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IP Plumbing Review > Review #2 A + B > Flashcards

Review #2 A + B Flashcards

1
Q

An electric hot water tank with immersion elements is considered to be

A

100 % efficient
(all heat from element is transferred to the water)

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2
Q

An instantaneous hot water heater has a _____ that activates the burner when water is drawn.

A

Control valve

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3
Q

A baffle is often placed in the flue passage if a centre flue HWT to

A

Slow the exit of hit combustion gases

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4
Q

Which of the following is not found on a T&P relief valve information tag?
A. Size of valve
B. BTU rating of HWT
C. Pressure setting
D. Sensor length

A

B. BTU rating of HWT

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5
Q

Stall urinals are installed

A

During the rough-in stage

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6
Q

A single trap may serve a 3 compartment sink if it is

A

One size larger than the largest fixture outlet pipe

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7
Q

The copper water service pipe to a building should be

A

Type K or L soft copper tube

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8
Q

ABS or PVC horizontal piping must be supported at intervals not exceeding

A

4 feet (1.2 m)

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9
Q

A 1/8 th bend refers to a cast iron fitting used to change direction by

A

45 degrees

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10
Q

When installing a bypass for a pressure reducing valve, it is best to use a _____ valve

A

Globe valve

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11
Q

BCuP brazing alloy may be used to join copper tube to copper fittings
A. Only if flux is also used
B. Only if the copper tube is hard drawn
C. Without using flux
D. Without exceeding 800 ‘F

A

C. Without using flux

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12
Q

The most common cause of the collapse of a hot water tank is

A

Vacuum

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13
Q

What would be the most correct definition of total force?
A. Total weight of water divided by surface area
B. Weight of water times surface area
C. Weight of water per square inch
D. Pressure divided by surface area

A

B. Weight of water times surface area

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14
Q

The maximum length of a disposal field lateral, according to the BC Health Act is

A

100 ft

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15
Q

A pressure tanks main purpose, when used in a rural water supply system, is to

A

Prevent cycling of the pump

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16
Q

The actual lift of a pump is less than the theoretical lift. This is caused by:

A

The loss of efficiency due to friction.
The inability of the pump to create a perfect vacuum.
The changes in atmospheric pressure above sea level.

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17
Q

The minimum diameter of a water service is:

A

3/4”

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18
Q

Threaded drainage fittings installed in a vertical stack are tapped to provide a pitch of ___

A

1/4” per foot

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19
Q

A combined sewer carries

A

Sanitary and storm sewage

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20
Q

The maximum fall on a trap arm from the weir to the vent is

A

1 pipe diameter

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21
Q

The vertical distance between the trap weir and the trap dip is the

A

Trap seal depth

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22
Q

The developed length of a branch vent shall be

A

From its upper end to the farthest downstream fixture that it serves

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23
Q

An ordinary displacement type water meter registers

A

The total flow though the meter

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24
Q

Which of the following meters is two meters in one?
A. Turbine
B. Displacement
C. Oscillating piston
D. Compound

A

D. Compound

Low flow rate: displacement
High flow rate: turbine

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25
Q

To prevent a load of pipe that is being lifted from swinging:

A

A tag line is used

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26
Q

The maximum surface temperature that a hot water radiant floor heating panel should not exceed is

A

80 - 100 ‘F

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27
Q

On a deep well convertible jet pump, the suction line is ____ than the drive line

A

Larger

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28
Q

An ejector nozzle in a deep well convertible jet pump causes water from the well to flow into the ejector by _____ the pressure in the ejector venturi

A

Decreasing

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29
Q

The pitless adapter is located in the well casing below ____

A

The frost line

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30
Q

This control used on a hot water heating system adjusts the boiler water temperature by measuring the outside air temperature

A

Outdoor reset control

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31
Q

This pipe hanger is best suited to allow pipe movement due to heating and cooling of the pipe

A

Rolling hanger

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32
Q

This valve can modulate water temperature in a hydronic heating system.

