block A review Flashcards
If 2 inch NPS pipe has an I.D. of 2.067 inches and an O.D. of 2.375 inches, what is its wall thickness?
Select one:
a.
0.154 inches
b.
0.308 inches
c.
0.077 inches
d.
0.137 inches
The correct answer is: 0.154 inches
A pipe has an I.D. of 12 inches and a wall thickness of 3/8 inch. if 1 inch of insulation is to be installed on the pipe with 1 inch clearance to the pipe sleeve what is the minimum I.D. of the sleeve ?
Select one:
a.
17 3/4 inches
b.
12 3/4 inches
c.
16 3/4 inches
d.
14 3/8 inches
1”+ 1” + 3/8” + 12” + 3/8” + 1” + 1” = 16 3/4”
The correct answer is: 16 3/4 inches
If a horizontal pipe 90 feet long requires hangers spaced every 10 feet, how many hangers would be needed, excluding those at each end ?
Select one:
a.
10
b.
9
c.
8
d.
7
The correct answer is: 8
The absolute pressure against a gauge at sea level which is reading 14.73 PSIG is :
Select one:
a.
29.46 PSIA
b.
30 PSIA
c.
29.46 PSIG
d.
14.73 PSIA
Absolute = Gauge + Atmosperic
The correct answer is: 29.46 PSIA
Which of the following metals is lowest on the E.M.F. (electromotive force) series ?
Select one:
a.
Copper
b.
Tin
c.
Magnesium
d.
Gold
The correct answer is: Gold
At what temperature is water most dense ?
Select one:
a.
32 °C
b.
4 °C
c.
0 °C
d.
100 °C
B
If granite has a specific gravity of 2.7, what is its approximate density ?
Select one:
a.
27 pounds per cubic foot
b.
270 pounds per cubic foot
c.
168 pounds per cubic foot
d.
160 pounds per cubic foot
2.7 x 62.4 lbs/f = 168 pounds per cubic foot
The correct answer is: 168 pounds per cubic foot
The metric unit used to indicate mass is :
Select one:
a.
the liter
b.
the meter
c.
the joule
d.
the gram
D
The drafting line that indicates alternating positions, moveable parts or future locations of equipment or piping is a :
Select one:
a.
phantom line
b.
cut line
c.
section line
d.
hidden body line
A
The outside water, sanitary, and storm drain piping is shown on the:
Select one:
a.
site plan
b.
structural plan
c.
mechanical drawings
d.
elevation drawing
A
The valve illustrated is a :Select one:
a.
horizontal flow control valve, screwed
b.
horizontal ball check valve, screwed
c.
horizontal swing check valve, screwed
d.
vertical swing check valve, screwed
C
The valve illustrated is a :Select one:
a.
pressure reducing valve
b.
pressure increasing valve
c.
safety valve
d.
ball valve
Feedback
The correct answer is: pressure reducing valve
The valves illustrated are allSelect one:
a.
straight globe valves
b.
straight ball valves
c.
flanged globe valves
d.
straight gate valves
The correct answer is: straight globe valves
The valves illustrated are all :Select one:
a.
straight gate valves
b.
flanged globe valves
c.
flanged ball valves
d.
flanged gate valves
The correct answer is: straight gate valves
The two fittings shown are :Select one:
a.
flanged gate valves
b.
welded reducing couplings
c.
funnel fittings
d.
flanged reducing couplings
The correct answer is: flanged reducing couplings
This symbol represents :Select one:
a.
a hidden line
b.
a hot water line
c.
a return hot water line
d.
a cold water line
The correct answer is: a cold water line
The name given to a piping drawing submitted after the job is completed, to show the locations of pipes are called :
Select one:
a.
isometric drawings
b.
as-built drawings
c.
installed drawings
d.
site plan drawings
The correct answer is: as-built drawings
If a print is drawn at a scale of 1/4 inch/ft what would the actual length of a pipe be if it was drawn 2 7/8 inches long?
Select one:
a.
11 ft 6 inches
b.
8 ft 7 inches
c.
23 ft 8 inches
d.
18 ft 3 inches
The correct answer is: 11 ft 6 inches
When accurate scale and a more realistic appearance is needed to represent piping system, which of the following would be used ?
Select one:
a.
Triple-line drawings
b.
Double-line drawings
c.
