block E review Flashcards
(115 cards)
1
Q
Measurements for floor heights and drop ceilings for rough-in purposes are taken from the buildings:
Select one:
a.
site plan
b.
floor plan
c.
specifications
d.
cross sectional elevation drawing
A
D
2
Q
A fixture for the purpose of overflow protection that does not receive the regular discharge from other fixtures, appliances, or devices is known as:
Select one:
a.
a hub drain
b.
a sump drain
c.
a floor drain
d.
an emergency floor drain
A
D
3
Q
A pipe that connects the waste opening of a fixture to its trap is a:
Select one:
a.
trap arm
b.
fixture drain
c.
fixture outlet pipe
d.
direct connection
A
C
4
Q
The maximum allowable length of a fixture outlet pipe is:
Select one:
a.
1200 mm
b.
600 mm
c.
900 mm
d.
750 mm
A
A
5
Q
Drainage lines from refrigerators and other food containers should be:
Select one:
a.
connected to a grease interceptor
b.
trapped and directly connected to the sanitary drainage system
c.
discharged through a trapped air break
d.
connected directly to the sanitary drainage system
A
C
6
Q
Which of the following must be indirectly connected?
Select one:
a.
A drinking fountain
b.
A dental cuspidor
c.
A sterilizer
d.
A bidet
A
C
7
Q
Which of the following shall drain to a sanitary drainage system?
Select one:
a.
A water-treatment device draining clear-water waste
b.
A floor drain only receiving clear-water waste
c.
A drinking fountain
d.
A sterilizer
A
D
8
Q
Which of the following may be drained to a storm drainage system?
Select one:
a.
A transformer vault floor drain
b.
A sterilizer
c.
A drinking fountain
d.
A display case in a deli
A
C
9
Q
What would the minimum number of roof drains be for a roof that is 90 m long and 45 m wide?
Select one:
a.
5
b.
7
c.
6
d.
4
A
C
10
Q
What is the maximum developed length of a fixture outlet pipe serving an island sink?
Select one:
a.
1200 mm
b.
1500 mm
c.
600 mm
d.
900 mm
A
A
11
Q
Where would you connect the discharge line from a dishwasher to a kitchen sink?
Select one:
a.
To the disposal unit
b.
Through a Y-fitting on the trap arm of the sink
c.
Through a sanitary tee on the inlet of the sink trap
d.
To the concealed overflow
A
A
12
Q
What are the requirements for a sump installed in a building?
Select one:
a.
Watertight and air tight
b.
Air tight and vented
c.
Watertight and vented
d.
Watertight, air tight and vented
A
D
13
Q
What would be the size of a fixture outlet pipe that serves all three compartments of a kitchen sink?
Select one:
a.
1 1/4 inch
b.
2 inch
c.
3 inch
d.
1 1/2 inch
A
B
14
Q
What is the minimum permitted size for a floor drain in a single family dwelling?
Select one:
a.
2 inch
b.
3 inch
c.
4 inch
d.
1 1/2 inch
A
A
15
Q
What considerations must be made if one trap is to serve a group of shower drains ?
Select one:
a.
All are correct
b.
It must have a clean-out
c.
All showers must be in the same room
d.
They cannot be located where they can receive organic matter
A
A
16
Q
If a roof is 45 m wide and 60 m long, how many roof drains would it require?
Select one:
a.
8
b.
6
c.
2
d.
4
A
D
17
Q
A “T&P” relief valve must be located:
Select one:
a.
within the top 150 mm of the water heater
b.
within 150 mm of the pump intake
c.
within the bottom 150 mm of the water heater
d.
within 150 mm of the pump discharge
A
A
18
Q
What is the minimum size connector serving a supply pipe to a lavatory is?
Select one:
a.
3/8 inch I.D.
b.
1/2 inch I.D.
c.
1/4 inch I.D.
d.
5/8 inch I.D.
A
C
2.6.3.4 (3)
19
Q
What is placed in the cold water inlet to the top of the hot water tank to prevent cold water from being drawn from a hot water faucet?
