Back Flow Practice Test
The unintentional reversal of flow in a potable water system which may result in
contamination or pollution of the system.
A. cross connection
B. backflow
C. backpressure backgflow
D. backsiphonage backflow - ANS-B. Backflow
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 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)
Any device, method, or construction used to prevent the backward flow of liquids, solids,
or gases into potable distribution system.
A. backflow prevention device
B. air gap
C. isolution backflow device
D. backsiphonage backflow - ANS-A. backflow prevention device
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
,The reversal of normal flow in a system caused by a negative pressure (vacuum or
partial vacuum) in the supply piping.
A. atmostpheric vacuum breaker
B. backflow
C. backsiphonage backflow
D. backpressure backflow - ANS-C. backsiphonage backflow
Does not constitute an actual health hazard although the quality of the water is impaired
with respect to taste, odor, or utility.
A. health hazard (high)
B. pulution
C. degree of hazard
D. toxic substance - ANS-B. pollution
Any liquid, solid, or gas, which when introduced into the water supply, creates, or may
create, a danger to the health and well being of the consumer.
A. contamination
B. Health hazard (high)
C. health hazard (low)
D. toxic substance - ANS-D. toxic substance
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
The unobstructed vertical distance through the free atmosphere between the lowest
opening from any pipe or outlet supplying water to a tank, and plumbing fixture.
A. air gap
B. submerged inlet
C. backflow
D. cross connection - ANS-A. air gap
An arrangement of pipes, fittings, or devices that introduces potable water into a
nonpotable system below the flood level rim of a receptacle
A. inlet
B. outlet
C. submerged inlet
D. submerged outlet - ANS-C. submerged inlet
, Does constitute an actual health hazard, the consumer being subjected to potentially
lethal waterborne disease or illness
A. degree of hazard
B. contamination
C. pollution
D. toxic substance - ANS-B. contamination
Any arrangement of pipes, fittings, fixtures, or devices that connects a nonpotable
system to a potable water system.
A. cross connection
B. criss siphonage
C. backflow
D. degree of hazard - ANS-A. cross connection
The reversal of normal flow in a system due to an increase in the downstream pressure
above that of the supply pressure.
A. backpressure backflow
B. backsiphonage backflow
C. backflow
D. backflow - ANS-A. backpressure backflow
An actual or potential threat of contamination of a physical or toxic nature to the potable
water system to such a degree that there would be a danger to health.
A. health hazard (high)
B. health hazard (low)
C. pollution
D. contamination - ANS-A. health hazard (high)
Anti-siphon type water closer flush tank ballcock:
A. 1002
B. 1003
C. 1001
D. 1011 - ANS-A. 1002
Reduce pressure principle backflow preventer
A. 1024
B. 1015
C. 1014
D. 1013 - ANS-D. 1013
The unintentional reversal of flow in a potable water system which may result in
contamination or pollution of the system.
A. cross connection
B. backflow
C. backpressure backgflow
D. backsiphonage backflow - ANS-B. Backflow
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 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)
Any device, method, or construction used to prevent the backward flow of liquids, solids,
or gases into potable distribution system.
A. backflow prevention device
B. air gap
C. isolution backflow device
D. backsiphonage backflow - ANS-A. backflow prevention device
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
,The reversal of normal flow in a system caused by a negative pressure (vacuum or
partial vacuum) in the supply piping.
A. atmostpheric vacuum breaker
B. backflow
C. backsiphonage backflow
D. backpressure backflow - ANS-C. backsiphonage backflow
Does not constitute an actual health hazard although the quality of the water is impaired
with respect to taste, odor, or utility.
A. health hazard (high)
B. pulution
C. degree of hazard
D. toxic substance - ANS-B. pollution
Any liquid, solid, or gas, which when introduced into the water supply, creates, or may
create, a danger to the health and well being of the consumer.
A. contamination
B. Health hazard (high)
C. health hazard (low)
D. toxic substance - ANS-D. toxic substance
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
The unobstructed vertical distance through the free atmosphere between the lowest
opening from any pipe or outlet supplying water to a tank, and plumbing fixture.
A. air gap
B. submerged inlet
C. backflow
D. cross connection - ANS-A. air gap
An arrangement of pipes, fittings, or devices that introduces potable water into a
nonpotable system below the flood level rim of a receptacle
A. inlet
B. outlet
C. submerged inlet
D. submerged outlet - ANS-C. submerged inlet
, Does constitute an actual health hazard, the consumer being subjected to potentially
lethal waterborne disease or illness
A. degree of hazard
B. contamination
C. pollution
D. toxic substance - ANS-B. contamination
Any arrangement of pipes, fittings, fixtures, or devices that connects a nonpotable
system to a potable water system.
A. cross connection
B. criss siphonage
C. backflow
D. degree of hazard - ANS-A. cross connection
The reversal of normal flow in a system due to an increase in the downstream pressure
above that of the supply pressure.
A. backpressure backflow
B. backsiphonage backflow
C. backflow
D. backflow - ANS-A. backpressure backflow
An actual or potential threat of contamination of a physical or toxic nature to the potable
water system to such a degree that there would be a danger to health.
A. health hazard (high)
B. health hazard (low)
C. pollution
D. contamination - ANS-A. health hazard (high)
Anti-siphon type water closer flush tank ballcock:
A. 1002
B. 1003
C. 1001
D. 1011 - ANS-A. 1002
Reduce pressure principle backflow preventer
A. 1024
B. 1015
C. 1014
D. 1013 - ANS-D. 1013