A

Mixing valve

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33
Q

The material used for medical gas pipelines is

A

Degreased copper

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34
Q

Which of the following pipes has no “makeup” ?
A. Screwed
B. Socket weld
C. No-hub cast iron
D. Sweat copper

A

C. No-hub cast iron

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35
Q

Copper tubing sizes are specified by their

A

Outside diameter

(Tube: inside diameter)

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36
Q

“Sensible heat” is defined as heat required to bring about a change in the

A

Temperature of matter

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37
Q

A valve that prevents liquids from flowing back into a drainage system is known as a

A

Backwater valve

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38
Q

In reference to wire rope clips, the “U” bolt portion of the clip must always be placed

A

On the dead end of the rope

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39
Q

Copper tube used on medical gas systems should arrive on site capped and degreased. If on-site cleaning is required, which chemicals shall be used?

A

Trisodium phosphate

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40
Q

If a solenoid valve is to operate in a system using liquid, how would the valve close?

A

Using electric current and a spring

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41
Q

What is the correct way to shorten the flush of a “flushometer” valve?

A

Turn the needle valve adjusting screw on the body of the flush valve counter-clockwise

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42
Q

The corrosively of water can best be reduced by increasing ____

A

The pH level

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43
Q

A urinal flush tank uses the following method to effect a flush

A

Siphonic action

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44
Q

Backsiphonage from a flush valve operated water closet can be prevented by the installation of a vacuum breaker between the

A

Flush valve and the toilet bowl

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45
Q

Concrete pipe shall not be used

A

Above ground or inside a building

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46
Q

Polyethylene water pipe shall not be used except for

A

Water service pipe

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47
Q

Piping, fittings and joints used in pressure sewer, forcemain or sump pump discharge applications shall be capable of withstanding not less than

A

1 1/2 times the maximum potential pressure

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48
Q

Outlets which cause pressure drops should be provided with regulating valves. The type of valve most likely to be used is

A

Needle valve

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49
Q

The suction lift that a pump can produce depends upon

A

The power of the motor
The diameter of the impeller
The speed of the impeller
Atmospheric Pressure

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50
Q

What condition in water does not contribute to corrosion of the piping?
A. Low pH
B. Calcium sulphate
C. Calcium carbonate
D. Sodium chloride

A

B. Calcium sulphate

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51
Q

The main objective of an air volume control is to maintain the correct

A

Ratio of water to air in the tank

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52
Q

The weir of the trap is

A

The highest portion of the inside lower surface of the trap

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53
Q

A lavatory should not be installed in a place that is liable to be used for washing dishes because

A

Food waste will enter the overflow

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54
Q

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

A

Noise

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55
Q

A water closet tank has a tendency to drip condensation on the floor year round. This could be caused by

A

The difference between the ambient temperature of the air and the water in the tank

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56
Q

Excessively high pressure will cause

A

Noisy flow

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57
Q

A soil-or-waste pipe extending laterally from a soil-or-waste stack and connected at its upstream end to two fixture drains in one storey would be called

A

A branch

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58
Q

The pressure in a sanitary drainage system should not vary more than

A

+/- 1 inch water column

59
Q

The shield on a drinking fountain bubbler serves the following purpose

A

Prevents contamination of the nozzle

60
Q

If a SOW stack passes through two storeys and has seven WC draining to it, what is the minimum permissible size of the stack?

A

4”

61
Q

Every roof drain shall be securely connected to a leader and provisions shall be made for

A

Expansion and contraction

62
Q

The maximum spacing of supports for vertical piping shall be

A

7.5m (24 ft)

63
Q

PVC water pipe and fittings shall not be used for

A

Hot water systems

64
Q

Polychloroprene flashing for vent pipes shall be a minimum thickness of

A

2.89 mm

65
Q

What is the minimum size branch vent for (2) bathroom groups if the vent has a developed length of 7m?

A

1 1/2”

66
Q

What is the maximum number of shower heads that may be served by a single shower drain?

A

6

67
Q

ABS or PVC are classified as which type of plastic?