Phantom drawings
d.
Single-line drawings
The correct answer is: Double-line drawings
A 90° fittings drawn isometrically would be represented by an angle of:
Select one:
a.
120 °
b.
90 °
c.
60 °
d.
30 °
A
The proper wrench used to tighten a flat-edged fitting is called a:
Select one:
a.
strap wrench
b.
basin wrench
c.
spud wrench
d.
chain wrench
C
Besides being a safety device, the foot switch used on a power drive is a remote to control:
Select one:
a.
forward-off switch
b.
on-off switch
c.
reverse-off switch
d.
forward-off-reverse switch
B
Shaft bearings on a power vise should be lubricated:
Select one:
a.
only when the bearings dry out
b.
with machine oil
c.
with grease
d.
after each job
C
With a power vise, the only safe reamer to use is a:
Select one:
a.
ratcheting reamer
b.
spiral reamer
c.
fluted reamer
d.
file
C
The type of die head used on a power threader that doesn’t require reversing in order to disengage the pipe is called :
Select one:
a.
ratchet
b.
drop-head
c.
universal
d.
quick opening
D
This tool would be used to center a vertical pipe rising out of the ground, through a sleeve in the slab above it:
Select one:
a.
tape measure
b.
level
c.
transit
d.
plumb bob
D
What is applied to the strap of a strap wrench to keep it from slipping on the work-piece ?
Select one:
a.
Powdered resin
b.
Powdered chalk
c.
Water
d.
A light application of cement
A
A die marked 5/8 nc would be used for threading :
Select one:
a.
brass pipe
b.
plastic pipe
c.
galvanzied pipe
d.
mild steel rod
D
The length of a standard pipe wrench is measured from:
Select one:
a.
the inside of the hook jaw to the end of the handle, with the wrench closed
b.
the inside of the hook jaw to the end of the handle, with the wrench fully open
c.
the face of the heel jaw to the end of the handle
d.
the outside of the hook jaw to the end of the handle
B
The largest screw listed below would be a :
Select one:
a.
#8
b.
#12
c.
#6
d.
#10
B
Left-hand threads on an acetylene fitting are usually recognizable by:
Select one:
a.
the initials LH stamped on the nut
b.
coloring the nut red
c.
coloring the nut green
d.
a line cast around the nut
The correct answer is: a line cast around the nut
The safety device built into an acetylene cylinder is :
Select one:
a.
an excess-flow valve
b.
a double sealed valve
c.
a fusible plug
d.
a relief plug
The correct answer is: a fusible plug
The substance which must always be present in an acetylene cylinder is :
Select one:
a.
acetone
b.
acid
c.
aldehyde
d.
acetate
A
When using a hacksaw, for best performance, how many teeth should be in contact with the work-piece ?
Select one:
a.
Three
b.
Six
c.
One
d.
Ten
The correct answer is: Three
If the firing pin was damaged on a powder actuated tool, it should be:
Select one:
a.
repaired by a person with a current operator’s certificate
b.
replaced with a new tool
c.
repaired by a service person approved by the manufacturer
d.
it may be repaired by any service person, but must be test fired
The correct answer is: repaired by a service person approved by the manufacturer
WHMIS means:
Select one:
a.
Workplace Hazardous Material Information System
b.
Warehouse Hazardous Material Information System
c.
Womens Hazardous Material Information System
d.
Workers Hazardous Material Information System
A
In reference to the WHMIS system,the abbreviation MSDS stands for:
Select one:
a.
Material Safety Data Sheet
b.
Material Safety Database System
c.
Metal Standard Decimal Sheet
d.
Mechanical System Data Sheet
The correct answer is: Material Safety Data Sheet
The minimum number of planks and their dimensions for a working platform shall be :
Select one:
a.
(2) - 2 x 4’s on edge 20 inches apart with 1/4 inch plywood nailed to them
b.
2 planks 1 1/2 inch x 10 inch nominal
c.
1 planks 1 1/2 inch x 10 inch nominal
d.
2 planks 2 inch x 10 inch nominal
The correct answer is: 2 planks 2 inch x 10 inch nominal
Guard rails, when required, shall be placed at :
Select one:
a.
48 inches above the working platform
b.
42 inches above the working platform
c.
36 inches above the working platform
d.
