitable for using as a tag line?
Polypropylene.
341
What type of synthetic fiber rope conducts electricity when it gets wet?
Nylon.
342
How long should a tag line be?
Long enough so that the worker guiding the load can do so without being in danger.
((Needs to be long enough so that load can be controlled before it is near obstacles))
343
Where should a tag line be attached to a long load?
Near one end.
(Trusses should use two tag lines, one at each end)
344
Where should the worker stand if they are guiding a load of trusses onto a roof?
Out from under the load at a safe distance.
345
What is the minimum width of a wooden scaffold plank?
A. 140mm (5 1/2").
B. 184mm (7 1/4").
C. 235mm (9 1/4").
D. 286mm (11 1/2").
C. 235mm (9 1/4").
346
What is the minimum height of a guardrail?
A. 600mm (24").
B. 750mm (30").
C. 900mm (36").
D. 1020mm (40").
D. 1020mm (40").
347
Above what height does a scaffold require a guardrail?
A. 1200mm (4').
B. 2100mm (7').
C. 2400mm (8').
D. 3000mm (10').
D. 3000mm (10').
348
What is the maximum force that a guardrail is required to resist?
A. 445 N (100 lbs).
B. 550 N (125 lbs).
C. 890 N (200 lbs).
D. 1113 N (250 lbs).
B. 550 N (125 lbs).
349
What is the maxium slope, vertical to horizontal, that is allowed for a work platform?
A. 1:3.
B. 1:5.
C. 1:6.
D. 1:10.
B. 1:5.
350
What is the maxium gap allowed under a toe-board?
A. None.
B. 6 mm (1/4").
C. 13 mm (1/2").
D. 19 mm (3/4").
C. 13 mm (1/2").
351
What is the minimum width allowed for a work platform?
A. 1 plank width.
B. 2 plank widths.
C. 600mm (24")[][]
D. 750mm (30")[][]
B. 2 plank widths.
352
What is the minimum amount that a scaffold plank may project beyond its supports?
A. 100mm (4").
B. 150mm (6").
C. 200mm (8").
D. 300mm (12").
B. 150mm (6").
353
What is the maximum spacing allowed for the supports of scaffold planks if the scaffold is to be used by a bricklayer?
A. 1800mm (6').
B. 2100mm (7').
C. 2400mm (8').
D. 3000mm (10').
B. 2100mm (7').
354
What are the two basic structural components of steel scaffolding?
A. Screw jack and end frame.
B. Coupler pin and cross-brace.
C. End frame and cross-brace[][][]
D. Plank and end frame[][][][][][][][]]
C. End frame and cross-brace.
355
True or False?
## Footnote
Bolts or pins must be placed through the end frames and coupler pins when the scaffold is higher than one unit.
True.
356
Casters for steel scaffolds must have:
A. Rubber tires.
B. Ball bearings.
C. Levelling screws.
D. Brakes[][][][][][][][][]]
D. Brakes.
357
What is the maxium height of a rolling scaffold?
A. 2 times it's minimum base dimension.
B. 2 1/2 times it's minimum base dimension.
C. 3 times it's minimum base dimension[][][]]
D. 3 1/2 times it's minimum base dimension.
C. 3 times it's minimum base dimension.
358
Steel scaffolds fitted with casters also require:
A. Sway braces.
B. Screw jacks[]
C. Base plates[]]
D. Mud sills[][][]]
A. Sway braces.
359
What must be used to level a scaffold on uneven terrain?
A. Panels.
B. Screw jacks.
C. Bricks[][][][][][]
D. Building blocks.
B. Screw jacks.
360
What is required when placing an end frame on a wooden mud sill?
A. Screw jack.
B. Sway brace.
C. Base plate[]]
D. Bolts through the coupling pins.
C. Base plate.
361
What is the maxium allowed height for a rolling scaffold which is being moved by workers on the scaffold?
A. At all times.
B. When workers are more than 1 1/2 times the min base dimension above ground.
C. When workers are more than 2 times the min base dimension above ground[][][]
D. When workers are more than 3 times the min base dimension above ground[][]]
B. When workers are more than 1 1/2 times the min base dimension above ground.
362
What is the maximum allowed slope of the floor when using a rolling scaffold?
A. None, the floor must be flat.
B. Within 3° of level[][][][][][][][][][]
C. Within 5° of level[][][][][][][][][][]
D. Within 10° of level[][][][][][][][][]
B. Within 3° of level.
363
What is the maximum allowed height for a rolling scaffold which is being moved by workers other than those on the scaffold?
A. None, workers are nver allowed on a moving scaffold.
B. 1/2 times the minimum base dimension[][][][][][][][][][][][][]]
C. 2 times the minimum base dimension[][][][][][][][][][][][][][][]
D. 3 times the minimum base dimension[][][][][][][][][][][][][][][]
C. 2 times the minimum base dimension.
364
The type of finish for a wooden ladder is:
A. Oil-based paint.
B. Latex paint[][][][]]
C. Solid color stain.
D. Clear finish[][][][]]
D. Clear finish.
365
Which of the following ladders is freestanding?
