Review #1 A + B Flashcards
(162 cards)
1
Q
Stainless steel is an alloy of steel, chrome and
A
Nickel
2
Q
Bronze is an alloy of copper and
A
Tin
3
Q
Brass is an alloy of copper and
A
Zinc
4
Q
Fixtures are required to have
A
Smooth, corrosion-resistant surfaces
5
Q
Choose the best answer that defines “vitrified”
A. Hard
B. Smooth
C. Glasslike
D. Rough
A
C. Glasslike
6
Q
Which chemical will affect “Pyrex” pipe?
A
Hydroflouric acid
7
Q
Pipe dope is applied to pipe threads to primarily
A
Lubricate and cool the threads when tightening
8
Q
The name given to a pipe coupling that has bolts running in parallel to the pipe to hold it together
A
Dresser coupling
9
Q
When a screwed cast iron fitting is excessively tightened, what will be the most likely result?
A
Cracked fitting
10
Q
The inside walls of pipe should be free if burrs and other obstructions in order to
A
Decrease the resistance to the flow of fluids
11
Q
If a pressure gauge reads 14.73 psig, what would the absolute pressure be?
A
29.46 psia
12
Q
A wrench used to tighten a flat-faced plumbing fitting is called a
A
Spud wrench
13
Q
The size of a pipe wrench recommended for use on pipes 1/2” and 3/4” is
A
12”
14
Q
The schedule number on a pipe indicates
A
The wall thickness
15
Q
Of the black iron pipes listed below, the one with the thinnest wall section would be designated:
A. XH
B. Schedule 80
C. XXS
D. Std
A
D. Std
16
Q
When the diameter of a pipe is doubled, it’s capacity to convey liquids increases:
A
4 times
17
Q
Which of the following is a non-ferrous metal?
A. Stainless steel
B. Duriron
C. Wrought iron
D. Tin
A
D. Tin
18
Q
To prevent black iron from rusting during transit, what protective coating is applied to the pipe?
A
Lacquer
19
Q
The letter “W.O.G” stamped on a valve body would mean
A
Water, oil, gas
20
Q
If the specification reads “(4) - 1/4” x 2” brass nipples” the length of the nipple is
A
2”
21
Q
Which one of the following is not a method of steel pipe manufacture?
A. Butt weld
B. Electro-resistance weld
C. Seamless
D. Victaulic
A
D. Victaulic
22
Q
The number of threads per inch for 1/8”, 1/2”, 1 1/2”, and 4” pipe would be
A
27 TPI, 14 TPI, 11 1/2 TPI, 8 TPI
23
Q
Which of the following best describes the property that allows a metal to be drawn into a wire?
A. Tenacity
B. Ductility
C. Malleability
D. Conductivity
A
B. Ductility
24
Q
Which of the following best describes or indicates the property that resists or keeps the particles of a body from being torn apart?
A. Tenacity
B. Ductility
C. Malleability
D. Conductivity
A
A. Tenacity
25
Which if the following best describes the ability of a body to transfer heat or electricity from one particle to another?
A. Tenacity
B. Ductility
C. Malleability
D. Conductivity
D. Conductivity
26
Which if the following best describes the property that allows a metal to be rolled into sheets of various shapes without breaking or tearing?
A. Tenacity
B. Ductility
C. Malleability
D. Conductivity
C. Malleability
27
Mercury weighs
13.6 times as much as water
28
Atmospheric pressure ___ at higher altitudes
Decreases
29
A magnesium rod installed to be sacrificed to the effects of electrolysis is
An anode
30
Which if the following metals is lowest on the EMF series?
A. Copper
B. Magnesium
C. Gold
D. Tin
B. Magnesium
31
Which of the following is not an alloy?