A

Thermoplastic

68
Q

A relief vent is required under certain conditions when a SOW stack changes direction vertically more than

A

45 degrees

69
Q

ABS plastic pipe installed nominally horizontal shall be supported at intervals not exceeding

A

1.2 m

70
Q

When a water test is made on the drainage system, the piping shall be kept filled with water for ___ min

A

15 min

71
Q

When an air test is made on the potable water system, the system shall withstand an air pressure of 700 kPa for at least ___ min

A

120 min

72
Q

The location and grade on a benchmark shown on a site plan denotes the

A

Base point from which levels are measured

73
Q

A flow switch may be found in which of the following systems?

A

Hot water heating
Fire sprinkler
Hose and standpipe

74
Q

A grease interceptor from a 3 compartment pot sink shall be installed so that it’s vent is not more than _____ away.

A

2.4 m (8 ft)

75
Q

What is the process that draws solder into a joint know as?

A

Capillary action

76
Q

The type of waste connection that would be utilized when installing a potato peeler is

A

Indirect connection

77
Q

Which type of copper tube will withstand the greatest bursting pressure?

A

Type K

78
Q

P = H x D

A

P= pressure in lb/in2
H = height of a column of water in ft
D = density of water per cubic inch

79
Q

A fixture drain is

A

A pipe connecting a trap to another part of the drainage system

80
Q

The theoretical lift of a pump is directly related to

A

The atmospheric pressure

81
Q

A pump that is connected to a pressure tank starts and stops frequently. This is probably due to

A

Waterlogging of the tank

82
Q

Asbestos-cement pipe is commonly referred to as

A

White pipe or transit pipe

83
Q

Drainage piping of 3” diameter and smaller must grade at least

A

1/4” per foot

84
Q

The minimum water seal of a ptrap is

A

1 1/2” (38 mm)

Acid = 50mm

85
Q

Plumbing drains are designed to run ______ full for adequate airflow

A

1/2 to 2/3

86
Q

A “PO” plug stands for

A

Patented overflow

87
Q

Developed length means

A

The distance along the centreline of the piping

88
Q

The maximum surface temperature that a hot water radiant floor heating panel should not exceed is

A

80 - 100 ‘F

89
Q

Nominal pipe size refers to pipe sizes

A

1/8” to 12” (7-300 mm)

90
Q

The horizontal piping, including any vertical offset that conducts sewage, clear water waste or storm water to a building sewer is know as

A

Building drain

91
Q

The length of a continuous vent is determined by its

A

Developed length from its connection with a soil-or-waste pipe to where it connects to a stack vent, vent stack, vent header or to open air

92
Q

The condition that would make it necessary to use a vent header on a plumbing installation would be

A

2 or more vent stacks

93
Q

The minimum diameter of individual vent for a 2” trap is

A

1 1/2”

94
Q

The minimum protection for cross connection control used on an irrigation system that is directly connected to the water supply system would be

A

Atmospheric vacuum breaker

95
Q

Which of the following metals can be classified as ferrous?
A. Copper
B. Lead
C. Cast iron
D. Bronze

A

C. Cast iron

96
Q

Which two metals will suffer the most from corrosion due to electrochemical action?

A

Copper and iron

97
Q

When you install a mechanical pop-up on a basin, the pullup rod would be best adjusted so it’s knob is

A

Between 1/4” and 1/2” above the faucet body when the plug is fully open

98
Q

A 1/2” pipe, threaded correctly, will have an effective thread length of

A

Approximately 1/2”

99
Q

Annealing copper tube means to make it ____

A

Soft

100
Q

Which of the following is most destructive to both glass and vitrified clay pipe?
A. Chlorinated compounds
B. Hydroflouric acid
C. Hydrochloric acid
D. Nitric acid

A

B. Hydroflouric acid

101
Q

Which term means a pipe that connects the waste opening of a fixture to the trap serving the fixture?

A

Fixture outlet pipe

102
Q

The application for a plumbing permit accompanied by plumbing drawings shall show a layout of the potable water distribution system including the

A

Pipe sizes and valves

103
Q

In a case of conflict between the provisions of the plumbing code and those of a referenced document, the _______ shall govern

A

Provisions of the code

104
Q

The highest part of the lower interior surface of a trap

A

Trap weir

105
Q

A vent pipe that is connected at its upper end to a vent header it is terminated in outside air and that is used to limit the pressure differential in a SOW stack

A

Vent stack

106
Q

A vent pipe that also serves as a soil-or-waste pipe?

