BACKFLOW PREVENTION EXAM
QUESTIONS AND ANSWERS
DIFFERENTIAL PRESSURE RELIEF VALVE DISCHARGE READING - CORRECT
ANSWERS ✅✅ -A DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY TEST
AND MAINTENANCE REPORT SHALL INCLUDE ALL OF THE FOLLOWING
INFORMATION EXCEPT THE
TWELVE (12) - CORRECT ANSWERS ✅✅ -AN ATMOSPHERIC TYPE VACUUM
BREAKER SHALL NOT BE SUBJECTED TO WATER PRESSURE FOR PERIODS
THAN ______ HOURS.
33.9 - CORRECT ANSWERS ✅✅ -IT IS POSSIBLE FOR A PERFECT VACUUM AT
SEA LEVEL TO RAISE WATER IN A PIPE APPROXIMATELY _________ FEET.
IN AN ACCESSIBLE LOCATION ABOVE GROUND - CORRECT ANSWERS ✅✅ -
WHAT IS THE MOST DESIRABLE PLACE TO INSTALL A BACKFLOW PREVENTION
DEVICE AND/OR ASSEMBLY?
TURNING OFF SERVICE TO A MULTI-STORY BUILDING AND ALLOWING THE
WATER SUPPLY TO DRAIN - CORRECT ANSWERS ✅✅ -WHICH OF THE
FOLLOWING CONDITIONS COULD RESULT IN WATER CONTAMINATION
THROUGH A CROSS-CONNECTION?
CONTAMINATION - CORRECT ANSWERS ✅✅ -WHAT IS ANOTHER TERM THAT
DESCRIBES WATER QUALITY AS A HEALTH HAZARD RESULTING FROM
BACKFLOW?
DECREASES - CORRECT ANSWERS ✅✅ -THE VENTURI EFFECT STATES
THAT WHEN THE WATER VELOCITY WITHIN THE PIPE INCREASES, THE
PRESSURE:
BASED UPON THE QUALITY OF A NON POTABLE WATER SOURCE - CORRECT
ANSWERS ✅✅ -THE DEGREE OF HAZARD IS:
BACKPRESSURE OR BACKSIPHONAGE - CORRECT ANSWERS ✅✅ -
BACKFLOW MAY BE DESCRIBED AS EITHER:
TWELVE (12) - CORRECT ANSWERS ✅✅ -HOW MANY INCHES MUST A
PRESSURE TYPE VACUUM BREAKER ASSEMBLY BE INSTALLED ABOVE ALL
DOWNSTREAM PIPING?
, NON-HEALTH HAZARD - BACKPRESSURE AND BACKSIPHONAGE - CORRECT
ANSWERS ✅✅ -A DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY WILL
PROTECT THE POTABLE WATER SUPPLY FROM:
SIX (6) - CORRECT ANSWERS ✅✅ -HOW MANY INCHES MUST AN
ATMOSPHERIC VACUUM BREAKER BE INSTALLED ABOVE ALL DOWNSTREAM
PIPING AND HIGHEST OPENING?
BACKSIPHONAGE - HEALTH HAZARD OR NON-HEALTH HAZARD CONDITIONS -
CORRECT ANSWERS ✅✅ -AN ATMOSPHERIC VACUUM BREAKER IS
INSTALLED TO PROTECT AGAINST:
TWO APPROVED CHECK VALVES AND A DIFFERENTIAL PRESSURE RELIEF
VALVE - CORRECT ANSWERS ✅✅ -THE TERM "APPROVED REDUCED
PRESSURE PRINCIPLE ASSEMBLY", APPLIES TO AN ASSEMBLY WITH TWO
SHUT-OFF VALVES, FOUR TEST COCKS AND:
ANNUALLY - CORRECT ANSWERS ✅✅ -IT IS REQUIRED THAT THE TEST
GAUGE BE TESTED FOR ACCURACY AT LEAST:
THE ASPIRATOR EFFECT - CORRECT ANSWERS ✅✅ -UNDERSIZED WATER
PIPING CARRYING WATER AT HIGH VELOCITY CAN CAUSE BACKSIPHONAGE
DUE TO:
FLOOD LEVEL RIM - CORRECT ANSWERS ✅✅ -AN AIR GAP SEPARATION IS
MEASURED FROM THE OUTLET OF THE DISCHARGE PIPE, TO THE:
DOUBLE CHECK DETECTOR ASSEMBLY BACKFLOW PREVENTER - CORRECT
ANSWERS ✅✅ -THE MINIMUM TYPE OF CONTAINMENT PROTECTION FOR A
NON-HEALTH HAZARD, NON-CHEMICAL FIRE SPRINKLER SYSTEM IS A(N):
REDUCED PRESSURE PRINCIPLE ASSEMBLY (RPZ) - CORRECT ANSWERS
✅✅ -THE TYPE OF PROTECTION REQUIRED FOR A CLOSED LOOP HEATING
SYSTEM CONTAINING CHEMICALS IS:
DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY - CORRECT ANSWERS
✅✅ -FOR CONTAINMENT PROTECTION IN A NON-HEALTH HAZARD
SITUATION, THE MINIMUM PROTECTION REQUIRED SHALL BE:
INLET SHUT-OFF VALVE #1 - CORRECT ANSWERS ✅✅ -WATER
CONTINUOUSLY LEAKING FROM TEST COCK #2 DURING A TEST PROCEDURE
OF A PRESSURE VACUUM BREAKER ASSEMBLY IS PROBABLY CAUSED BY A
LEAKING:
PRESSURE VACUUM BREAKER ASSEMBLY - CORRECT ANSWERS ✅✅ -A
SPILL RESISTANT VACUUM BREAKER (SVB) IS A MODIFIED:
QUESTIONS AND ANSWERS
DIFFERENTIAL PRESSURE RELIEF VALVE DISCHARGE READING - CORRECT
ANSWERS ✅✅ -A DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY TEST
AND MAINTENANCE REPORT SHALL INCLUDE ALL OF THE FOLLOWING
INFORMATION EXCEPT THE
TWELVE (12) - CORRECT ANSWERS ✅✅ -AN ATMOSPHERIC TYPE VACUUM
BREAKER SHALL NOT BE SUBJECTED TO WATER PRESSURE FOR PERIODS
THAN ______ HOURS.