60 inches above the working platform
The correct answer is: 42 inches above the working platform
The maximum height at which a worker can work above ground before requiring guard rails is:
Select one:
a.
15 feet
b.
6 feet
c.
10 feet
d.
5 feet
C
If a ladder is placed against a 20 foot high building which has a two foot overhang how far will the base of the ladder be from the building?
Select one:
a.
6 feet
b.
5 feet
c.
4 feet
d.
7 feet
The correct answer is: 7 feet
Center-punching of concrete is done to :
Select one:
a.
mark the position of a powder-actuated shot
b.
assess the power level needed of a powder-actuated tool
c.
mark a hole for reference measurements
d.
assess the curing progress of concrete
The correct answer is: assess the power level needed of a powder-actuated tool
In assessing the work-piece, you find that it can’t be indented with a powder-actuated nail. What should your reaction be ?
Select one:
a.
Load and fire using the lightest charge
b.
Load and fire using the mid-range charge
c.
Load and fire using the heaviest charge
d.
Do not fire the tool, the work piece is too hard
The correct answer is: Do not fire the tool, the work piece is too hard
A/an _________ is best suited to anchor a piece of machinery to a concrete floor.
Select one:
a.
expansion shield and bolt
b.
toggle bolt
c.
plastic plug
d.
U-bolt
Feedback
The correct answer is: expansion shield and bolt
A safety line should be attached to what part of the safety harness?
Select one:
a.
The bottom
b.
The side
c.
The front
d.
The back
D
Which of the following knots can be used to join two ropes of different diameters ?
Select one:
a.
A clove hitch
b.
A reef knot
c.
A catspaw
d.
A sheet bend
The correct answer is: A sheet bend
A bowline on the bight is tied:
Select one:
a.
with a clove hitch
b.
in the middle of a rope
c.
at the end of a rope
d.
with an underhand loop
The correct answer is: in the middle of a rope
To stop the hoisting of a load the signalman:
Select one:
a.
extends one hand out from the waist area, palm down and moves it forward and backward
b.
waves both hands frantically
c.
waves one hand back and forth over his/her head
d.
extends both hands out from the waist area, palms down, in a rapid motion
The correct answer is: extends one hand out from the waist area, palm down and moves it forward and backward
To prevent a load from swinging, a ____________is used.
Select one:
a.
pipe strap
b.
double cable
c.
tag line
d.
double sling
The correct answer is: tag line
If the hook on a come-along is cracked, it should be
Select one:
a.
the hook must be discarded
b.
brazed then heat treated
c.
left in operation, provided the crack isn’t too large
d.
welded then heat treated
The correct answer is: the hook must be discarded
When lifting a pipe with a crane, how should the tag line be attached to the pipe?
Select one:
a.
With a half hitch
b.
With a sheet bend
c.
With a clove hitch
d.
With a bowline
C
Which drawings should be referenced when determining equipment location?
Select one:
a.
From gridlines on the mechanical drawings
b.
From gridlines on the archictectural drawings
c.
From benchmarks on the structural drawings
d.
From the reference notes on the as builts
The correct answer is: From gridlines on the mechanical drawings
What should-be done prior to an inspection?
Select one:
a.
The piping system should be concealed
b.
The piping system should be flushed
c.
The piping system should be labelled
d.
The piping system should be tested
The correct answer is: The piping system should be tested
When can water-filled plastic pipe be relied on for a fire-stop?
Select one:
a.
If the pressure is under 50 PSIG
b.
Never
c.
Only if multi-family residential
d.
If the pressure is over 50 PSIG
The correct answer is: Never
What would be used to prevent a clevis hanger from crushing the insulation on a chilled water line?
Select one:
a.
Hanger guard
b.
Insulation shield
c.
Hanger shield
d.
Insulation guard
The correct answer is: Insulation shield
What would be the minimum size for a sleeve through a concrete slab if it is to allow for a 3” inside diameter pipe with a 5/16” wall thickness, 1” insulation and a 1/2” annular spacing?
Select one:
a.
6 1/4 inches
b.
5 3/4 inches
c.
4 13/16 inches
d.
6 5/8 inches
The correct answer is: 6 5/8 inches
What type of hanger is used to support multiple pipe lines?
Select one:
a.
Clevis
b.
Riser
c.
Ring
d.