A. Extension.
B. Step[][][][][]
C. Single[][][]]
D. Fixed[][][][]
B. Step.
366
A full body harness attached to a life line must be used when working on a ladder-jack scaffold higher than:
A. 2.1m (7').
B. 2.4m (8').
C. 3m (10')[]
D. 4.9m (16').
C. 3m (10').
367
The minimum width of a lumber plank used for a ladder-jack scaffold is:
A. 235mm (9 1/4").
B. 286mm (11 1/4").
C. 350mm (14")[][][]
D. 406mm (16")[][][]
B. 286mm (11 1/4").
368
Center-to-center spacing of the cleats on a single ladder is:
A. 250 mm (10").
B. 300 mm (12").
C. 350 mm (14").
D. 400 mm (16").
B. 300 mm (12").
369
The correct slope for a single or extension ladder is:
A. 1 up the slop of the ladder to 4 horizontal.
B. 2 up the slope of the ladder to 4 horizontal.
C. 3 up the slope of the ladder to 1 horizontal[]
D. 4 up the slope of the ladder to 1 horizontal[]
D. 4 up the slope of the ladder to 1 horizontal.
370
Minimum size for the side rail of a 3 m (10'), job-built single ladder is:
A. 38 x 38 mm (2 x 2).
B. 38 x 64 mm (2 x 3).
C. 38 x 89 mm (2 x 4).
D. 38 x 140 mm (2 x 6).
C. 38 x 89 mm (2 x 4).
371
The minimum distance that a single or extension ladder is required to project above the level to which it gives access is:
A. 500 mm (20").
B. 600 mm (2')[][]
C. 1 000mm (3')[]
D. 1 200 mm (4').
C. 1 000mm (3').
372
The maxium allowable distance between supports for a manufactured plank used in a ladder-jack scaffold is:
A. 2.4 m (8').
B. 3.0 m (10').
C. 4.9 m (16').
D. 7.3 m (24').
D. 7.3 m (24').
373
The maximu depth allowed for notches in the side rails of a job-built ladder is:
A. None.
B. 13 mm (1/2").
C. 25 mm (1")[]]
D. 38 mm (1 1/2").
A. None.
374
Referring to the figure below, the knot, hitch, or bend illustrated is a:
A. Carrick bend.
B. Timber hitch.
C. Clove hitch[]]
D. Trucker's knot.
C. Clove hitch.
375
Referring to the figure below, the eye bolt illustrated is a:
A. Round eye bolt.
B. Shoulderless eye bolt.
C. Long-shanked eye bolt.
D. Washerless eye bolt[][]]
B. Shoulderless eye bolt.
376
Referring to the figure below, which number is "USE THE MAIN LINE"?
9.
377
Referring to the figure below, which number is "STOP"? (Two signals)
2.
17.
378
Referring to the figure below, which number is "RETRACT BOOM"?
6.
379
Referring to the figure below, which number is "LOWER THE LOAD"?
3.
380
Referring to the figure below, which number is "HOIST SLOWLY"?
10.
381
Referring to the figure below, which number is "LOWER THE BOOM AND RAISE THE LOAD"? (Two signals)
14.
15.
382
Referring to the figure below, which number is "EXTEND THE BOOM"?
5.
383
Referring to the figure below, which number is "USE WHIP LINE"? (Two signals)
1.
12.
384
Referring to the figure below, which number is "SWING THE BOOM"?
4.
385
Referring to the figure below, which number is "RAISE THE BOOM AND LOWER THE LOAD"? (Two signals)
7.
11.
386
Referring to the figure below, which number is "HOIST"?
8.
387
Referring to the figure below, which number is "LOWER THE BOOM"?
13.
388
Referring to the figure below, which number is "DOG EVERYTHING"?
18.
389
The combination square contains a spirit level in it's:
A. Square head.
B. Bevel head[][]
C. Protractor head.
D. Fixed head[][][][]]
A. Square head.
390
The formula for finding the area of a rectangle is:
A. Dia x Dia x 0.7854.
B. L x W[][][][][][][][][][][][]
C. L x W x H[][][][][][][][]]
D. Dia x Dia x 0.7854 x H.
B. L x W.
391
The smallest graduation on a metric pocket tape are:
A. Half millimeters.
B. Millimeters[][][][]]
C. Centimeters[][][]]
D. Decimeters[][][]]
B. Millimeters.
392
Which of the layout tools listed below is the best to use as a straight edge?
A. Pocket tape.
B. Outside caliper.
C. Center punch[]]
D. Steel rule[][][][][]
D. Steel rule.
393
The formula for finding the area of a circle is:
A. Dia x Dia x 0.7854.
B. L x W[][][][][][][][][][][][]
C. L x W x H[][][][][][][][]]
D. Dia x Dia x 0.7854 x H.
A. Dia x Dia x 0.7854.
394
A center punch has a tip that is ground to an included angle of:
A. 30°.
B. 45°.
C. 60°.
D. 90°.
D. 90°.
395
True or False?
The imperial system uses meters and millimeters for measurement.
False.
396
The imperial system of measurement uses the following measurements:
A. Millimeters.
B. Meters[][][][]]
C. Inches and feet.
D. Inches and millimeters.
C. Inches and feet.
397
A meter contains:
A. 10 millimeters.
B. 100 millimeters.
C. 1000 millimeters.
D. 10 000 millimeters.
C. 1000 millimeters.
398
True or False?
