BACKFLOW PREVENTION ASSEMBLY ACTUAL
EXAM PAPER 2026 COMPLETE QUESTIONS
AND SOLUTIONS 100% CORRECT
● What is an Air Gap? Answer: The unobstructed vertical distance
through the free atmosphere between the lowest opening from any pipe
or outlet supplying water to a tank, plumbing fixture, or other container,
and the overflow rim of that container
● What does AVB stand for? Answer: Atmospheric Vacuum Breaker
● What is an Atmospheric Vacuum Breaker? Answer: A mechanical
device consisting of a float check valve and an air-inlet port designed to
prevent backsiphonage
● What is an auxiliary supply? Answer: Any water source or system,
other than the potable water supply, that may be available in the building
or premises
● What is backflow? Answer: A hydraulic condition, caused by
difference in pressures, in which non-potable water or other fluids flow
into a potable water system
, ● What is backpressure? Answer: A backflow condition in which a
pump, elevated tank, boiler, 0r other means results in a downstream
pressure greater than the supply pressure
● What is backsiphange? Answer: A backflow condition in which the
pressure in the distribution system is less than atmospheric pressure
(sub-atmospheric)
● What is a bypass? Answer: In cross-connection control, any pipe
arrangement that passes water around a protective device, casing it to be
ineffective
● What is the purpose of a check valve? Answer: To allow flow in only
one direction
● What is a cross connection? Answer: Any arrangement of pipes,
fittings, fixtures, or devices that connects a non-potable system to a
potable water system
● What does DCVA stand for? Answer: Double Check Valve Assembly
● What is a DCVA? Answer: A testable mechanical device consisting of
two independently operating, spring-loaded check valves
EXAM PAPER 2026 COMPLETE QUESTIONS
AND SOLUTIONS 100% CORRECT
● What is an Air Gap? Answer: The unobstructed vertical distance
through the free atmosphere between the lowest opening from any pipe
or outlet supplying water to a tank, plumbing fixture, or other container,
and the overflow rim of that container
● What does AVB stand for? Answer: Atmospheric Vacuum Breaker
● What is an Atmospheric Vacuum Breaker? Answer: A mechanical
device consisting of a float check valve and an air-inlet port designed to
prevent backsiphonage
● What is an auxiliary supply? Answer: Any water source or system,
other than the potable water supply, that may be available in the building
or premises
● What is backflow? Answer: A hydraulic condition, caused by
difference in pressures, in which non-potable water or other fluids flow
into a potable water system
, ● What is backpressure? Answer: A backflow condition in which a
pump, elevated tank, boiler, 0r other means results in a downstream
pressure greater than the supply pressure
● What is backsiphange? Answer: A backflow condition in which the
pressure in the distribution system is less than atmospheric pressure
(sub-atmospheric)
● What is a bypass? Answer: In cross-connection control, any pipe
arrangement that passes water around a protective device, casing it to be
ineffective
● What is the purpose of a check valve? Answer: To allow flow in only
one direction
● What is a cross connection? Answer: Any arrangement of pipes,
fittings, fixtures, or devices that connects a non-potable system to a
potable water system
● What does DCVA stand for? Answer: Double Check Valve Assembly
● What is a DCVA? Answer: A testable mechanical device consisting of
two independently operating, spring-loaded check valves