Select one:
a.
Dip tube
b.
Vacuum relief valve
c.
“T&P” relief valve
d.
Check valve
A
A
20
Q
The shield on a drinking fountain must be set at a minimum angle of:
Select one:
a.
60 degrees
b.
45 degrees
c.
90 degrees
d.
30 degrees
A
B
21
Q
A pressure relief valve installed on a hot water tank is· designed to open when it reaches:
Select one:
a.
200 PSI
b.
100 PSI
c.
150 PSI
d.
the rated working pressure of the tank
A
D
22
Q
The maximum length of a connector supplying a lavatory is:
Select one:
a.
900 mm
b.
1000 mm
c.
500 mm
d.
750 mm
A
D
23
Q
The flood level rim height of a standard water closet is:
Select one:
a.
12 inches
b.
17 inches
c.
18 inches
d.
15 inches
A
D
24
Q
Basins in public washrooms are protected against overfilling by being ·equipped with:
Select one:
a.
self-closing faucets
b.
pressure regulators
c.
float valves
d.
automatic siphons
A
A
25
What protective device is used on a shampoo basin to prevent backsiphonage?
Select one:
a.
Vacuum breaker
b.
Check valve
c.
RPBA
d.
Air gap
A
26
To assure that bacteria is effectively eliminated in a commercial dishwasher, the final rinse temperature should be at least:
Select one:
a.
180°F
b.
140 °F
c.
120 °F
d.
160 °F
A
27
A residential wall-hung toilet would most likely be which one of the following bowl types ?
Select one:
a.
Siphon-jet or reverse trap with jet
b.
Blowout
c.
Washdown
d.
Washout
A
28
Brine is used in which of the cycles of a water softener?
Select one:
a.
Rinse cycle
b.
Regeneration cycle
c.
Flushing cycle
d.
BackWash cycle
B
29
Too much manganese in water causes:
Select one:
a.
yellow stains on fixtures
b.
black stains on fixtures
c.
blue stains on laundry
d.
green stains on fixtures
B
30
The word "zeolite" refers to:
Select one:
a.
the silica sand in the water softener
b.
the softening agent in the water softener
c.
the brine in the water softener
d.
the salt in the water softener
B
31
Too much iron in water causes:
Select one:
a.
red stains on fixtures
b.
yellow stains on fixtures
c.
green stains on fixtures
d.
blue stains on laundry
A
32
The flood level rim for a wall-hung basin is closest to:
Select one:
a.
29 inches A. F. F.
b.
42 inches A.F.F.
c.
31 inches A.F.F.
d.
36 inches A.F.F.
C
33
A "flush elbow" is:
Select one:
a.
used to connect a wall-hung water closet tank to the bowl
b.
used on a water supply pipe installed flush with the wall
c.
an elbow used with a flushometer valve
d.
a short turn 90° elbow connected to a floor flange
A
34
A small hole is located on the dip tube of a hot water tank to prevent:
Select one:
a.
siphonage of water from the tank
b.
the tank from overheating
c.
the tank from expanding due to excessive pressure
d.
cold water from being drawn from the tank to the fixture
A
35
An immersion element in a electric hot water tank is considered to be:
Select one:
a.
90 percent efficient
b.
70 percent efficient
c.
80 percent efficient
d.
100 percent efficient
D
36
A tankless water heater :
Select one:
a.
stores hot water for future use
b.
is 100 percent efficient
c.
are only used for single fixtures
d.
fires its burner when flow is established
D
37
A baffle is placed in the flue passage of a gas-fired hot water tank:
Select one:
a.
to speed the exit of hot combustion gases
b.
to prevent freeze-up
c.
to slow the exit of hot combustion gases
d.
to help keep the flue free of soot
C
38
In a water closet tank, the "upper lift wire":
Select one:
a.
is connected to the tank ball (flapper)
b.
is part of the float control valve
c.
connects the float control valve to the float
d.
is attached to the overflow tube
A
39
A urinal flush tank uses the following method to effect a flush:
Select one:
a.
a metering valve
b.