The hook end of a pocket tape is fixed and cannot move.
False.
399
Which type of measurement instrument has a ring and hook combination at the starting end?
A. Combination square.
B. Pocket tape[][][][][][][][]
C. Zigzag tape[][][][][][][][]
D. Steel tape[][][][][][][][][]]
D. Steel tape
400
True or False?
A chalk line case uses powdered chalk to mark a line.
True.
401
A large square measuring 400 mm by 600 mm is called a:
A. Combination square.
B. Try square[][][][][][][][][]]
C. Rafter and framing square.
D. Sliding T bevel square[][][]]
C. Rafter and framing square.
402
True or False?
A try square has a sliding head that can be used to lay out 90° and 45° angles.
False.
403
True or False?
When using the hand level over a long distance, the level should not be reversed end to end.
False.
404
True or False?
A torpedo level is used in the piping trades.
True.
405
True or False?
A plumb bob can touch the floor when it is suspended.
False.
406
True or False?
Soapstones are used in pipe fabrication.
True.
407
Name three piping materials that can be joined using a threaded joint.
Brass.
Copper.
Plastic[]
408
Describe the advantage of standardization of pipe threads.
Pipe can be manufactured and threaded in one country and the fittings for the same pipe produced in another country.
409
What does ASPT stand for?
American Standard Pipe Thread.
410
What does NPS stand for?
Nominal Pipe Size.
411
What does APS stand for?
Actual Pipe Size.
412
What does OD stand for?
Outside Diameter.
413
What does ID stand for?
Inside Diameter.
414
The exterior thread on a pipe or fitting is called a?
Male thread.
415
The internal thread on a fitting or valve is called a?
Female thread.
416
The number of threads per inch is referred to as the?
Thread pitch.
417
The thread angle on an American Standard Pip Thread is?
60°.
418
A long thread that dos not have any taper is called a?
Running thread.
419
A left and right nipple and coupling may be used in place of a?
Union coupling.
420
The amount of pipe thread necessary to make a tight connection between pipe and fitting is the definition of?
Thread engagement.
421
List four nominal pipe diameters that can be threaded with the same die chasers.
1 inch.
1 1/4 inch.
1 1/2 inch.
2 inches.
422
The number of threads per inch for nominal pipe diameters over 2 1/2 inch is?
8.
423
Allen screws are tightened or loosened with a wrench known as a(n):
A. Allen wrench.
B. Socket wrench.
C. 12-point wrench.
D. Adjustable wrench.
A. Allen wrench.
424
A wrench that has a box-end at one end and an open-end at the other is known as a(n):
A. Doubly duty wrench.
B. Double ended wrench.
C. Open-box wrench[][][][]]
D. Combination wrench[]]
D. Combination wrench.
425
The size of an adjustable wrench is designated by it's:
A. Jaw length.
B. Jaw opening.
C. Total weight[]
D. Overall length.
D. Overall length.
426
All hand tools should be:
A. Kept clean.
B. Varnished occasionally.
C. Greased regularly[][][][][]]
D. Soaked in solvent after each use.
A. Kept clean.
427
Allen or hexagon key wrenches:
A. Must be discarded when they show signs of wear.
B. Can be reconditioned by grinding the worn edge off.
C. Can be bent into shape to suit a particular job[][][][][][]]
D. Are only available in imperial[][][][][][][][][][][][][][][][][][][][][][]
B. Can be reconditioned by grinding the worn edge off.
428
The wrench that provides the best grip on the fastener is the:
A. Open-end wrench.
B. Box-end wrench[][]
C. Adjustable wrench.
D. Crescent wrench[]]
B. Box-end wrench.
429
True or False?
The wrench that should be used on fittings is the open-end wrench or the adjustable wrench.
False.
430
True or False?
The socket square drive is measured in inches on both metric and imperial sockets.
True.
431
Why should a pipe wrench never be used on a hardened surface?
A hardened material will scratch or damage the teeth on a pipe wrench.
432
The size of pliers is determined by the:
A. Length of the handle.
B. Width of the jaw opening.
C. Length of the jaw[][][][][][][]]
D. Overall length[][][][][][][][][][]
D. Overall length.
433
Interlocking slip-joint pliers are also known as:
A. Vise-grip pliers.
B. Water pump pliers.
C. Side grip pliers[][][]
D. Oil pump pliers[][]]
B. Water pump pliers.
434
The only pliers that are suitable for holding items together are:
A. Combination slip-joint pliers.
B. Needle-nose pliers[][][][][][][][]]
C. Side-cutter pliers[][][][][][][][][][]
D. Straight jaw vise-grip pliers[]
D. Straight jaw vise-grip pliers.
435
What kind of back does a skewback saw have?
A. Straight.
B. Crooked.
C. Heavily curved.
D. Sligthly curved.
D. Sligthly curved.
436
True or False?
The number stamped or printed on a saw indicates the number of teeth per 25 mm or inch.
False.
437
True or False?
The teeth of a crosscut saw act as tiny chisels when they cut into wood.
False.
438
True or False?