A

Wet vent

107
Q

What is required when a SOW stack receives discharge from fixtures located on more than 11 stories?

A

A yoke vent

108
Q

The trap seal refers to the vertical distance measured from the

A

Trap weir to the trap dip

109
Q

Which fixture operates on an intermittent siphon?

A

Urinal flush tank

110
Q

A flush valve is commonly installed in place of a flush tank on water closets for commercial and industrial use because

A

It has more rapid flushing action

111
Q

A double sanitary tee fitting shall not be used to connect the trap arms of

A

Back outlet water closets installed back to back

112
Q

A deep well jet pump with a partially clogged jet would cause

A

A high vacuum reading in the suction line

113
Q

When a minus pressure is created in a drainage system by the discharging of another fixture, loss of trap seal occurs by

A

Momentum siphonage

114
Q

The minimum design rate of flow in a building sewer is considered to be approximately

A

Two feet per second

115
Q

When a shallow well pump starts it reduces _____ in the drop pipe

A

Atmospheric pressure

116
Q

The types of copper tubing recommended for a water service is

A

Type L or K (soft)

117
Q

Self closing faucets are used essentially to

A

Prevent waste of water

118
Q

The water closet bowl that comes in wall outlet type only is

A

Blowout

119
Q

The size of an air break shall be

A

1” or equal to the size of the fixture drain

120
Q

This backflow preventer is only suitable as protection against backsiphonage

A

AVB

121
Q

A vent must terminate no less than ____ above a fresh air inlet

A

3’ (1 m)

122
Q

A relief vent is required when more than ____ FU discharge past a circuit-vented branch?

A

6

123
Q

A vent stack is required when fixtures drain to a stack that is more than ____ storeys in height

A

4

124
Q

Soft temper copper tube shall be supported at intervals not exceeding

A

2.5m

125
Q

A die marked as 5/8” NC (national coarse) would be used for threading

A

Mild steel rod

126
Q

Which type of water meter would be best suited to an installation with both large peak flows and relatively low flows?

A

Compound

127
Q

A standard pipe thread cut is cut at an angle of

A

60 degrees

128
Q

A flow switch may be found in which systems?

A

Hot water heating
Fire sprinkler
Hose and standpipe

129
Q

Seals of properly vented legal traps may be broken by

A

Evaporation

130
Q

The venting of a plumbing system is for the purpose of

A

Preventing trap siphonage and preventing loss of seal by back pressure

131
Q

There are two types of wheels on the cutter arms of the internal glass cutter. One is called the cutter wheel and the other is the

A

Follower

132
Q

What size pipe wrench is recommended when installing 32 mm (1 1/4”) and 38 mm (1 1/2”) threaded pipe?

A

46 cm (18”)

133
Q

Name of the tool used to measure the diameter of a pipe groove?

A

Pi tape

134
Q

The maximum distance from the face of a grinding wheel to the tool rest should be

A

3 mm (1/8”)

135
Q

A one metre high column of water over a base area of one square metre will exert how much pressure in kPa?

A

9.81 kPa

136
Q

What is the minimum height of a guardrail?

A

1020 mm (40”)

137
Q

When several ropes are to be attached to a single hook, the connection to the hook is to be made with a

A

Shackle

138
Q

How is the mechanical advantage of a hydraulic Jack determined?

A

By the ratio of the pump piston’s diameter to the lifting piston’s diameter

139
Q

What is the circulation in a gravity system caused by?

A

The difference in the water densities in the system

140
Q

The quantity of heat required to raise or lower the temperature of one pound of water by one degree Fahrenheit

A

Btu

141
Q

When is a heating system in “thermal equilibrium” ?

A

When heat loss equals heat added

142
Q

What is the maximum water temperature permitted to a bathtub or shower head?

A

49 ‘C (120 ‘F)

143
Q

What is the maximum designed flush cycle for a high-efficiency toilet?

A

4.8 L

IP Plumbing Review (7 decks)

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