capillary attraction
c.
a timer
d.
siphonic action
D
40
A rough-in book is used to:
Select one:
a.
find the measurements for bathrooms as required by the building code
b.
size wastes from fixtures
c.
size building drains
d.
find the rough-in dimensions of the fixture to be installed
D
41
Self-closing faucets are used essentially to:
Select one:
a.
prevent scalding
b.
prevent waste of water
c.
allow limited volumes of water into bathtubs
d.
prevent overflowing of fixtures
B
42
From the following list, choose the flush valve water closet bowl that's found most commonly in "wall outlet" types:
Select one:
a.
wash down
b.
reverse trap
c.
siphon jet
d.
blowout
D
43
Barrier-free water closets require a minimum finished sidewall clearance of:
Select one:
a.
12 inches (300 mm)
b.
18 inches (450 mm)
c.
15 inches (375 mm)
d.
24 inches (600 mm)
B
44
A flow restrictor is installed on the inlet of a grease interceptor to:
Select one:
a.
hold grease in the inlet piping
b.
compensate for undersized interceptors
c.
make the interceptor more efficient
d.
act as a filter
C
45
The overflow rim height of a "barrier-free" toilet bowl is closest to:
Select one:
a.
16 inch (400 mm)
b.
12 inch (300 mm)
c.
14 inch (350 mm)
d.
21 inch (525 mm)
A
46
The purpose of the threaded nipple on a chair carrier for a commercial wall-hung water closet is:
Select one:
a.
to allow for different wall thickness and finishes
b.
to support the bowl
c.
to adjust the height of the bowl
d.
to seal the bowl to the wall
A
47
The correct name given to the drain arrangement installed on an enamelled steel bathtub is:
Select one:
a.
pop-up waste
b.
mechanical pop~up
c.
waste and overflow
d.
plug and chain
C
48
Wall carriers for water closet bowls do not have adjustments for:
Select one:
a.
wall depth
b.
horizontal centre line of bowl
c.
height of discharge piping
d.
bowl height
B
49
Where would you find the space requirement for a water closet tank?
Select one:
a.
Manufacturer's Rough-In Book
b.
National Plumbing Code
c.
B.C. Building Code
d.
Standards Council of Canada
A
50
What determines the height of a drinking fountain?
Select one:
a.
ULC
b.
CSA
c.
The average height of the people using it
d.
National Plumbing Code
C
51
What is the purpose of the shield on the bubbler on a drinking fountain?
Select one:
a.
To regulate the volume of flow
b.
To provide the proper spray pattern
c.
To prevent contamination of the nozzle
d.
To direct water flow
C
52
All piping downstream of a reverse osmosis unit must be made of:
Select one:
a.
steel
b.
plastic
c.
lead
d.
copper
B
53
How may the drain line from a reverse osmosis unit connect to a plumbing drainage system?
Select one:
a.
Indirectly connected to either a storm or sanitary system
b.
Can not be connected to a plumbing system
c.
Directly connected to a sanitary system
d.
Directly connected to a storm system
A
54
To increase the pH level of the raw water supply with a pH between 6.0 and 6.9, the proper filter to use is a/an:
Select one:
a.
manganese green sand filter
b.
sulphur filter
c.
neutralizing filter
d.
carbon filter
C
55
Which compounds make water hard?
Select one:
a.
Calcium and magnesium
b.
Sulphur and calcium
c.
Iron and manganese
d.
Chlorine and phosphate
A
56
Which impurity can be a source of disease and make water unfit for human consumption?
Select one:
a.
Iron
b.
Hardness
c.
Bacteria
d.
Sodium salt
C
57
What effect from impurities in the water will discolor water, stain plumbing fixtures, and cause deposits in water heaters?
Select one:
a.
Hardness
b.
Bacteria
c.
Iron
d.
Sodium salt
A
58
When heat is added to hard water, the hardness mineral deposits form:
Select one:
a.
acid
b.
iron
c.
scale
d.
sulphur
C
59
What chemical is used to regenerate a manganese green sand filter?
Select one:
a.
