Backflow Prevention Study Guide
(Charleston Water Systems) Questions and
Answers 100% Verified | Updated 2024-2025
Name the two types of backflow. - ANSWER Backpressure and Back
siphonage
All of the following may be considered acceptable for containment of a building
with the exception of a(n):
a) Air Gap
b) Double Check Valve Assembly
c) Residential Dual Check
d) Reduced Pressure Backflow Assembly
e) Pressure Vacuum Breaker Assembly - ANSWER e) Pressure Vacuum
Breaker Assembly
A Reduced Pressure Backflow Assembly (RP) protects against:
a) High hazard, Backpressure
b) High hazard, Backsiphonage
c) Low hazard, Backpressure & Backsiphonage
d) All of the above - ANSWER d) All of the above
How many test cocks are on a Reduced Pressure Backflow Assembly? -
ANSWER 4
How many test cocks are on a Double Check Valve Assembly? - ANSWER 4
, How many test cocks are on a Pressure Vacuum Breaker Assembly? -
ANSWER 2
How many test cocks are on an Atmospheric Vacuum Breaker? - ANSWER 0
True/False: Test Gauges should be properly stored to ensure they are not
damaged when not in use. - ANSWER True
A Backflow Preventer for Beverage Dispensing Equipment protects against carbon
dioxide from entering the potable water supply from which type of backflow?
a) Backpressure
b) Backsiphonage
c) Both A & B
d) None of the above - ANSWER c) Both A & B
A Residential Dual Check Backflow Preventer has:
a) Two Independently Acting Checks
b) Two Independently Acting Checks and an Atmospheric Port
c) Two Independently Acting Checks with a relief valve
d) None of the Above - ANSWER a) Two Independently Acting Checks
What is the best form or method backflow prevention?
a) A Double Check Valve Assembly
b) A Reduced Pressure Backflow Assembly
(Charleston Water Systems) Questions and
Answers 100% Verified | Updated 2024-2025
Name the two types of backflow. - ANSWER Backpressure and Back
siphonage
All of the following may be considered acceptable for containment of a building
with the exception of a(n):
a) Air Gap
b) Double Check Valve Assembly
c) Residential Dual Check
d) Reduced Pressure Backflow Assembly
e) Pressure Vacuum Breaker Assembly - ANSWER e) Pressure Vacuum
Breaker Assembly
A Reduced Pressure Backflow Assembly (RP) protects against:
a) High hazard, Backpressure
b) High hazard, Backsiphonage
c) Low hazard, Backpressure & Backsiphonage
d) All of the above - ANSWER d) All of the above
How many test cocks are on a Reduced Pressure Backflow Assembly? -
ANSWER 4
How many test cocks are on a Double Check Valve Assembly? - ANSWER 4
, How many test cocks are on a Pressure Vacuum Breaker Assembly? -
ANSWER 2
How many test cocks are on an Atmospheric Vacuum Breaker? - ANSWER 0
True/False: Test Gauges should be properly stored to ensure they are not
damaged when not in use. - ANSWER True
A Backflow Preventer for Beverage Dispensing Equipment protects against carbon
dioxide from entering the potable water supply from which type of backflow?
a) Backpressure
b) Backsiphonage
c) Both A & B
d) None of the above - ANSWER c) Both A & B
A Residential Dual Check Backflow Preventer has:
a) Two Independently Acting Checks
b) Two Independently Acting Checks and an Atmospheric Port
c) Two Independently Acting Checks with a relief valve
d) None of the Above - ANSWER a) Two Independently Acting Checks
What is the best form or method backflow prevention?
a) A Double Check Valve Assembly
b) A Reduced Pressure Backflow Assembly