There is no difference between the number of points and the number of teeth per 25 mm.
False.
439
The numbers 1218 printed on a hacksaw blade indicate:
A. 18" long and 12 teeth per inch.
B. 8" long and 121 teeth per inch.
C. 12" long and 18 teeth per inch[]
D. The date of manufacture - 12th month 18th day.
C. 12" long and 18 teeth per inch.
440
The teeth of a hacksaw blade always have a small amount of set to allow for:
A. Ease of starting the cut.
B. Blade clearence through the cut.
C. Protection of the teeth[][][][][][][][][]]
D. Ejection of the waste[][][][][][][][][][]]
B. Blade clearence through the cut.
441
True or False?
Al hand-operated hacksaws use flexible blades.
False.
(Blades can be all hard or flexible types)
442
When storing a hacksaw in a toolbox, you should protect the:
A. Blade.
B. Handle.
C. Other tools.
D. Adjusting screw.
A. Blade.
443
True or False?
Always file on the forward stroke and raise the file on the backstroke to prevent damage.
True.
444
The length of a file is measured:
A. From end to end.
B. From heel to tang.
C. From point to heel.
D. Along the length covered by teeth.
C. From point to heel.
445
A smoother cut can be obtained from a file that is:
A. Single cut.
B. Doulbe cut.
C. Round[][][][]]
D. Thre square.
A. Single cut.
446
To prevent files from becoming clogged with metal, you should:
A. Soak them in water.
B. Soak them in gasoline.
C. Coat them with chalk[]]
D. Drag them on the backstroke.
C. Coat them with chalk.
447
Files that are clogged with waste material can be cleaned with:
A. A file comb.
B. A hardened steel pick.
C. Soap and water[][][][][][]]
D. A file card[][][][][][][][][][][]]
D. A file card.
448
Screwdrivers should be used to:
A. Open cans.
B. Pry[][][][][][][]]
C. Scrape[][][][]
D. Turn screws.
D. Turn screws.
449
Screws with a single slot should be turned with a:
A. Torx screwdriver.
B. Blade screwdriver.
C. Phillips screwdriver.
D. Robertson screwdriver.
B. Blade screwdriver.
450
Phillips screwdrivers are available in sizes:
A. 1, 2, 3 and 4.
B. 3/32", 1/8", 3/16", and 1/4".
C. A, B, C, and D[][][][][][][][][][]
D. 0, 00, 001, and 002[][][][]]
A. 1, 2, 3 and 4.
451
If the tip of a blade screwdriver is rounded, it will tend to:
A. Protect the screw head.
B. Climb out of the slot[][][]]
C. Fit a larger variety of screw sizes.
D. Require less force[][][][][][][][][][][][][][]
B. Climb out of the slot.
452
The size of a screwdriver is indicated by the:
A. Overall length of the driver.
B. Width of the tip[][][][][][][][][][][]
C. Length of the blade[][][][][][][]]
D. Size of the screw the driver fits.
C. Length of the blade.
453
Which screwdriver sets and removes screws when you push down on it's handle?
A. Ratchet screwdriver.
B. Spiral-ratchet screwdriver.
B. Spiral-ratchet screwdriver.
454
C-clamps:
A. Exert only a limited amount of pressure.
B. Do not require the use of protective padding.
C. Are useful for small tight areas[][][][][][][][][][][][][][]
D. Are also known as cabinet clamps[][][][][][][][][][]
C. Are useful for small tight areas.
455
To protect your work piece when using a bench vise, you should:
A. Grip it as tightly as possible to prevent movement.
B. Use soft vise jaw-clamps[][][][][][][][][][][][][][][][][][][][][][][][]
C. Grip it very lightly to prevent damage to the piece.
D. Grip your work piece by the corners[][][][][][][][][][][][]]
B. Use soft vise jaw-clamps.
456
The size of vise is usually measured by the:
A. Height of the jaws from the bench surface.
B. Overall weight of the vise[][][][][][][][][][][][][][][]
C. Width of the vise jaws[][][][][][][][][][][][][][][][][][]]
D. Length of the vise handle[][][][][][][][][][][][][][][]
C. Width of the vise jaws.
457
When hammering on a work piece in a vise, you should always drive:
A. Toward the stationary jaw.
B. Toward the moveable jaw.
C. Down toward the bench[]]
D. On either side of the vise.
A. Toward the stationary jaw.
458
When precision drilling on a drill press, the machine vise should be:
A. Held firmly with the left hand.
B. Held firmly with both your hands.
C. Held firmly by a helper[][][][][][][][][]]
D. Bolted or clamped firmly to the drill press table.
D. Bolted or clamped firmly to the drill press table.
459
True or False?
For extra holding power, you should use a 60 cm (24") length of pipe to tighten a vise handle.
False.
(Never overtighten a vise handle with an extension bar)
460
The framing hammer usually weighs:
A. Under 370 grams.
B. 570 to 680 grams.
C. Over 900 grams[]]
B. 570 to 680 grams.
461
Which type of hammer should you use to pull nails?
A. Straight claw.
B. Curved claw[]
B. Curved claw.
462
When nailing boards to lumber thicker than the boards, how long should the nails be?