Zeolite
b.
Potassium Permanganate
c.
Carbon
d.
Sodium Chloride
B
60
Where can the purified water from a reverse osmosis unit connect to the public water supply system?
Select one:
a.
Downstream of the PRV
b.
Downstream of an air gap
c.
The water from this unit can not be connected to the public water supply system
d.
Downstream of the water meter
c
61
Which of the following systems should be connected upstream of a water softener?
Select one:
a.
Laundry services
b.
Drinking fountain
c.
Irrigation
d.
Hot distribution
C
62
If water is being pumped from a well to supply a drinking water system and contained all of the following water treatment devices, which device would be connected the furthest downstream?
Select one:
a.
Sand filter
b.
Chlorinator
c.
Activated carbon filter
d.
Softener
D
63
A pH test of water determines the:
Select one:
a.
iron content
b.
degree of hardness
c.
acidity
d.
oxygen content
c
64
If a water test indicated a pH level of 8, it would be considered:
Select one:
a.
slightly alkaline
b.
highly alkaline
c.
highly acidic
d.
slightly acidic
A
65
On a potable water system what does the pH scale indicate?
Select one:
a.
Positive or negative ions
b.
Hard or soft water
c.
Acidity and alkalinity
d.
Chemicals and bacteria
C
66
What must be done to the piping downstream of a reverse osmosis unit prior to being put into service?
Select one:
a.
Disinfected with a 2% chlorine solution then flushed with potable water
b.
Heated to 180°F then flushed with bleach
c.
Heated then cooled quickly
d.
Disinfected and flushed with potable water
D
67
R.O. units work best if the water is:
Select one:
a.
hot
b.
cold
c.
warm
d.
hard
C
68
What type of materials are typically used for plumbing fixtures in detention facilities?
Select one:
a.
Stainless steel
b.
High density polyethylene
c.
Porcelain-enamelled
d.
Vitrified china
A
69
What is the minimum allowable distance between two shower heads?
Select one:
a.
1000 mm
b.
500 mm
c.
300 mm
d.
750 mm
D
70
What are the primary substances contained in hard water?
Select one:
a.
Calcium, Bicarbonates and Magnesium Sulfates
b.
Copper, Zinc and Cadmium
c.
Potassium Permanganate, Calcium and Lead
d.
Manganese, Sulfates and Iron
A
71
What considerations must be considered for the installation height of a urinal?
Select one:
a.
The height of the water supply
b.
The type of floor and wall coverings
c.
The average height of the people using it
d.
Distances from openable windows and doors
C
72
What kind of trap would you find on a close-coupled water closet?
Select one:
a.
Integral
b.
Bell
c.
Indirect
d.
S-trap
A
73
Why should extra caution be taken with water from a reverse osmosis unit?
Select one:
a.
The water is very acidic
b.
The water does not contain chlorine
c.
The water contains high levels of fluoride
d.
The water is very soft
B
74
In the direction of flow, what would be the installation sequence for a water. softener, sand filter and a carbon filter?
Select one:
a.
Sand filter, water softener, carbon filter
b.
Carbon filter, sand filter, water softener
c.
Sand filter, carbon filter, water softener
d.
Water softener, sand filter, carbon filter
C
75
What is the installation height for a wall hung urinal intended for adult use?
Select one:
a.
600 mm
b.
900 mm
c.
1200 mm
d.
300 mm
A
76
Besides hardness, what else does a water softener remove?
Select one:
a.
Bacteria
b.
Iron
c.
Sulphur
d.
Acidity
B
77
Why is ultraviolet light used in some water treatment systems?
Select one:
a.
Water softening
b.
Neutralizing acids
c.
Lower chlorine content
d.
Kill bacteria
D
78
What testing equipment or devices could be used to· determine pH levels?
Select one:
a.
Digital Test Analyzer
b.
All options are correct
c.
Clear tube and Bromthymol Blue
d.
Litmus Paper
B
79
How far from the back wall should a flush valve operated water closet be roughed in?
Select one:
a.
400 mm
b.
350 mm
c.
