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Book 2 PanGlobal Assessment Test > Chapter 12 : Building Water Supply Systems > Flashcards

Chapter 12 : Building Water Supply Systems Flashcards

1
Q 
1.	Pressure reducing valves are placed on each floor where the pressure in the supply line exceeds:
A.	150 kPa (22 psi)
B.	450 kPa (65 psi)
C.	350 kPa (51 psi)
D.	550 kPa (80 psi)
E.	250 kPa (36 psi)
A

D. 550 kPa (80 psi)

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2
Q 
2.	Most municipal water systems distribute water at pressures between:
A.	350 kPa (50 psi) and 420 kPa (60 psi)
B.	250 kPa (36 psi) and 320 kPa (46 psi)
C.	150 kPa (22 psi) and 220 kPa (32 psi)
D.	450 kPa (65 psi) and 520 kPa (75 psi)
E.	550 kPa (80 psi) and 620 kPa (90 psi)
A

A. 350 kPa (50 psi) and 420 kPa (60 psi)

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3
Q 
3.	As water moves vertically up the risers in the building it will lose approximately \_\_\_\_\_ for every meter (for every foot) in elevation.
A.	10 kPa (1.5 psi)
B.	5 kPa (0.7 psi)
C.	15 kPa (2 psi)
D.	25 kPa (3.6 psi)
E.	20 kPa (2.9 psi)
A

A. 10 kPa (1.5 psi)

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4
Q 
4.	The combination pressure and temperature relief valve opens when the temperature of \_\_\_\_\_ is reached.
A.	90°C (194°F)
B.	99°C (210°F)
C.	103°C (217°F)
D.	105°C (221°F)
E.	110°C (230°F)
A

B. 99°C (210°F)

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5
Q 
5.	The temperature relief device opens when the water temperature rises too approximately:
A.	90°C (194°F)
B.	110°C (230°F)
C.	103°C (217°F)
D.	105°C (221°F)
E.	99°C (210°F
A

E. 99°C (210°F

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6
Q 
6.	Hot water between \_\_\_\_\_ is used for domestic purposes in the building.
A.	60°C (140°F) and 70°C (158°F)
B.	40°C (104°F) and 50°C (120°F)
C.	80°C (176°F) and 90°C (194°F)
D.	70°C (158°F) and 80°C (176°F)
E.	50°C (120°F) and 60°C (140°F)
A

E. 50°C (120°F) and 60°C (140°F)

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7
Q 
7.	Most plumbing fixtures need a minimum of \_\_\_\_\_ water flow pressure.
A.	90 kPa (14 psi)
B.	100 kPa (14.5 psi)
C.	110 kPa (15 psi)
D.	120 kPa (17.5 psi)
E.	130 kPa (19 psi)
A

C. 110 kPa (15 psi)

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8
Q
  1. The pounding or banging of pipes and shuddering of fixtures caused by a shock wave resulting from a sudden stop of water flow in a pipe is:
    A. The release of entrapped air
    B. The pump discharge valve slamming shut
    C. Water hammer
    D. The sudden stoppage of flow
    E. Thermal expansion
A

C. Water hammer

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9
Q 
9.	Plumbing codes limit the highest water pressure allowed in plumbing systems to;
A.	450 kPa (65 psi)
B.	550 kPa (80 psi)
C.	350 kPa (50 psi)
D.	250 kPa (36 psi)
E.	150 kPa (22 psi)
A

B. 550 kPa (80 psi)

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10
Q 
10.	The reduced pressure principal device consists of two independently acting check valves with an automatic operating \_\_\_\_\_ valve located between the two check valves.
A.	Pressure
B.	Pressure reducing
C.	Pressure increasing
D.	Pressure differential relief
E.	Temperature differential relief
A

D. Pressure differential relief

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11
Q 
11.	The pressure system with pneumatic tank typically has a pump on/off pressure differential of:
A.	100 kPa (14.5 psi)
B.	120 kPa (17.4 psi)
C.	140 kPa (20 psi)
D.	160 kPa (23.2 psi)
E.	180 kPa (26 psi)
A

C. 140 kPa (20 psi)

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12
Q 
12.	In the \_\_\_\_\_ system water is obtained directly from a municipal distribution system or from a private supply at approximately 420 kPa (60 psi).
A.	Tankless constant pressure
B.	Tank variable pressure
C.	Indirect constant pressure
D.	Direct pressure
E.	Pressure with pneumatic tank
A

D. Direct pressure

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13
Q 
13.	In the \_\_\_\_\_ system water enters directly into the pump suction is discharged into a pressurized tank from there it flows into the building cold water system.
A.	Tank variable pressure
B.	Pressure with pneumatic tank
C.	Indirect constant pressure
D.	Direct pressure
E.	Tankless constant pressure
A

B. Pressure with pneumatic tank

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14
Q 
14.	One of the methods employed to prevent backflow and control the cross connections is the:
A.	Air globe
B.	Reduced temperature principal device
C.	Double check breaker
D.	Temperature vacuum breaker
E.	Atmospheric vacuum breaker
A

E. Atmospheric vacuum breaker

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15
Q 
15.	One of the methods employed to prevent backflow and control the cross connections is the:
A.	Air globe
B.	Reduced temperature principal device
C.	Double check breaker
D.	Pressure vacuum breaker
E.	Atmospheric valve breaker
A

D. Pressure vacuum breaker

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16
Q 
16.	A common type of water heater that incorporates an automatic gas-fired storage heater and features a single tank used for both heating and storing the water is the:
A.	Instantaneous indirect heater
B.	Indirect hot water heater
C.	Direct hot water heater
D.	Instantaneous heater
E.	Direct instantaneous hot water heater
A

C. Direct hot water heater

17
Q 
17.	The pressure vacuum breaker consists of a single body containing a spring-loaded check valve and an internally loaded vacuum breaker that \_\_\_\_\_ whenever the pressure within the body approaches atmospheric pressure.
A.	Opens to admit air
B.	Closes to admit air
C.	Opens to admit water
D.	Closes to admit water
E.	Opens to release pressure
A

A. Opens to admit air

18
Q
  1. Pressure relief devices are effective in eliminating which of the following problem.
    A. Scale build-up in the system
    B. Venting off air released from water during heating
    C. Over pressure in the system
    D. Inadequate heating of the water
    E. Flashing of water into steam when faucets are opened
A

C. Over pressure in the system

19
Q
  1. Temperature relief devices are effective in eliminating which of the following problem.
    A. Scale build-up in the system
    B. Venting off air released from water during heating
    C. Inadequate heating of the water
    D. Flashing of water into steam when faucets are opened
    E. Over pressure in the system
A

D. Flashing of water into steam when faucets are opened

20
Q 
20.	The double check valve consists of two independently acting check valves that close in a pressure differential if the supply pressure is lower than the:
A.	Downstream temperature
B.	Upstream pressure
C.	Upstream temperature
D.	Downstream volume
E.	Downstream pressure
A

E. Downstream pressure

21
Q 
21.	An air gap is a physical separation between the free flowing discharge end of a potable water pipe and an open or non-pressure receiving vessel such as a:
A.	Boiler
B.	Process vessel
C.	Sink or a bathtub
D.	Mixing vat
E.	Storage tank
A

C. Sink or a bathtub

Book 2 PanGlobal Assessment Test (40 decks)

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