A. Twice the thickness of the board.
B. Half the thickness of the board[][]]
C. Three times the thickness of the board.
D. One and one-half times the thickness of the board.
C. Three times the thickness of the board.
463
True or False?
A sledge hammer should not be used to drive stakes or drift pins.
False.
464
True or False?
The ball-peen hammer is used to round over bolt threads or rivets.
True.
465
A bar that has a hook at one end and is about 750 mm long is called a:
A. Wonder bar.
B. Wrecking bar.
C. Crowbar[][][][]]
D. Lining bar[][][]
B. Wrecking bar.
466
A long, heavy bar with a wedge point for digging or stripping forms is called a:
A. L stripping bar.
B. Crowbar[][][][][]]
C. Lining bar[][][][]
D. Wonder bar[][]]
B. Crowbar.
467
A bar that is used for most general work and for stripping concrete forms is called a:
A. Wonder bar.
B. Lining bar[][]
C. Crowbar[][][]
D. Wrecking bar.
D. Wrecking bar.
468
A good quality ball-peen hammer is made from:
A. Drop-forged stainless steel.
B. Cast alloy steel[][][][][][][][][][][]]
C. Drop-forged alloy steel[][][][]
D. Cast iron alloy[][][][][][][][][][][][]
C. Drop-forged alloy steel.
469
A ball-peen hammer size is classified by the:
A. Length of the handle.
B. Length of the head[][]
C. Weight of the head[][]
D. Weight of the entire hammer.
C. Weight of the head.
470
A cracked hammer handle must be:
A. Replaced.
B. Taped up to prevent slivers.
C. Used for light hammering only.
D. Soaked to close the crack[][][][]
A. Replaced.
471
The rigid punch that will start an object moving without causing it to swell is a:
A. Slim-line punch.
B. Center punch[][]
C. Prick punch[][][]]
D. Taper punch[][][]
D. Taper punch.
472
True or False?
A low velocity tool must be used unless no low-velocity tool is capable of doing the fastening task.
True.
473
If a powder actuated tool misfires, the operator must hold the tool firmly against the work surface for at least __ seconds.
A. 15.
B. 10.
C. 5[]
D. 0[]
C. 5.
474
A powder-actuated tool fastener must not be driven into steel within ____ of an edge.
A. 26 mm.
B. 20 mm.
C. 16 mm.
D. 13 mm.
D. 13 mm.
475
A low-velocity, powder-actuated tool fastener may not be driven into masonry materials within _____ of an unsupported edge.
A. 25 mm.
B. 50 mm.
C. 75 mm.
D. 100 mm.
C. 75 mm.
476
True or False?
A powder-actuated tool must not be used in an explosive or flammable atmosphere.
True.
477
A powder-actuated tool fastener must not be driven into steel within _____ of a weld.
A. 25 mm.
B. 50 mm.
C. 75 mm.
D. 100 mm.
B. 50 mm.
478
True or False?
A powder-actuated tool must not be pointed at any person.
True.
479
At what speed does the fastener move in a low-velocity, powder actuated tool?
Less than 100m (330ft).
480
At what speed does the pin move when a high-velocity tool is used?
460m (1500ft)
481
What device does a low-velocity tool have that is not found in a high-velocity tool?
Captive piston.
482
Which type of powder-actuated tool is most commonly used in the piping industry?
Hilti low-velocity tool.
483
Besides the captive piston, what are the two safety features of the low-velocity, powder-actuated tool?
A built-in stop ring to absorb impact of firing the tool.
Designed so that it will not fire if held at angle of more than 70° off the work surface.
484
What cartridge colour produces the second strongest impact?
Red.
485
Cartridges are available in two shapes. What are they?
Crimped.
Wadded.
486
Some cartridges for powder-actuated tools are center fired. How are other cartridges fired?
Rim fired.
487
Name the colour of Hilti cartridges from strongest to weakest.
1. Purple (Strongest)
2. Red[][][][][][][][][][][][]
3. Yellow[][][][][][][][][][]
4. Green[][][][][][][][][][]
5. Brown[][][][][][][][][][]
6. Grey (Weakest)[][]
488
When selecting a cartridge for a fastening job, what cartridge do you start with?
Start with the cartridge that has the weakest powder load.
489
True or False?
For fastening into concrete, the tip of the pin must be knurled.
False.
490
True or False?
The washer of a fastener must fit snugly into the tool's chamber.
True.
491
True or False?
Any Hilti tool will accept any kind of fastener.
False.
(The tool uses only fasteners that are designed for it)
492
What must be remembered about the number code on the piston and the nuber code on the nail?
The nail to be used with the tool must bear a number that matches the number code on the piston.
493
About how much penetration is requred for fastening into concrete?
About 25mm (1")
494
Where must a fastening be made into a concrete block?
Into the solid part of the block.
(At least 75mm (3") away from the edge of the block)
495
What is the minimum thickness of steel a fastener may be used on?
5mm (3/16")
496
.What penetration should the tool operator look for when setting a fastener into steel?
12mm (1/2")
497
What is the minimum distance you may set a fastener from a torch cut or weld?
50mm (2")
498
What type of concrete products should not accept a powder-actuated fastener?
