BACKFLOW PREVENTION QUESTIONS
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Differential pressure relief valve discharge reading
Answer: A double check backflow prevention assembly test and maintenance
report shall include all of the following information except the differential pressure
relief valve discharge reading.
Twelve (12)
Answer: An atmospheric type vacuum breaker shall not be subjected to water
pressure for periods longer than 12 hours.
33.9
Answer: It is possible for a perfect vacuum at sea level to raise water in a pipe
approximately 33.9 feet.
In an accessible location above ground
Answer: What is the most desirable place to install a backflow prevention device
and/or assembly? In an accessible location above ground.
Turning off service to a multi-story building and allowing the water supply to
drain
Answer: Which of the following conditions could result in water contamination
through a cross-connection? Turning off service to a multi-story building and
allowing the water supply to drain.
CONTAMINATION -ANSWER✔✔WHAT IS ANOTHER TERM THAT
DESCRIBES WATER QUALITY AS A HEALTH HAZARD RESULTING
FROM BACKFLOW?
, DECREASES -ANSWER✔✔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 -
ANSWER✔✔THE DEGREE OF HAZARD IS:
BACKPRESSURE OR BACKSIPHONAGE -ANSWER✔✔BACKFLOW MAY
BE DESCRIBED AS EITHER:
TWELVE (12) -ANSWER✔✔HOW MANY INCHES MUST A PRESSURE
TYPE VACUUM BREAKER ASSEMBLY BE INSTALLED ABOVE ALL
DOWNSTREAM PIPING?
NON-HEALTH HAZARD - BACKPRESSURE AND BACKSIPHONAGE -
ANSWER✔✔A DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY
WILL PROTECT THE POTABLE WATER SUPPLY FROM:
SIX (6) -ANSWER✔✔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 -ANSWER✔✔AN ATMOSPHERIC VACUUM BREAKER IS
INSTALLED TO PROTECT AGAINST:
TWO APPROVED CHECK VALVES AND A DIFFERENTIAL PRESSURE
RELIEF VALVE -ANSWER✔✔THE TERM "APPROVED REDUCED
AND ANSWERS WITH COMPLETE
SOLUTIONS 100% CORRECT RATED A+
Differential pressure relief valve discharge reading
Answer: A double check backflow prevention assembly test and maintenance
report shall include all of the following information except the differential pressure
relief valve discharge reading.
Twelve (12)
Answer: An atmospheric type vacuum breaker shall not be subjected to water
pressure for periods longer than 12 hours.
33.9
Answer: It is possible for a perfect vacuum at sea level to raise water in a pipe
approximately 33.9 feet.
In an accessible location above ground
Answer: What is the most desirable place to install a backflow prevention device
and/or assembly? In an accessible location above ground.
Turning off service to a multi-story building and allowing the water supply to
drain
Answer: Which of the following conditions could result in water contamination
through a cross-connection? Turning off service to a multi-story building and
allowing the water supply to drain.
CONTAMINATION -ANSWER✔✔WHAT IS ANOTHER TERM THAT
DESCRIBES WATER QUALITY AS A HEALTH HAZARD RESULTING
FROM BACKFLOW?
, DECREASES -ANSWER✔✔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 -
ANSWER✔✔THE DEGREE OF HAZARD IS:
BACKPRESSURE OR BACKSIPHONAGE -ANSWER✔✔BACKFLOW MAY
BE DESCRIBED AS EITHER:
TWELVE (12) -ANSWER✔✔HOW MANY INCHES MUST A PRESSURE
TYPE VACUUM BREAKER ASSEMBLY BE INSTALLED ABOVE ALL
DOWNSTREAM PIPING?
NON-HEALTH HAZARD - BACKPRESSURE AND BACKSIPHONAGE -
ANSWER✔✔A DOUBLE CHECK BACKFLOW PREVENTION ASSEMBLY
WILL PROTECT THE POTABLE WATER SUPPLY FROM:
SIX (6) -ANSWER✔✔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 -ANSWER✔✔AN ATMOSPHERIC VACUUM BREAKER IS
INSTALLED TO PROTECT AGAINST:
TWO APPROVED CHECK VALVES AND A DIFFERENTIAL PRESSURE
RELIEF VALVE -ANSWER✔✔THE TERM "APPROVED REDUCED