A. Solder
B. Bronze
C. Copper
D. Brass
C. Copper
32
To produce smooth, accurate threads and to cool and lubricate the dies, thread cutting oil is applied:
During threading
33
Besides being a safety device, the foot switch used on a power drive is a remote
On-off switch
34
The first thing to do when servicing a power vise is to
Unplug the power cord
35
Shaft bearings on a power vise should be lubricated
With grease
36
If extension cords must be used with power tools, they should have
A 3 prong plug on one end and a 3 pole receptacle on the other end
37
The pipe is secured in the power vise by the use of
The hand wheel
38
When hand pipe cutters are used with a power vise:
The vise rotates the pipe and the support bar prevents the cutters from rotating
39
With a power vise, the only safe hand reamer to use is a:
Fluted reamer
40
The power threader die head type that does not require reversing is called
Quick opening
41
A roll groover for pipe ____ remove the burr
Will not
42
This tool would best be used to centre a vertical pipe rising out of the ground under a sleeve in the first floor slab:
Plumb bob
43
A universal drive shaft:
A. Is used for threading any and all pipes
B. Normally drives a geared threader
C. Turns the pipe in a stationary threader
D. Connects a power vise to a roll groover
B. Normally drives a geared threader
44
Grooves for joints in steel pipe can be made by:
Rolling and cutting
45
Ductility of metal describes its:
Ability to be shaped or drawn out
46
Standard steel pipe is classified according to size by using the nominal diameter for all sizes from
1/8” up to and including 12”
47
A standard pipe thread is cut at an angle of
60 degrees
48
The thread cut on a pipe is known as
Male taper thread
49
What is the number of threads per inch for an 8” pipe?
8
50
The threads cut by the “lead” are the ____ ones
Imperfect
51
At what size does NPS change to OD on mild steel and wrought iron pipes?
14 inch
52
A spiral reamer should not be used with a
Power vise
53
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
54
The number of degrees of direction change of a 1/16 bend is
22 1/2
55
What would you use to support a 4” galvanized steel water pipe extending through more than 2 storeys?
Riser clamp
56
What would you use to support a 6” horizontal branch installed above ground?
Clevis hangers
57
To prevent a strap wrench from slipping, you would apply to the strap
Powdered resin
58
What pressure range of acetylene would you likely be working with during oxy-acetylene welding?
1-5 psi
59
The resistance to flow in a piping system can be decreased most satisfactorily by
Increasing the pipe size
60
Which of the following valves would create the most friction losses when fully open?
A. Ball valve
B. Globe valve
C. Gate valve
D. Butterfly valve
B. Globe valve
61
When using wrenches to tighten a valve onto a pipe, the wrenches would be placed:
One on the pipe and one in the valve on the end the pipe is inserted into
62
Why is it necessary to ream a pipe before cutting the thread?
If reaming follows threading, the pipe end may split or flare
63
The pivot point of a lever is known as a
Fulcrum
64
Fluxes used for brazing have a temperature range of
1100 - 1500 ‘F
65
An object which floats displaces
More than it’s own weight of water
66
23” of Hg would be equal to how many inches of water column?
23 x 13.6 = 312.8”
67
A good flame for oxy-acetylene welding of steel would be
Slightly carbonizing
68
Galvanized pipe is steel pipe with a coating of
Zinc
69
95/5 solder would likely contain:
95% tin, 5% antimony
70
The pressure at the base of a column of water 45 feet high would be:
45 x .433 = 19.49 psi
71
The formula for calculating specific weight is
Specific Weight = Weight Density of Substance / Weight Density of Water
72
A cubic foot of water weighs
62.4 lbs
73
Victaulic couplings are sealed by
Line pressure
74
The upper portion of a ladder should extend past the point of contact with the roof by
3 ft (1 m)
75
Which of the following knots is used to tie together two ropes of unequal diameter?
