Foundation study guide Package one Flashcards
True or False: In describing a tee fitting, the size of the run is mentioned first, followed by the size of the branch.
True
True or False: Pipe dope is usually applied only to the female threads.
False
True or False: 90 degree bends do not impede the flow of fluids as much as 45 degree bends.
False
True or False: Under similar freezing conditions, type “K” soft copper tubing is less likely to burst than steel pipe.
True
True or False: 1” and 2” standard pipe threads have the same number of threads per inch
True
True or False: “Duriron” is well suited for acid drains lines
True
Besides steel and chrome, what other material or element makes up stainless steel?
Nickle
What is copper alloyed with to create bronze?
Tin
What is copper alloyed with to create brass?
Zinc
Complete the following statement: “Fixtures are required to have…”
Smooth, corrosion - resistant surfaces.
Choose the best answer that defines “vitrified”
Glasslike
Which chemical below will affect “Pyrex” pipe?
Hydrofluoric acid
What is the primary purpose for applying pipe dope to pipe thread?
To lubricate + cool the threads when tightening
What would be done to shorten the time bn flushes of a tank - type urinal?
Turn the stem on the control stop counter clockwise
What is the name given to a pip coupling that has bolts running parallel to the pipe to hold it together?
(see picture)
Dresser coupling
What is the standard height of the flood level rim of a regular water closet bowl?
16”
What is the thread used on standard pipe / fittings called?
NPT: National Pipe Thread
When a screwed cast iron fitting is excessively tightened, what will be the most likely result?
A cracked fitting
After tightening a fitting by hand, approximately how many turns are made by a wrench?
2 ½ - 3 turns
Why should the inside walls of pipe be free of burrs and other obstructions?
To decrease the resistance to the flow of fluids
If a pressure gauge reads 14.73 psig, what would the absolute pressure be?
29.46 psia
What is a wrench used to tighten a flat-faced plumbing fitting called?
Spud wrench
What size of pipe wrench is recommended for use on pipes ½” and ¾” ?
14”
What does the schedule number on a pipe indicate?
the wall thickness
Of the black iron pipes, which number indicates the thinnest wall section?
STD
When the diameter of a pipe is doubled, how much does its capacity to convey liquids increase by?
4 times
What is a non-ferrous metal?
Tin
To prevent black iron from rusting during transit, what protective coating is applied to the pipe?
Lacquer
What do the letters “W.O.G” stamped on a valve body mean?
Water, Oil and Gas
If the specification reads, “(4) - ¼” x 2” brass nipples”, What is the length of a nipple?
2”
Which of the following is not a method of steel pipe manufacture?
Victaulic
What would the number of threads / inch for 1/8, ½”, 1 ½” . and 4”
27 TPI, 14 TPI, 11 ½” TPW
What describes the property that allows a metal to be drawn out?
Ductility
What describes or indicates the property that resists or keeps the particles of a body from being torn?
Tenacity
What best describes the ability of a body to transfer heat or electricity from one particle to another?
Conductivity
What best describes the property that allows a metal to be rolled into sheets of various shapes w/o breaking or tearing?
Malleability
How much does mercury weigh in comparison to water?
13.6 Times as much as water
Finish the sentence, “Atmospheric pressure…”
(increase or decreases with higher altitude)
decreases at higher altitudes
- Math question
What is a magnesium rod installed to be sacrificed to the effects of electrolysis known as?
An anode
Which of the following metals is lowest on the EMF series?
Copper, Magnesium, gold, tin?
Magnesium
Which of the following is not an alloy?
Solder, bronze, copper or brass
copper
In order to produce smooth, accurate threads and to cool and lubricate the dies, when is thread cutting oil applied?
During threading
What is the purpose of the foot switch used on a power drive? (besides safety)
It’s an on / off switch
What should the first thing to do when servicing a power vise?
Unplug the power cord
How should shaft bearings on a power vice be lubricated?
With grease
If extension cords must be used with power tools, what should they have?
a 3-prong plug on one end and a 3-pole receptacle on the other end
Why should you not reach across a power vice?
Your foot may come off the switch
you may lose your balance
you cloths may get oil on them
How is pipe secured in the chuck of a power vise?
By using the hand wheel
Complete the sentence, “when hand pipe cutters are used with a power vise…”
The vise rotates the pipe and the support bar prevents the cutters from rotating.
With a power vice, what is the only safe hand reamer to use
A fluted reamer
What is the power threader die head type that does not require reversing?
Quick - opening
Complete the sentence, “A roll groover for pipe…”
(about burrs)
Will not remove the burr
At what point does the coupling seal?
Where the gasket meets the pipe (closer to the end of the pipe)
Complete the sentence, “A power vice…”
Holds and turns pipe
What tool would be best to use to centre a vertical pipe rising out of the ground under a sleeve in the first floor slab?
A plumb-bob
What can a Rigid Model 700 portable drive be used to do?
Thread pipe
With mounted accessories, what can a Rigid Model 300 power vise serve as?
A power threader
Complete the sentence, “A universal drive shaft…”
normally drives a geared threader
How can grooves for joints in steel pipe be made?
By rolling and cutting
Where a hazardous material is transferred by a piping system, what must the system be?
Identified
In reference to WHMIS, what does provincial legislation apply to?
The storage, handling and use of hazardous material
What does WHMIS legislation specify that the employer is responsible to provide?