250 mm
d.
300 mm
C
80
How does an ion exchange water softener work?
Select one:
a.
The calcium and magnesium ions are too large to pass through the rubber membrane
b.
The zeolite ions are trapped in a bed of sand and releases salt ions
c.
Because of the electrical charges in the manganese greensand the hardness ions are attracted to it
d.
The zeolite absorbs the calcium and magnesium ions and releases sodium
D
81
What is the purpose of a charcoal filter?
Select one:
a.
To soften water
b.
To remove solids
c.
To remove taste and odour problems
d.
Neutralize acids
C
82
What fixture could be used to maintain a .trap seal for a floor drain in a basement?
Select one:
a.
Drinking fountain
b.
Bidet
c.
Laundry tray
d.
Shower
A
83
How do you allow for the grade on a branch when installing four wall hung water closets?
Select one:
a.
Install the carriers at different heights
b.
Adjust the height of each face plate
c.
Adjust the length of the carrier nipple
d.
Install the water closets at different heights
B
84
The side clearance for a toilet when next to a wall or a bathtub is 15”, what’s the side clearance next to another toilet or urinal?
Select one:
a.
30 inches
b.
42 inches
c.
24 inches
d.
36 inches
A
85
A fixture unit is a standard rate of waste discharge established so that load values for plumbing drainage can be expressed as a standard rate of?
Select one:
a.
1 ft3/sec
b.
1 GPH
c.
1 ft3/min
d.
1 GPM
C
86
Which of the following does not use the principle of siphonic action to flush contents out of a water closet?
Select one:
a.
Siphon Vortex
b.
Blowout
c.
Reverse Trap
d.
Siphon Jet
B
87
One of the most common types of water closets installed in residential application are close-coupled. Which of the following would be considered a close-coupled water closet?
Select one:
a.
The water closet is wall mounted directly to the flange.
b.
The tank and bowl are enclosed as one piece.
c.
The flush tank is fastened directly over the bowl.
d.
The water closet is floor mounted directly to the flange.
C
88
In a washroom that is classified as barrier free, grab bars are required on one sometimes two sides of the water closet. Each bar should be approximately how long?
Select one:
a.
36 inches
b.
30 inches
c.
24 inches
d.
42 inches
D
89
How do you shut off the control stop on a direct flush valve for a urinal?
Select one:
a.
Flat head screw driver
b.
Pipe wrench
c.
Phillips screw driver
d.
Cresent Wrench
A
90
Which of the following best determines the length of time for a piston or diaphragm flush valve to cycle ?
Select one:
a.
Size of the bypass orifice
b.
Size of the piston
c.
Size of the diaphragm
d.
Pressure in the upstream piping
A
91
A magnesium rod , installed in a tank and intended to be sacrificed to electrolysis, is a/an :
Select one:
a.
Current Path
b.
Anode
c.
Cathode
d.
Electrolyte
b
92
How is the volume of flow to a urinal flush tank controlled ?
Select one:
a.
Needle Valve
b.
Ball Valve
c.
Flush Valve
d.
Metering Valve
D
93
What type of of bottle should be used when collecting a water sample within a highrise building ?
Select one:
a.
Plastic
b.
Glass
c.
Stainless steel
d.
Sterilized and sealed
D
94
What is the problem if the water tastes salty from a softening water system ?
Select one:
a.
The water softener requires regeneration
b.
The regeneration cycle was too short
c.
The backwash cycle was too short
d.
The rinse cycle was too short
D
95
What procedure must be done if the water after a water softener becomes hard water ?
Select one:
a.
It must be regenerated
b.
It needs to be rinsed
c.
The zeolite must be replaced
d.
It must be backwashed
A
96
Which type of water treatment device would be used if a water system was found to contain coliform organisms ?
Select one:
a.
Reverse Osmosis filter
b.
Water softener
c.
Manganese Green-sand Filter
d.
Chlorinator
D
97
If a compression style stop is found to be leaking and after changing the washer is still leaking , what may be the cause ?
Select one:
a.
Worn or damaged seat
b.