Sheet bend
76
Compared to a grade of 1/8” per foot, 1% grade is slightly ____
Shallower
1/8” divided by 12 = 0.010417
1/100 = 0.01
77
The maximum height at which a worker can work above ground before requiring guardrails is
10 ft (3 m)
78
When required, guardrails shall be placed at
42” above the platform
79
A ditch that is 4’ 6” deep
A. Requires no shoring
B. Requires shoring
C. Requires sloping of the sides
D. Requires shoring or sloping
D. Requires shoring or sloping
80
Cast iron water main pipe such as ductile iron is often lined with cement to
Prevent corrosion
81
The density of a substance is defined as
It’s mass per unit volume
82
A cross fitting is allowed in a plumbing system to connect
Only vent piping
83
When using a wrench to tighten chrome-plated piping, what type of wrench would be best suited for this purpose?
Friction or strap wrench
84
The standard height of the flood level rim of a regular water closet is
16”
85
The thread used on standard pipe fittings is called
NPT
86
After tightening a fitting by hand, it is turned by a wrench
Approximately 2 1/2 to 3 turns
87
A wax seal with an embedded plastic ring is know in the trade as a
“Kant-leak” wax seal
88
Where a hazardous material is transferred by a piping system, the system must be
Identified
89
WHMIS legislation covers the responsibility of the employer to provide
Worker education on controlled products
90
An average thread is cut approximately
12 threads long
91
What is the number of threads per inch for a 1 1/4” pipe?
11.5
92
The upper end of every soil-or-waste stack shall terminate in
A stack vent
93
Practically all pipe threads are ____ hand
Right hand
94
What is the purpose of the small chain attached to the control valve for a flush tank of a urinal?
To stop noise and splashing
95
In areas subject to heavy frost conditions, the minimum size of the vent termination serving an individually vented bathtub shall not be less than
3”
96
The minimum length of lead stub between the underside of the closet flange and the copper ferrule is
3”
97
Submersible well pumps often have high shutoff heads. To avoid damage to the system components and piping, what can be installed?
A pressure relief valve
98
If you had to install a lavatory basin or similar fixture with no waste and overflow, how would you guard against possible overfilling of the fixture?
Install a self-closing faucet
99
When a break occurs in a water main, what is likely to occur within the house piping?
Negative pressure
100
On the installation of a shampoo basin, what protective device is installed to prevent backsiphonage?
A vacuum breaker
101
To ensure that bacteria is eliminated in a commercial dishwasher, the final rinse temperature should be no less than
180 ‘F (82 ‘C)
102
The water supply to a potato peeler is always installed by the use of
An air gap
103
The minimum size air gap allowable is
1” or 2 times the diameter of the supply pipe
104
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
105
A component of a hydronic system that employs an end switch is a
4-wire zone valve
106
What would be used to assure trap seal protection?
Trap primer
107
If the hydraulic load in an S-trap standard was 3 FU, what would the trap size be?
3”
108
What approximate acetylene and oxygen pressures would you likely use for cutting or 1/4” mild steel?
7 acetylene, 37 oxygen
109
What would be expected at the base of a riser?
A shut-off valve
110
What is the maximum distance between cleanouts in a 4” sanitary building drain?
30 m (100 ft)
111
A shallow well pump is installed directly above a well. What determines the depth to which water can be accessed?
Atmospheric pressure
112
The effectivenesss of an air chamber depends primarily upon
Volume of air in the chamber
113
A residential wall-hung toilet would most likely be which bowl type?
Siphon jet or reverse trap with jet
114
The relief valve piping from a hot water tank shouldn’t be piped directly into a floor drain because
Contamination of the potable water system may occur
115
A.S.M.E stands for
American Society of Mechanical Engineers
116
Under similar temperature conditions, the expansion rate of copper pipe is ___ than steel pipe
More than steel pipe
117
A Durham fitting is used in
Drainage piping
118
A clinic sink is a hospital fixture that is used for
Rinsing bed pans out
119
Diatomaceous earth is
Used as a pool filter
120
According to most fixture rough-in books, a standard wall-hung basin waste pipe rough-in would be closest to
18” AFF
121
The minimum number and size of planks for a working platform is
2 planks, 2” x 10”
122
Chlorination will remove
Harmful bacteria from water
123
Brine is used in which cycle of a water softener?
