BACKFLOW TEST QUESTIONS AND
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
It is possible for a perfect vacuum at sea level to raise water in a pipe
approximately _________ feet.
Answer: 34 feet.
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 use
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
ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
It is possible for a perfect vacuum at sea level to raise water in a pipe
approximately _________ feet.
Answer: 34 feet.
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 use
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