Precast concrete containing prestressed cables.
499
What is the rule about spalled areas?
Never use a powder-actuated tool on a spalled surface.
500
List five materials that cannot be fastened onto concrete or steel?
Asbestos.
Brick[][][][]]
Ceramic Tile.
Glass[][][][][][][]
Vitrified Tile.
501
Name a principal advantage of the bench-mounted or portable chain vise?
Both vises distribute gripping pressure evenly around the pipe wall.
502
What is the maximum pipe capacity of the portable tri-stand chain vise?
5".
503
What vise would you select if you wanted to clamp a vise to a 100 mm (4") plank?
Portable Kit Yoke Vise.
504
If a tradesperson is required to attach a vise to an overhead pipe with a diameter of 5", which vise would be suitable for the purpose?
Top Screw Post Chain Vise.
505
What kind of vise comes with two pairs of legs and uses a connecting pipe?
Top Screw Stand Chain Vise.
506
Name the bench-mounted vise that is used for holding long lengths of pipe and has a maximum pipe size capacity of 4".
Open Side Vise.
507
Name the vice that holds and aligns pipe for tacking and is used on mains and risers.
Straight Pipe Welding Vice.
508
What are pipe taps used for?
To cut or restore internal pipe threads.
509
What are dies used for?
To cut external threads on pipe (or rods).
510
What is ment by a receding die?
The width of the die is less than the length of the thread to be cut.
511
What is ment by a full-width die?
The width of the die is equal to the length of the thread to be cut.
512
Name the threader which uses more than one set of dies, is often preferred for small jobs, and threads pipe sizes up to 2".
Exposed Ratchet Drop Head Threader.
513
Name a threader that could be used effectively with power equipment to cut an external thread on 2 1/2" pipe.
Geared Pipe Threader.
514
Name a threader that uses one set of dies to thread pipe between 1" to 2".
Ratchet Threader.
(Jam-proof)[][][][][]]
515
Name the two major classifications of cutters.
Wheel cutter.
Combined wheel-and-roller cutter.
516
When selecting a cutter wheel for a cutting tool, what three important things should be checked with regard to the cutter wheel?
1. Designed for the tool being used.
2. Not blunted or damaged[][][][][][][]]
3. Suited for the material to be cut[]
517
Which type of cutter is used with a power vise?
Wide Roll Pipe Cutter.
518
What type of cutter uses a chain for cutting cast iron pipe?
Soil pipe cutter.
519
What is the pipe capacity of the 4-wheel pipe cutter?
From 3/4" to 2" pipe for one type.
From 2 1/2" to 4" for another type.
520
What is a special advantage offered by a 4-wheel pipe cutter?
Useful for cutting pipe in tight work areas.
521
What is the purpose of a reamer?
To remove the burr from the inside diameter (surface) of a pipe.
522
At what stage of a threading operation is reaming done?
After cutting or drilling and before threading.
523
What type of reamer would be selected for use with a power vise or threading machine?
Straight Fluted Ratchet Reamer.
524
Up to what size pipe can you ream with a spiral reamer?
4".
525
True or False?
If you were reaming a pipe set up in a power vise, you should not use a hand-held spiral reamer.
True.
526
Name the wrench that multiplies the turning force and is idea for loosening seized joints.
Compound Leverage Wrench.
527
Name the wrench that has almost completely replaced the monkey wrench and is ideal for tightening nuts and bolts on flanged fittings and valves.
Adjustable Wrench.
528
To which family of wrenches does the spud wrench belong?
Flat-Jawed Wrenches.
529
Name the standard wrench with an angled opening.
End Pipe Wrench.
530
Name the standard wrench that has a jaw opening parallel to the handle and a narrow hook jaw head.
Heavy-Duty Offset Pipe Wrench.
531
Name the wrench specially designed for polished pipe.
Strap Wrench.
532
Describe two features of the basin wrench.
Spring-loaded jaws for one-hand ratcheting.
Tension plug that holds the had of the tool at any angle up to 90°.
533
Name three uses for thread cutting oil.
Cool the tool and the work piece.
Flush away metal chips[][][][][][][][]]
Lubricate the thread cutter during the threading operation.
534
Name two variations of equipment used to dispense thread cutting oil.
Hand pump.
Oiling unit[]]
535
True or False?
Thread cutting oil can be used as lubrication for threading and servicing hand tools.
False.
536
True or False?
Thread cutting oil is used only during the thread-forming process.
True.
537
Referring to the figure below, which dimension correctly indicates thread pitch?
A. A.
B. B.
C. C.
D. D.
A. A.
538
Referring to the figure below, which is the correct way to wind up a steel tape?
A. Method A.
B. Method B.
A. Method A.
539
Referring to the figure below, the screw head illustrated below is a:
A. Phillips head.
B. Robertson head.
C. Torx head[][][][][][]
D. Star head[][][][][][]
C. Torx head.
540
Referring to the figure below, name the parts of the screwdriver shown.
A.
B.
C.
D.
E.
F.
A. Tip.
B. Blade.
C. Ferrule.
D. Head[]]
E. Handle.
F. Length of blade.
541
Referring to the figure below, which illustrations of slot driver tips and screws depict a correct fit?