Spline is damaged
c.
Faulty packing nut
d.
Faulty stem assembly
A
98
To shorten the time between flushes of a flush tank type urinal , the plumber would :
Select one:
a.
Turn the adjusting screw of the control stop clockwise
b.
Increase supply pressure
c.
Turn the adjusting screw of the control stop counter-clockwise
d.
Decrease supply pressure
C
99
The direct flush valve on a water closet should be adjusted to :
Select one:
a.
Flush for a minimum of 30 second
b.
Flush for a specified time according to the national plumbing code.
c.
Flush or a minimum of 60 second
d.
Adequately flush the bowl with the least amount of water
D
100
Which of the following is the correct way to shorten the flush of a flushometer valve ?
Select one:
a.
Turn the needle valve adjusting screw on the body of the flush valve counter-clockwise.
b.
Partially close the control stop
c.
Turn the needle valve adjusting screw on the body of the flush valve clockwise.
d.
Fully open the control stop
A
101
The tube through which water flows to refill the flush tank of a water closet discharges near the bottom of the tank primarily to prevent :
Select one:
a.
Sediment from settling on the bottom of the tank
b.
Disturbance of the trap seal
c.
Splashing over the rim of the tank
d.
Noise
D
102
If water runs continuously into the overflow tube in a water closet tank , the fault is in the :
Select one:
a.
Flapper
b.
Trip-lever linkage
c.
Float control valve
d.
Lift wire or guide
C
103
A customer complains of noise and vibration whenever the hot water faucet is turned on. What is the most likely cause ?
Select one:
a.
There is air trapped in the piping
b.
The water is too hot
c.
The water pressure is too high
d.
The compression washer is loose
D
104
If the bypass opening on a direct flush valve were completely blocked, the toilet would :
Select one:
a.
Flush continuously
b.
Not flush at all
c.
Only flush once
d.
Flush sporadically
A
105
The main reason for placing insulation in a water closet tank is :
Select one:
a.
To provide protection for the water closet tank during installation
b.
So the water closet will use less water per flush cycle
c.
To deaden the noise produced by tank operation
d.
To stop condensation from forming on the outside of the water closet tank
D
106
What adjustment would be required for an electronic flush valve if it is being activated by people 6 feet away from it ?
Select one:
a.
Turn the flush valve 90 degree
b.
Replace the flush valve
c.
Shorten the length of the sensor beam
d.
Change the angle of the sensor beam
C
107
How is the flush affected if the orifice bypass screw is partially blocked on a flush valve ?
Select one:
a.
Shorter flush
b.
Continuous flush
c.
Would not flush
d.
Longer flush
D
108
How would the flush be affected if the diaphragm in a flush valve was ruptured ?
Select one:
a.
Continuous flush
b.
Longer flush
c.
Shorter flush
d.
Would not flush
A
109
If a flush tank urinal continues to flush, what is faulty?
Select one:
a.
The siphon
b.
The float control valve
c.
The control stop
d.
The hush tube
A
110
Which device is installed within a hot water tank to prevent corrosion?
Select one:
a.
Vacuum relief
b.
Dip tube
c.
Cathode
d.
Anode
D
111
If both elements are working in a hot water tank but you are receiving insufficient hot water from the tank, what could be the problem?
Select one:
a.
Oversized piping
b.
Broken dip tube
c.
Leaking T&P relief valve
d.
Oversized tank
B
112
What would cause the temperature and pressure relief valve on a natural gas-fired hot water tank to start dripping whenever the burner is operating?
Select one:
a.
A leaking vacuum relief
b.
Waterlogged expansion tank
c.
Faulty T&P relief valve
d.
A broken dip tube
B
113
How would you clean the nozzle (orifice) in a water softener?
Select one:
a.
Soak in an acid solution
b.
Blow it out with air
c.
Soak in brine
d.
Push a wire through it
D
114
what kinda of back siphonage is needed for flush valve
vacuum breaker
115
what kinda of back siphonage is needed for flush tank
atmospheric vacuum breaker (AVB)