Worker education on controlled products
What does WHMIS legislation provide workers and employers with?
Information on all types of material
An average thread is cut approximately how many threads long?
12
What is cutting oil used for?
to cool the chasers
to reduce the power required
to help remove cutting chips
What does ductility of metal describe?
its ability to be shaped or drawn out
In reference to WHMIS, what is the employer responsible for checking?
That the controlled products being delivered are properly labeled
What does “WHMIS” stand for?
Workplace Hazardous Material Information System
Standard steel pipe is classified according to size by using the nominal diameter for what sizes of pipe?
1/8” up to and including 12”
At what angle is a standard pipe thread cut?
60 degrees
What is the thread cut on a pipe known as?
male taper thread
What is the number of threads per inch for an 8 - inch pipe?
8
What is the number of threads per inch for a 1 ¼” pipe?
11.5
If a 2” NPS pipe has an ID of 2.067” and an OD of 2.375”, what is the wall thickness?
0.154 “
ID - OD / 2 = WT
A 2” NPS steel pipe is exactly 2.067” ID and the wall thickness is exactly 0.154”. Wat is the exact OD?
2.375”
What is the function of a “ball drip” used on a fire department connection?
to drain the siamese connection
Which threads are cut by the “lead”?
The imperfect ones
At what size does NPS change to OD on mild steel and wrought iron pipes?
14”
What shall the upper end of every soil-or-waste stack terminate in?
a stack vent
Complete the sentence, “Practically all pipe threads are…”
right hand
Which one of the following should a spiral reamer NOT be used with?
a power vise
Backing is not required for what type of fixtures?
Vanity basin
When making an end-to-centre measurement using a threaded fitting, how many allowances must be made in order to cut and thread the pipe?
1 (the centre one)
When making a centre-to-center measurement using a threaded fitting, how many allowances must be made in order to cut and thread the pipe?
2 (both centres)
What are the number of degrees of direction change of a 1/16th bend?
22 ½ degree (16 of them make a circle, 360 degrees)
- math question
Which one of the following would you use to support a 4” galvanized steel water pipe extending through more than 2 storeys?
Riser clamps
Which of the following would you use to support a 6” horizontal branch installed above ground?
Clevis hangers
What would you apply to a strap wrench to keep it from slipping?
Powdered resin
When a break occurs in a water main, what is likely to occur within the house piping?
negative pressure
If cleanouts for two-way rodding are to be installed on a building drain or branch at 50ft (15m) intervals, what min size would the piping be?
less than 2”
What is the min size opening for c/o that are 50ft (15m) apart and are capable of 2-way rodding?
Same size as the drainage pipe
What is the min size air gap allowable?
1” or 2 times the diameter of the supply pipe
What isn’t the purpose of a plumbing vent?
Prevent noise from entering the building via drainage system
An existing pipe is 2 ½” ID and is to be replaced by two pipes equal in size. If the two pipes are to supply at least as much flow as the original, what is the smallest ID for these pipes?
2”
Which of the following would be used to assure trap seal protection?
Use a trap primer
What pressure range of acetylene would you likely be working with during oxy-acetylene welding?
1 - 5 psi
What approximate acetylene and oxygen pressures would you likely use for cutting of ¼” mild steel?
7 acetylene, 37 oxygene
an example of a direct cross connection would be:
a portable water main connection to a plumbing vent
A wax seal with an embedded plastic ring is known in the trade as a:
“Kant-leak”
The max height at which a worker can work above ground before requiring guardrails is:
10 ft
A hot water tank must have a shutoff valve located:
on the cold water inlet
If it was required to have a sink full of water, with hot water running continuously, what device could be used to achieve this?
install a standing waste
Under similar temp conditions, the expansion rate of copper pipe is:
more than steel pipe
A component of a hydronic system that employs an end switch is a:
4-wire zone valve
At what size does NPS change to OD on mild steel and wrought iron pipes?
14”
What is the purpose of the fire department connection on the outside of a building?
allow the fire department to boost the water pressure in the system
The min number and size of planks for a working platform is:
2 planks, 2” x 10”
When using wrenches to tighten a valve onto a pipe, the wrenches would be placed:
one on the pipe and one on the valve on the end the pipe is inserted into
A vacuum relief valve is used to:
relieve a negative pressure in a HWT
Shaft bearing on a power vise should be lubricated with:
with grease
The anode rod in a HWT:
becomes smaller with use
Soil pipe cutters (snap cutters) are designed to cut:
cast iron pipe
In areas subject to heavy frost conditions, the min size of the vent termination serving an individually-vented bathtub shall be not less than:
3”
In plumbing, the term “nominally horizontal” refers to a pipe graded to:
less than 45 degree angle with the horizontal
The resistance to flow in a piping system can be decreased most satisfactorily by:
increasing the pipe size
ASME stand for?
American Society of Mechanical Engineers
95/5 solder contains:
95% tin, 5% antimony
The density of a substance is defined as:
it’s mass per unit volume
Which of the following valves would create the most friction losses when fully open?
globe valve
A negative pressure in a plumbing drain, waste and vent system can cause a trap to lose its seal by:
siphonage
Epoxy coating applied to ring hangers is required to prevent:
galvanic corrosion through dissimilar mental contact
The pivot point of a lever in known as a(an):
Fulcrum
A cross fitting is allowed in a plumbing system to connect:
Only vent piping