33.9 - CORRECT ANSWERS ✅✅ -IT IS POSSIBLE FOR A PERFECT VACUUM AT
SEA LEVEL TO RAISE WATER IN A PIPE APPROXIMATELY _________ FEET.
IN AN ACCESSIBLE LOCATION ABOVE GROUND - CORRECT ANSWERS ✅✅ -
WHAT IS THE MOST DESIRABLE PLACE TO INSTALL A BACKFLOW PREVENTION
DEVICE AND/OR ASSEMBLY?
TURNING OFF SERVICE TO A MULTI-STORY BUILDING AND ALLOWING THE
WATER SUPPLY TO DRAIN - CORRECT ANSWERS ✅✅ -WHICH OF THE
FOLLOWING CONDITIONS COULD RESULT IN WATER CONTAMINATION
THROUGH A CROSS-CONNECTION?
CONTAMINATION - CORRECT ANSWERS ✅✅ -WHAT IS ANOTHER TERM THAT
DESCRIBES WATER QUALITY AS A HEALTH HAZARD RESULTING FROM
BACKFLOW?
DECREASES - CORRECT ANSWERS ✅✅ -THE VENTURI EFFECT STATES
THAT WHEN THE WATER VELOCITY WITHIN THE PIPE INCREASES, THE
PRESSURE:
BASED UPON THE QUALITY OF A NON POTABLE WATER SOURCE - CORRECT
ANSWERS ✅✅ -THE DEGREE OF HAZARD IS:
BACKPRESSURE OR BACKSIPHONAGE - CORRECT ANSWERS ✅✅ -
BACKFLOW MAY BE DESCRIBED AS EITHER:
TWELVE (12) - CORRECT ANSWERS ✅✅ -HOW MANY INCHES MUST A
PRESSURE TYPE VACUUM BREAKER ASSEMBLY BE INSTALLED ABOVE ALL
DOWNSTREAM PIPING?
, NON-HEALTH HAZARD - BACKPRESSURE AND BACKSIPHONAGE - CORRECT
ANSWERS ✅✅ -A DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY WILL
PROTECT THE POTABLE WATER SUPPLY FROM:
SIX (6) - CORRECT ANSWERS ✅✅ -HOW MANY INCHES MUST AN
ATMOSPHERIC VACUUM BREAKER BE INSTALLED ABOVE ALL DOWNSTREAM
PIPING AND HIGHEST OPENING?
BACKSIPHONAGE - HEALTH HAZARD OR NON-HEALTH HAZARD CONDITIONS -
CORRECT ANSWERS ✅✅ -AN ATMOSPHERIC VACUUM BREAKER IS
INSTALLED TO PROTECT AGAINST:
TWO APPROVED CHECK VALVES AND A DIFFERENTIAL PRESSURE RELIEF
VALVE - CORRECT ANSWERS ✅✅ -THE TERM "APPROVED REDUCED
PRESSURE PRINCIPLE ASSEMBLY", APPLIES TO AN ASSEMBLY WITH TWO
SHUT-OFF VALVES, FOUR TEST COCKS AND:
ANNUALLY - CORRECT ANSWERS ✅✅ -IT IS REQUIRED THAT THE TEST
GAUGE BE TESTED FOR ACCURACY AT LEAST:
THE ASPIRATOR EFFECT - CORRECT ANSWERS ✅✅ -UNDERSIZED WATER
PIPING CARRYING WATER AT HIGH VELOCITY CAN CAUSE BACKSIPHONAGE
DUE TO:
FLOOD LEVEL RIM - CORRECT ANSWERS ✅✅ -AN AIR GAP SEPARATION IS
MEASURED FROM THE OUTLET OF THE DISCHARGE PIPE, TO THE:
DOUBLE CHECK DETECTOR ASSEMBLY BACKFLOW PREVENTER - CORRECT
ANSWERS ✅✅ -THE MINIMUM TYPE OF CONTAINMENT PROTECTION FOR A
NON-HEALTH HAZARD, NON-CHEMICAL FIRE SPRINKLER SYSTEM IS A(N):
REDUCED PRESSURE PRINCIPLE ASSEMBLY (RPZ) - CORRECT ANSWERS
✅✅ -THE TYPE OF PROTECTION REQUIRED FOR A CLOSED LOOP HEATING
SYSTEM CONTAINING CHEMICALS IS:
DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY - CORRECT ANSWERS
✅✅ -FOR CONTAINMENT PROTECTION IN A NON-HEALTH HAZARD
SITUATION, THE MINIMUM PROTECTION REQUIRED SHALL BE:
INLET SHUT-OFF VALVE #1 - CORRECT ANSWERS ✅✅ -WATER
CONTINUOUSLY LEAKING FROM TEST COCK #2 DURING A TEST PROCEDURE
OF A PRESSURE VACUUM BREAKER ASSEMBLY IS PROBABLY CAUSED BY A
LEAKING:
PRESSURE VACUUM BREAKER ASSEMBLY - CORRECT ANSWERS ✅✅ -A
SPILL RESISTANT VACUUM BREAKER (SVB) IS A MODIFIED:
