BACKFLOW FROM CLASS EXAM
QUESTIONS AND ANSWERS
A pressure vacuum breaker backflow preventer is designed to protect the water supply
from pollution under which condition?
A: Backpressure
B: Backsiphonage
C: Water hammer
D: A and B - Correct Answers -B: Backsiphonage
An AVB must be installed ___.
A: in a pit
B: on the discharge side of a shut-off valve
C: 6" above grade
D: 12" above the highest outlet - Correct Answers -B: On the discharge side of a shut-
off valve
Which backflow preventer is designed to protect from sewage under both backpressure
and backsiphonage conditions?
A: RPZ
B: AG
C: AVB
D: PVB - Correct Answers -B: AG
The term "Air Gap" & "separation" means:
A: a hole in the supply piping
B: a gap in the airline to supply a tank
C: a physical break between the water supply line and a receiving vessel
D: a mechanical type backflow prevention assembly - Correct Answers -C: A physical
break between the water supply line and a receiving vessel
True or False?
A Pressure Vacuum Breaker type backflow preventer is designed to protect from
pollution under backpressure conditions? - Correct Answers -False
, Water closets and urinals shall be protected by a ____.
A: DC
B: PVB
C: AVB
D: SVB - Correct Answers -C: AVB
The overall responsibility for prevention of cross-connections under Title 17 is vested
with the ____.
A: water purveyor
B: building inspector
C: health department
D: the journeyman - Correct Answers -C: Health Department
Who has the primary responsibility for preventing water from unapproved sources
entering the public water supply?
A: The Water Purveyors
B: The Health Agencies
C: The Plumbing Inspectors
D: The Water Consumers - Correct Answers -A: The Water Purveyors
If a serious cross-connection is discovered in a building the plumber should:
A: write it down for future reference.
B: notify the administrative authority.
C: notify the owner.
D: all the above. - Correct Answers -D: All of the above
True or False?
A Pressure Vacuum Breaker type backflow preventer is designed to protect from
contamination under backsiphonage conditions? - Correct Answers -True
A perfect vacuum at sea level will raise water in a pipe about:
A: 28'
B: 34'
C: 36'
D: 38' - Correct Answers -B: 34'
When installing or hooking up a piece of equipment to a potable water line you should
____.
QUESTIONS AND ANSWERS
A pressure vacuum breaker backflow preventer is designed to protect the water supply
from pollution under which condition?
A: Backpressure
B: Backsiphonage
C: Water hammer
D: A and B - Correct Answers -B: Backsiphonage
An AVB must be installed ___.
A: in a pit
B: on the discharge side of a shut-off valve
C: 6" above grade
D: 12" above the highest outlet - Correct Answers -B: On the discharge side of a shut-
off valve
Which backflow preventer is designed to protect from sewage under both backpressure
and backsiphonage conditions?
A: RPZ
B: AG
C: AVB
D: PVB - Correct Answers -B: AG
The term "Air Gap" & "separation" means:
A: a hole in the supply piping
B: a gap in the airline to supply a tank
C: a physical break between the water supply line and a receiving vessel
D: a mechanical type backflow prevention assembly - Correct Answers -C: A physical
break between the water supply line and a receiving vessel
True or False?
A Pressure Vacuum Breaker type backflow preventer is designed to protect from
pollution under backpressure conditions? - Correct Answers -False
, Water closets and urinals shall be protected by a ____.
A: DC
B: PVB
C: AVB
D: SVB - Correct Answers -C: AVB
The overall responsibility for prevention of cross-connections under Title 17 is vested
with the ____.
A: water purveyor
B: building inspector
C: health department
D: the journeyman - Correct Answers -C: Health Department
Who has the primary responsibility for preventing water from unapproved sources
entering the public water supply?
A: The Water Purveyors
B: The Health Agencies
C: The Plumbing Inspectors
D: The Water Consumers - Correct Answers -A: The Water Purveyors
If a serious cross-connection is discovered in a building the plumber should:
A: write it down for future reference.
B: notify the administrative authority.
C: notify the owner.
D: all the above. - Correct Answers -D: All of the above
True or False?
A Pressure Vacuum Breaker type backflow preventer is designed to protect from
contamination under backsiphonage conditions? - Correct Answers -True
A perfect vacuum at sea level will raise water in a pipe about:
A: 28'
B: 34'
C: 36'
D: 38' - Correct Answers -B: 34'
When installing or hooking up a piece of equipment to a potable water line you should
____.