Regeneration
124
The brine from a water softener will usually ________ the septic process
Not affect
125
Too much manganese in water could cause _____ stains on fixtures
Black
126
The process used to speed up the sedimentation of fine suspended matter in water is called
Flocculation
127
A catspaw is used in rigging to
Stop a load from see-sawing on a hook
128
The term zeolite refers to
Softening agent in a water softener
129
A “bowline on the bight” is tied
In the middle of the rope
130
A wall through urinal is
Prohibited from installation
131
A negative pressure in a plumbing drain, waste and vent system can cause a trap to lose its seal by
Siphonage
132
In plumbing the term “nominally horizontal” refers to a pipe graded to
Less than 45 degree angle with the horizontal
133
A piston pump is a
Positive displacement pump
134
A “Douglas Flush Valve” is a name used to describe
An overflow and flapper assembly of a tank type water closet
135
____ is not considered to be an adequate protection of potable water systems against backsiphonage backflow
Vacuum relief valve
136
A reverse-acting aquastat used in a hydronic heating system would be used to:
Activate the circulator
137
The suggested flood level rim height for a wall-hung basin is
31 inches
138
A “flush elbow” is
The pipe that connects a wall-hung tank to the toilet bowl
139
The direct flush valve of a water closet should be adjusted to
Adequately flush the bowl using the least amount of water
140
Marble chips would be used in conjunction with a
Acid interceptor
141
An oil and gasoline interceptor must have vents connected
At the top at both ends of the sump
142
The vents for a gasoline and oil interceptor shall terminate directly in open air and
At levels differing by 12” (300 mm)
143
A pan for a hot water tank must have sides that are at least ____ high
1”
144
A small hole is located near the top of the dip tube of a hot water tank to prevent:
Siphonage if water from the tank
145
The dip tube in a hot water tank is located
On the cold inlet
146
The minimum air gap shall be
1”
147
Too much iron in water could cause ____ stains on fixtures
Red
148
A backflow preventer installed on the outlet of a fixture control valve would likely be a
Atmospheric vacuum breaker (janitor sink)
149
Of the methods used to prevent cross connection contamination, the highest protection provided is usually by the installation of
An air gap
150
A pressure vacuum breaker will stop backflow caused by
Backsiphonage only
151
A vacuum relief valve is used to
Relieve a negative pressure in a HWT
152
A hot water tank must have a shutoff valve located
On the cold water inlet
153
Indirect (momentum) siphonage of a trap is due to
The operation of other fixtures in the system
154
A piping material not approved for an interior leader (RWL) is
A. Asbestos cement
B. ABS
C. Sheet metal
D. Copper
C. Sheet metal
155
A hot water tank, under pressure of 75 psig, has a faulty thermostat and continues to heat. If the T&P relief valve was also stuck in the closed position, the result would be:
The pressure would increase while the temperature rises to more than 212 ‘F
156
The minimum degree of hardness in water that warrants the installation of softening equipment is:
10.5 to 25 gpg
157
A heating boiler is being used to heat the house and domestic water as well. The hot water pipe from the coil in the burner would have a
Zone valve installed
158
What is an activated carbon filter used for?
Taste and odour removal
159
The operation of diaphragm and piston type flush valves is governed by
Total force
160
If a reservoir is located 240 feet above the mains in a town, how much pressure would exist in the mains?
104 psi
240 x .433 = 103.92
161
A customer complains of noise and vibration whenever the hot water faucet is turned on. The probable cause is:
The faucet washer is loose
162
The maximum allowable cumulative change of direction for a fixture other than one that operates by siphonic action shall not be greater that _____ degrees
135 degrees
