Building water supply Systems

Question 1

The RP, DCVA, and the PVB must be verified by a certified backflow tester when:

A) The architect requires it
B) A city council member requires it
C) The chief medical officer requires it
D) The contractor requires it
E) The local enforcing water supplier requires it

Answer 1

E) The local enforcing water supplier requires it

Question 2

The back flow prevention method that consists of two independently acting check valves that close if the supply pressure is lower than the downstream pressure is called:

A) RP (Reduced Pressure)
B) DCVA (Double Check Valve)
C) Atmospheric Vacuum breaker
D) PVB (Pressure Vacuum Breaker)
E) Air gap backflow device

Answer 2

B) DCVA (Double Check Valve)

Question 3

A hot water mixing valve is a:

A) Four way valve
B) Gate valve
C) Two way valve
D) Flow through valve
E) Three way valve

Answer 3

E) Three way valve

Question 4

The building water supply system which has a storage tank above the highest fixture in the system is called a/an:

A) Direct pressure system
B) Downfeed system
C) Tankless constant pressure system
D) Upfeed system
E) Constant pressure system with suction tank

Answer 4

B) Downfeed system

Question 5

Which of the following statements about non-circulating hot water systems is true?

A) The systems are used in large residential buildings
B) The systems force large amounts of water to be wasted before hot water is available in each fixture
C) The systems contain a differential fire recoil element
D) The systems have a return line
E) The systems eliminate hot water stagnation

Answer 5

B) The systems force large amounts of water to be wasted before hot water is available in each fixture

Question 6

Plumbing codes generally limit the highest pressure permissible in plumbing systems to:

A) 500 kPa
B) 490 kPa
C) 550 kPa
D) 350 kPa
E) 600 kPa

Answer 6

C) 550 kPa

Question 7

Temperature relief devices are effective in eliminating which of the following problems?

A) Scale build-up in the system
B) Venting off air released from water during heating
C) Water stagnation
D) Flashing of water into steam when faucets are opened
E) Inadequate heating of the water

Answer 7

D) Flashing of water into steam when faucets are opened

Question 8

The back flow prevention method which consists of two independently acting check valves with an automatic operating pressure differential relief valve located between the two check valves is called:

A) Reduced pressure principle device
B) PVB
C) Atmosphere vacuum breaker
D) Double check valve
E) Air gap back flow prevention

Answer 8

A) Reduced pressure principle device

Question 9

Hot water mixing valves are controlled by an aquastat connected to the:

A) Cold water supply line
B) Blended water return line
C) Hot water return line
D) High temperature side of the valve
E) Low temperature side of the valve

Answer 9

E) Low temperature side of the valve

Question 10

A flushometer valve:

A) Is operated by vacuum
B) Is only used on urinals
C) Provides an air gap and a vacuum breaker between potable water and unsanitary systems
D) Records the number of plumbing fixture flushes per day
E) Measures the amount of water discharged from water closets per day

Answer 10

C) Provides an air gap and a vacuum breaker between potable water and unsanitary systems