C.
D.
542
Referring to the figure below, identify the screwdriver tips shown.
A.
B.
C.
D.
E.
A. Robertson.
B. Slot[][][][][][]]
C. Phillips[][][]]
D. Clutch[][][][]
E. Torx[][][][][][]
543
Referring to the figure below, identify the vises.
A. Open Side Vise.
B. Angle Pipe Welding Vise.
C. Top Screw Bench Chain Vise.
D. Portable Tri-Stand Yoke Vise.
E. Bench Yoke Vise[][][][][][][][][][]]
F. Straight Pipe Welding Vise[][]
G. Portable Kit Yoke Vise[][][][][]]
544
Referring to the figure below, identify the threaders shown.
A.
B.
C.
D.
A. Quick-Opening Threader.
B. Jam-Proof Ratchet Threader.
C. Ratchet Drop Head Threader.
D. Geared Pipe Threader[][][][][][]
545
Referring to the figure below, identify the cutters shown.
A.
B.
C.
D.
E.
A. Heavy-Duty, Four-Wheel Pipe Cutter
B. Hinged Pipe Cutter[][][][][][][][][][][][][][][][]
C. Heavy-Duty Cutter, Single Wheel-And-Roller Convertible To Three-Wheel Cutter
D. Wide Roll Cutter[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
E. Soil Pipe Cutter[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
546
What meaning would the initials PRV have other than "pressure-reducing valve"?
Pressure-relief valve.
547
How does a pressure reducing valve work?
Opens or closes to admit more or less water as demanded by a fixture.
548
What are some applications for PRVs in a plumbing system?
Reduce high municipal main pressure to an acceptable operating range.
Supply pressure to low operated fixtures and appliances[][][][][][][][][][][][][][]]
Supply pressure to domestic hot water heating boilers and storage tanks.
549
Why must a strainer be installed on the main or high pressure side of a PRV?
To prevent any dirt from becoming lodged between the PRV seat and disk.
550
Why should a pressure-relief valve be installed on the house side of a PRV when it is used in the supply to a heating boiler?
Drop pressure to boiler.
551
Explain "No-flow pressure"
The pressure maintained in the system by a reducing valve when no water is flowing.
552
Explain "Reduced pressure fall-off"
The change in the reduced flow pressure below the no-fow pressure which is needed to open the valve.
553
Explain "Reduced flow pressure"
The pressure maintained by the valve when water is flowing.
554
Explain "Series" - Relative to PRV installations.
Two or more valves are installed in a line.
(A.k.a two-stage or multi-stage reduction)
555
Explain "Parallel" - Relative to PRV installations.
Two or more valves are installed to serve the needs of one large supply main.
556
Explain why a series installation of PRVs might be necessary.
To allow for pressure reduction capacity greater than the reduction capabilities of a single valve.
557
Explain why a parallel installation of PRVs might be necessary.
In order to allow the use of two smaller, cheaper valves instead of one large, expensive valve.
558
Why might one PRV in a parallel installation be set at a higher opening pressure than the other?
To prevent both valves from operating during low demand periods.
559
Explain what is ment by the term "domestic" hot water.
Intended to serve domestic needs such as cooking, dishwashing, laundry.
560
Is the water in a domestic hot water tank under pressure? If so, what pressure?
Yes.
Same pressure as the water main.
(Assuming the absence of a pressure-reducing valve)
561
State the working and test pressures for a domestic hot water tank.
Working Pressure: 127.5 PSI
Test Pressure[][][][]: 300 PSI[]
562
State two reasons for installing a control valve on the cold supply to a tank.
Turn off water to the tank should it be necessary to drain it or replace it.
## Footnote
Turn off and therefore isolate the hot water supply piping to carry out such repairs as faucet washer replacement without turning off the water to the entire building. If cold water cannot get into the tank, hot water will not get out.
563
Explain why the cold water must always enter near the bottom of the tank.
To ensure that cold water is not mixed with the hottest water at the top of the tank.
564
Explain the term "sacrificial anode."
A magnesium rod used to help reduce corrosion of the tank by gradually corroding itself (instead of the tank).
565
Name three materials that can be applied to the inside of the tank wall as a protective coating against corrosion.
Galvanizing.
Glass[][][][][][]
Stone[][][][][]]
566
The two types of electric heaters are?
Immersion type.
Strap on[][][][][][][]
567
Explain why a temperature and pressure-relief valve is installed on a hot water tank.
To provide protection against uncontrolled temperature and/or pressure.
568
The two main tank types are designed to heat up by ___ or \_\_\_\_\_\_\_\_.
Gas.
Electricity.
569
State two advantages of an electrically-heated tank.
Noisless heating.
No heat lost in transfer to the water.
570
State two advantages of a gas heated tank.
Relatively high recovery rate when all of the hot water is drawn off.
The tank size can be generally smaller than an electric tank for the same service.
571
How can a cost comparison be made between gas and electricity as a heating source?
It is the number of BTUs being paid for that determines the cost factor.
572
Name four areas of domestic hot water tank installation on which the current BC Plumbing Code rules.
Pressure Requirements.
