Backflow Test Questions and Answers 100%
Correct | Updated 2024-2025
IT IS POSSIBLE FOR A PERFECT VACUUM AT SEA LEVEL TO RAISE WATER IN A PIPE
APPROXIMATELY _________ FEET. - ANSWER 34
6. WHICH OF THE FOLLOWING CONDITIONS COULD RESULT IN WATER
CONTAMINATION THROUGH A CROSS-CONNECTION?
A) A VACUUM CREATED BY THE IMPROPER USE OF WATER HAMMER ARRESTERS
B) THE USE OF SELF CLOSING LAVATORY FAUCETS
C) TURNING OFF SERVICE TO A MULTI-STORY BUILDING AND ALLOWING THE
WATER SUPPLY TO DRAIN
D) A VACUUM CREATED BY THE USE OF QUICK CLOSING VALVES ON THE LOWER
FLOORS OF A BUILDING EXCEEDING TEN (10) FLOORS IN HEIGHT
E) THE INSTALLATION OF WATER CONSERVING FIXTURES, INTO A BUILDING
DESIGNED PRIOR TO THEIR REQUIRED US - ANSWER C) TURNING OFF
SERVICE TO A MULTI-STORY BUILDING AND ALLOWING THE WATER SUPPLY TO
DRAIN
THE VENTURI EFFECT STATES THAT WHEN THE WATER VELOCITY WITHIN THE PIPE
INCREASES, THE PRESSURE: - ANSWER DECREASES
THE FEDERAL LAW PLACING RESPONSIBILITY FOR THE PROTECTION OF THE
PUBLIC WATER SUPPLY ON THE PURVEYOR OF WATER IS THE: - ANSWER
SAFE DRINKING WATER ACT
HOW MANY INCHES MUST A PRESSURE TYPE VACUUM BREAKER ASSEMBLY BE
INSTALLED ABOVE ALL DOWNSTREAM PIPING - ANSWER 12
, THE TERM "APPROVED REDUCED PRESSURE PRINCIPLE ASSEMBLY", APPLIES TO
AN ASSEMBLY WITH TWO SHUT-OFF VALVES, FOUR TEST COCKS AND: -
ANSWER TWO APPROVED CHECK VALVES AND A DIFFERENTIAL PRESSURE
RELIEF VALVE
UNDERSIZED WATER PIPING CARRYING WATER AT HIGH VELOCITY CAN CAUSE
BACKSIPHONAGE DUE TO: - ANSWER THE ASPIRATOR EFFECT
AN AIR GAP SEPARATION IS MEASURED FROM THE OUTLET OF THE DISCHARGE
PIPE, TO THE: - ANSWER FLOOD LEVEL RIM
THE TYPE OF PROTECTION REQUIRED FOR A CLOSED LOOP HEATING SYSTEM
CONTAINING CHEMICALS IS - ANSWER REDUCED PRESSURE PRINCIPLE
ASSEMBLY
FOR CONTAINMENT PROTECTION IN A NON-HEALTH HAZARD SITUATION, THE
MINIMUM PROTECTION REQUIRED SHALL BE - ANSWER DOUBLE CHECK
BACKFLOW PREVENTION ASSEMBLY
WATER CONTINUOUSLY LEAKING FROM TEST COCK #2 DURING A TEST
PROCEDURE OF A PRESSURE VACUUM BREAKER ASSEMBLY IS PROBABLY CAUSED
BY A LEAKING - ANSWER INLET SHUT-OFF VALVE #1
WHAT IS THE PROBABLE CAUSE OF A RELIEF VALVE FAILING TO OPEN DURING A
FIELD TEST ON A REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER? -
ANSWER MALFUNCTION OF THE RELIEF VALVE MECHANISM
Correct | Updated 2024-2025
IT IS POSSIBLE FOR A PERFECT VACUUM AT SEA LEVEL TO RAISE WATER IN A PIPE
APPROXIMATELY _________ FEET. - ANSWER 34
6. WHICH OF THE FOLLOWING CONDITIONS COULD RESULT IN WATER
CONTAMINATION THROUGH A CROSS-CONNECTION?
A) A VACUUM CREATED BY THE IMPROPER USE OF WATER HAMMER ARRESTERS
B) THE USE OF SELF CLOSING LAVATORY FAUCETS
C) TURNING OFF SERVICE TO A MULTI-STORY BUILDING AND ALLOWING THE
WATER SUPPLY TO DRAIN
D) A VACUUM CREATED BY THE USE OF QUICK CLOSING VALVES ON THE LOWER
FLOORS OF A BUILDING EXCEEDING TEN (10) FLOORS IN HEIGHT
E) THE INSTALLATION OF WATER CONSERVING FIXTURES, INTO A BUILDING
DESIGNED PRIOR TO THEIR REQUIRED US - ANSWER C) TURNING OFF
SERVICE TO A MULTI-STORY BUILDING AND ALLOWING THE WATER SUPPLY TO
DRAIN
THE VENTURI EFFECT STATES THAT WHEN THE WATER VELOCITY WITHIN THE PIPE
INCREASES, THE PRESSURE: - ANSWER DECREASES
THE FEDERAL LAW PLACING RESPONSIBILITY FOR THE PROTECTION OF THE
PUBLIC WATER SUPPLY ON THE PURVEYOR OF WATER IS THE: - ANSWER
SAFE DRINKING WATER ACT
HOW MANY INCHES MUST A PRESSURE TYPE VACUUM BREAKER ASSEMBLY BE
INSTALLED ABOVE ALL DOWNSTREAM PIPING - ANSWER 12
, THE TERM "APPROVED REDUCED PRESSURE PRINCIPLE ASSEMBLY", APPLIES TO
AN ASSEMBLY WITH TWO SHUT-OFF VALVES, FOUR TEST COCKS AND: -
ANSWER TWO APPROVED CHECK VALVES AND A DIFFERENTIAL PRESSURE
RELIEF VALVE
UNDERSIZED WATER PIPING CARRYING WATER AT HIGH VELOCITY CAN CAUSE
BACKSIPHONAGE DUE TO: - ANSWER THE ASPIRATOR EFFECT
AN AIR GAP SEPARATION IS MEASURED FROM THE OUTLET OF THE DISCHARGE
PIPE, TO THE: - ANSWER FLOOD LEVEL RIM
THE TYPE OF PROTECTION REQUIRED FOR A CLOSED LOOP HEATING SYSTEM
CONTAINING CHEMICALS IS - ANSWER REDUCED PRESSURE PRINCIPLE
ASSEMBLY
FOR CONTAINMENT PROTECTION IN A NON-HEALTH HAZARD SITUATION, THE
MINIMUM PROTECTION REQUIRED SHALL BE - ANSWER DOUBLE CHECK
BACKFLOW PREVENTION ASSEMBLY
WATER CONTINUOUSLY LEAKING FROM TEST COCK #2 DURING A TEST
PROCEDURE OF A PRESSURE VACUUM BREAKER ASSEMBLY IS PROBABLY CAUSED
BY A LEAKING - ANSWER INLET SHUT-OFF VALVE #1
WHAT IS THE PROBABLE CAUSE OF A RELIEF VALVE FAILING TO OPEN DURING A
FIELD TEST ON A REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTER? -
ANSWER MALFUNCTION OF THE RELIEF VALVE MECHANISM