Trapeze
The correct answer is: Trapeze
What is the maximum support spacing for a 6 inch soil-or-waste stack ?
Select one:
a.
3.75 m
b.
3 m
c.
7.5 m
d.
2.5 m
C
Which code covers the requirements for fire stopping within a building?
Select one:
a.
National Building Code
b.
National Plumbing Code
c.
National Fire Protection Code
d.
National Mechanical Code
Feedback
The correct answer is: National Building Code
What is maximum hanger spacing for a horizontal 1/2 inch copper water line?
Select one:
a.
8 feet
b.
3 feet 9 inches.
c.
2 feet 6 inches
d.
6 feet
2.3.4.5
The correct answer is: 8 feet
What is the maximum spacing supporting a 2 inch vertical copper water line?
Select one:
a.
3 m
b.
3.75 m
c.
2.5 m
d.
7.5 m
2.3.4.4
The correct answer is: 7.5 m
Which of the following would have a 2-hour fire· rating?
Select one:
a.
Silicon caulking
b.
Asbestos insulation
c.
Manufactured fire collar
d.
25 mm air gap
Fire stop donut
The correct answer is: Manufactured fire collar
How many hangers would be required for the following installation which already has supports on each end?
5” Galvanized Water Line (plan view)Select one:
a.
6
b.
12
c.
10
d.
8
What are the National Plumbing Code requirements involving floors and walls in shower areas?
Select one:
a.
All shower receptors shall be made of plastic when installed within single family dwellings.
b.
The shower receptor must be constructed so that water cannot leak through walls or floors.
c.
The walls and floors within 2.5 m of the shower head must be lined with plastic
d.
The shower receptor must have an impervious material·up to 2 m above finished floor.
2.2.2.3 (1)
The correct answer is: The shower receptor must be constructed so that water cannot leak through walls or floors.
What type of bolts are used to connect a water closet to its flange?
Select one:
a.
Cadmium plated
b.
Brass
c.
Galvanized
d.
Brass plated
2.2.10.2 (1)(a)
The correct answer is: Brass
What type of hangers are permitted to be used on a 4-inch copper water line?
Select one:
a.
Epoxy coated steel
b.
1/2 inch copper perforated strapping (all-around)
c.
Cadmium plated steel
d.
Galvanized steel
Feedback
The correct answer is: Epoxy coated steel
If the water service is installed in the same trench as the sewer, it should be installed:
Select one:
a.
beside the sewer
b.
below the sewer
c.
above and to one side of the sewer
d.
above the sewer
The correct answer is: above and to one side of the sewer
Under similar thermal conditions, the expansion/contraction of copper pipe:
Select one:
a.
is less than that of steel pipe
b.
is the same as that of steel pipe
c.
is more than that of steel pipe
d.
expands more than steel but contracts less
2.3.3.9 P - A-13
The correct answer is: is more than that of steel pipe
What type of piping is commonly used for the drain lines from a hospital laboratory?
Select one:
a.
Copper
b.
Pyrex
c.
Galvanized steel
d.
Stainless steel
The correct answer is: Pyrex
Which of the following hangers would be best suited for use on a 6 inch galvanized~cold water line?
Select one:
a.
3/4 inch perforated strap iron
b.
8 inch clevis hanger with insulation shield
c.
6 inch ring hanger
d.
6 inch roller hanger with insulation saddle
The correct answer is: 8 inch clevis hanger with insulation shield
What type of pipe support would be used on a 4 inch steel riser passing through 6 stories of a building?
Select one:
a.
Roller hangers
b.
Clevis hangers
c.
Riser clamps
d.
Reznor hooks
The correct answer is: Riser clamps
A good flame for oxy-acetylene brazing would be:
Select one:
a.
Oxidizing Flame
b.
Neutral Flame
c.
Carbonizing Flame
d.
Feathered Flame
The correct answer is: Neutral Flame
A fabricated piece of 10-inch pipe 45 meters long weighs 40 lbs. per lineal foot.. What is the total weight of the load?
Select one:
a.
2900 lbs.
b.
1800 lbs.
c.
3600 lbs.
d.
5900 lbs.
The correct answer is: 5900 lbs.
What is done with shackles and pins when a job is complete?
Select one:
a.
The pins are removed from the shackles and are kept in an accessible rigging box.
b.
