Back Flow Practice Test questions with accurate
answers
A back siphonage vacuum breaker is approved backflow protection for:
A. back pressure- low hazard only
B. back siphonage- intermittent pressure only
C. back pressure- continuous pressure
D. back siphonage- high hazard only
E. back siphonage- continuous pressure Ans✓✓✓ B. back siphonage-
intermittent pressure only
A connection made to the potable water system whereby the risk from
backflow occuring would be limited to the pollution of the potable water
with objectionable but nontoxic substances.
A. health hazard (low)
B. health hazard (High)
C. pollution
D. contamination Ans✓✓✓ A. Health Hazard (Low)
A determination on whether the substance in the nonpotable system is
toxic or nontoxic
A. degree of hazard
B. health hazard (high)
C. health hazard (low)
D. toxic substance Ans✓✓✓ A. degree of hazard
,A device installed in the potable water supply to a system that contains a
pullutant or contaminant to prevent backflow into the potable water
system within the facility
A. backflow
B. backflow prevention device
C. backflow pressure backflow
D. isolation backflow device Ans✓✓✓ D. isolation backflow device
A double check valve assembly is approved for:
A. low hazard- back siphonage only
B. low hazard- back pressure only
C. low hazard- back pressure and back siphonage
D. high hazard- back siphonage only
E. high hazard- back pressure and back siphonage Ans✓✓✓ C. low
hazard- back pressure and back siphonage
A leak in the underground water distribution piping may:
A. allow the contamination of the system from backflow
B. be the result of a fouled backflow preventer
C. increase the system pressure at the point of the leak
D. not be considered a cross contamination Ans✓✓✓ A. allow the
contamination of the system from backflow
, A mechanical device consisting of a float check valve and an air inlet
port designed to prevent backsiphonage
A. back flow
B. pollution
C. air gap
D. atmospheric vacuum breaker Ans✓✓✓ D. atmospheric vacuum
breaker
A reduced pressure principle assembly relief valve senses the supply
pressure and the:
A. supply to number one shut off valve
B. supply to the number two check valve
C. supply to the number two shut off valve
D. supply to outlet shut off valve
E. supply to the number one check valve Ans✓✓✓ B. supply to the
number two check valve
All backflow preventer check valves must be drip tight when the:
A. when the supply pressure drops below 8 p.s.i
B. positive differential is less than 2 p.s.i
C. tester creates a venturi during the test
D. device is subjected to any backflow
E. inlet shut off valve is closed before the outlet valve Ans✓✓✓ D.
device is subjected to any backflow
answers
A back siphonage vacuum breaker is approved backflow protection for:
A. back pressure- low hazard only
B. back siphonage- intermittent pressure only
C. back pressure- continuous pressure
D. back siphonage- high hazard only
E. back siphonage- continuous pressure Ans✓✓✓ B. back siphonage-
intermittent pressure only
A connection made to the potable water system whereby the risk from
backflow occuring would be limited to the pollution of the potable water
with objectionable but nontoxic substances.
A. health hazard (low)
B. health hazard (High)
C. pollution
D. contamination Ans✓✓✓ A. Health Hazard (Low)
A determination on whether the substance in the nonpotable system is
toxic or nontoxic
A. degree of hazard
B. health hazard (high)
C. health hazard (low)
D. toxic substance Ans✓✓✓ A. degree of hazard
,A device installed in the potable water supply to a system that contains a
pullutant or contaminant to prevent backflow into the potable water
system within the facility
A. backflow
B. backflow prevention device
C. backflow pressure backflow
D. isolation backflow device Ans✓✓✓ D. isolation backflow device
A double check valve assembly is approved for:
A. low hazard- back siphonage only
B. low hazard- back pressure only
C. low hazard- back pressure and back siphonage
D. high hazard- back siphonage only
E. high hazard- back pressure and back siphonage Ans✓✓✓ C. low
hazard- back pressure and back siphonage
A leak in the underground water distribution piping may:
A. allow the contamination of the system from backflow
B. be the result of a fouled backflow preventer
C. increase the system pressure at the point of the leak
D. not be considered a cross contamination Ans✓✓✓ A. allow the
contamination of the system from backflow
, A mechanical device consisting of a float check valve and an air inlet
port designed to prevent backsiphonage
A. back flow
B. pollution
C. air gap
D. atmospheric vacuum breaker Ans✓✓✓ D. atmospheric vacuum
breaker
A reduced pressure principle assembly relief valve senses the supply
pressure and the:
A. supply to number one shut off valve
B. supply to the number two check valve
C. supply to the number two shut off valve
D. supply to outlet shut off valve
E. supply to the number one check valve Ans✓✓✓ B. supply to the
number two check valve
All backflow preventer check valves must be drip tight when the:
A. when the supply pressure drops below 8 p.s.i
B. positive differential is less than 2 p.s.i
C. tester creates a venturi during the test
D. device is subjected to any backflow
E. inlet shut off valve is closed before the outlet valve Ans✓✓✓ D.
device is subjected to any backflow