Safety (The provision and location of safety devices including valves and controls)
The quality of tank manufacture[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
The termination of a drain pipe from a safety valve[][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
573
Name seven essential operating parts of the temperature and pressure-relief valve.
Extension Thermostat.
Pop Action Construction.
Spring[][][][][][][][][][][][][][][][][]
Temperature Sensing Zone.
Test Lever[][][][][][][][][][][][][][][][]
Thermostat[][][][][][][][][][][][][][][]
574
Explain the function of the temperature-sensing element.
Activates the relief mechanism and permits the extremely hot water to escape.
575
Explain the function of the temperature relief on a temperature-and-pressure-relief valve.
When the tank temperature approaches the danger zone (210°F), the thermostat expands and lifts the valve disc from the seat, allowing hot water to escape and cooler water to replace it in the tank.
576
Explain the function of the pressure-relief on a temperature-and-pressure-relief valve.
When the tank pressure approaches the danger zone (150 PSIG), the thermostat expands and lifts the valve disc from the seat, allowing hot water to escape and cooler water to replace it in the tank.
577
Explain the danger should the temperature in a domestic tank reach 212°F or greater.
Flashing of steam at faucets and any outlet in the system.
578
State the standard temperature and pressure settings of a temperature-and-pressure-relief valve.
Pressure = 150 PSIG.
Temperature = 210°F.
579
Explain why the temperature-and-pressure-relief valve should be located on the hot discharge at the top of the tank rather than on the cold supply.
Tank temperature could become considerably hotter than the 210°F standard temperature relief setting because of a possible temperature lag between the valve and the tank.
580
State the boiling points of water when subjected to the following pressures:
50 PSIG.
100 PSIG.
50 PSIG = 297°F.
100 PSIG = 337°.
581
State the location of the PRU sensing element within a hot water tank.
Immersed in the upper 150 mm of water in the tank.
582
State the distance from the floor for the termination of a T & P valve discharge pipe.
Minimum = 6".
Maxium = Specified by regulation.
583
State the diameter of the relief valve discharge pipe.
3/4".
584
Give an accurate definition of the word "soldering."
A process by where two or more pieces of metal are joined by means of an alloy that has a lower melting point than the metals being joined.
585
The term used when a soldered joint lets go under stress is defined as?
Creep.
586
The term used to describe solder being drawn into a solder joint is ______ action.
Capillary.
587
Capillary action depends on the joint having a fairly ____ fit.
Close.
588
Two groups of solder are?
Soft solder.
Hard solder.
589
Solder having alloys that melt below 840°F (449°C) are known as ___ solders.
Soft.
590
When specifying a soft solder, the ___ content is always mentioned FIRST.
Tin.
591
50-50 solder starts to melt at ___ °F and flows freely at ___ °F.
360.
415[]
592
For service temperatures up to 250°F (121°C) where high strength is required, a ___ solder should be used.
95-5.
593
95-5 solder melts at ___ °F and flows freely at ___ °F.
450.
465.
594
Another term for hard soldering is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.
Brazing.
| (Silver Brazing)
595
Sil-Fos solder melts from ____ °F to ____ °F.
1185.
1300.
596
Can Easy-Flo 45 solder be used to join together copper and steel?
Yes.
597
Can Sil-Fos be used on iron or steel? If not, explain why.
No.
(The phosphorus will make the joint brittle)
598
To what group of solder does Easy-Flo 45 belong?
Silver solder.
599
List six steps in the preparation of a soft solder joint.
1. Accurate measurements.
2. Cutting[][][][][][][][][][][][][][][][]
3. Removing burrs[][][][][][][][]
4. Cleaning[][][][][][][][][][][][][][]
5. Fluxing[][][][][][][][][][][][][][][]
6. Assembling[][][][][][][][][][][]
600
At the _____ temperature, the brazing filler rod is completely melted.
Liquidus.
601
The stregth of a brazed joint depends to a large extent on the ________ between the pipe and the copper fitting.
Clearence.
602
If the brazing alloy fails to flow or has a tendency to ball up, it indicates _______ on the metal surfaces.
Oxidation.
603
95-5 solder contains 95% tin and 5% \_\_\_\_\_\_\_.
Antimony.
604
What soft solder would be acceptable for service in contact with potable water?
Non-lead.
605
A _______ oxyacetylene flame is best suited for silver brazing.
Reducing.
606
Any substance or mixture used to promote fusion is the definition of?
Flux.
607
The flux should be ____ at the temperature of molten solder.
Fluid.
608
The selection of flux is dependent on three things.
1. Method of soldering.
2. The condition of the surface.
3. Type of metal to be soldered.
609
Two main types of fluxes are:
1. Corrosive.
2. Non-corrosive.
610
Non-corrosive fluxes mainly have a ______ action, protecting the metal from oxidation.
Covering.
611
Corrosive fluxes are capable of ________ the oxide from the metal.
Removing.
612
Corrosive fluxes should be _________ after the joint has cooled.
Washed off.
613
The flux most frequently used to solder copper tubing is?
Solder paste.
614
One of the fluxes used in silver brazing is?
Borax.
615
Does Sil-Fos require a flux when joining:
1. Copper to copper?
2. Copper to brass[]?
1. No.
2. Yes.