The pins are placed in the shackles and stored in a clean dry environment.
c.
Worn pins are replaced with bolts and kept in an accessible rigging box·
d.
Worn pins are replaced with bolts and they are stored together in a clean dry environment.
The correct answer is: The pins are placed in the shackles and stored in a clean dry environment.
The scale usually appears in what part of the drawing ?
Select one:
a.
The key plan .
b.
Specifications
c.
Notes
d.
The title block
The correct answer is: The title block
What type of drawing does this symbol refer to?Select one:
a.
Detail
b.
Section
c.
Oblique
d.
Elevation
The correct answer is: Detail
What is the meaning of this symbol?Select one:
a.
Section drawing 13 appears on the same sheet
b.
A detail drawing appears on page 13
c.
A section drawing appears on page 13
d.
Detail drawing 13 appears on the same sheet
The correct answer is: Detail drawing 13 appears on the same sheet
What type of drawing does this symbol refer to?Select one:
a.
Elevation
b.
Detail
c.
Oblique
d.
Section
The correct answer is: Elevation
What type of drawing does this symbol refer to?Select one:
a.
Detail
b.
Elevation
c.
Oblique
d.
Section
The correct answer is: Section
When using Oxy-Acetylene all the oxygen connections will have?
Select one:
a.
Right Handed Threads/Red Hose
b.
Left Handed Threads/Green Hose
c.
Right Handed Threads/Green hose
d.
Left Handed Threads/Red Hose
Feedback
The correct answer is: Right Handed Threads/Green hose
What is the recommended sling angle when preparing or hosting a lift?
Select one:
a.
60 degrees
b.
20 degrees
c.
10 degrees
d.
90 degrees
A
Welding lenses are available in three basic colors?
Select one:
a.
Amber, Green, Cobalt Blue
b.
Black, Green, Red
c.
Cobalt Blue, Black, Green
d.
Black, Green, Orange
The correct answer is: Amber, Green, Cobalt Blue
What does the abbreviation GTAW mean in regards to different types of welding?
Select one:
a.
Gas Tungsen Arc Welding
b.
Gas Tubing Arc Welding
c.
Gas Tight Arc Welding
d.
General Tig Aluminum Welding
Feedback
The correct answer is: Gas Tungsen Arc Welding
What procedure should be done prior to working on electrical equipment?
Select one:
a.
Wear Insulated Gloves
b.
Turn Off Breaker
c.
Lock-Out Equipment
d.
Install a Ground Fault Interrupter
The correct answer is: Lock-Out Equipment
How do you minimize oxidization when you’re welding?
Select one:
a.
Increase the Amperage
b.
Reduce the Amperage
c.
Clean the pipe with an wire brush
d.
Purge with Argon
The correct answer is: Purge with Argon
What must be done before attaching the regulator to the oxy-acetylene cylinders?
Select one:
a.
Crack cylinder valve to remove dust/dirt
b.
Release the regulator adjusting screw by turning clockwise
c.
Release the regulator adjusting screw by turning counter clockwise
d.
Nothing needs to be done before attaching the regulator
The correct answer is: Crack cylinder valve to remove dust/dirt
If you have a length of ABS pipe 30m long at a temperature of 20 Celsius, what would be the approximate change in length if the temperature was increased in the pipe to 80 degrees Celsius?
Select one:
a.
165mm
b.
55mm
c.
140mm
d.
70mm
A 2.3.3.9
The correct answer is: 165mm
Where a drain is provided in an elevator pit, the drain pipe that’s connected to the sump shall be provided with a ___________?
Select one:
a.
Double Check Valve
b.
Back Water Valve
c.
Float Valve
d.
Expansion Joint
The correct answer is: Back Water Valve
To protect a welding fitter from sparks, the fitters shield should have two glass covered lenses, one positioned in the front and one behind. What colour are these lenses?
Select one:
a.
Green
b.
Blue
c.
Black
d.
Clear
The correct answer is: Clear
When digging a trench how far away for the trench should the spoil pile be (pile of dirt)?
Select one:
a.
1.5m
b.
.6m
c.
2m
d.
2.5m
The correct answer is: .6m
On a commercial job site who is responsible for a lock-out procedure?
Select one:
a.
Installer
b.
Field Safety Representative
c.
Foreman
d.
Safety Officer
The correct answer is: Installer
