Virginia Backflow Prevention Device Worker
Exam Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary purpose of a backflow prevention device?
A. To increase water pressure
B. To prevent contamination of the potable water supply
C. To regulate water temperature
D. To reduce water usage
B. To prevent contamination of the potable water supply
Rationale: The main function of backflow prevention devices is to
protect drinking water systems from contamination due to backflow
from non-potable sources.
2. Which type of backflow is caused by a negative pressure in the
water supply system?
A. Backpressure
B. Backsiphonage
, C. Cross-connection
D. Hydrostatic flow
B. Backsiphonage
Rationale: Backsiphonage occurs when a vacuum or negative pressure
draws water back into the potable water system, potentially introducing
contaminants.
3. Which type of backflow occurs when the downstream pressure
exceeds the supply pressure?
A. Backsiphonage
B. Backpressure
C. Cross-connection
D. Pressure reversal
B. Backpressure
Rationale: Backpressure backflow happens when a higher pressure in
the downstream system forces water back into the potable water
supply.
4. A cross-connection is best described as:
A. A point where two different water systems meet and may allow
contamination
B. A point where water pipes are joined for efficiency
, C. A type of backflow prevention device
D. A water supply booster station
A. A point where two different water systems meet and may allow
contamination
Rationale: Cross-connections are potential hazards where potable water
may come in contact with non-potable water, creating a contamination
risk.
5. Which device is commonly used to prevent backpressure backflow
in high-hazard applications?
A. Reduced Pressure Zone (RPZ) assembly
B. Atmospheric vacuum breaker
C. Pressure vacuum breaker
D. Double check valve assembly
A. Reduced Pressure Zone (RPZ) assembly
Rationale: RPZ assemblies provide high protection against both
backpressure and backsiphonage and are recommended for high-hazard
conditions.
6. Which device is typically used in irrigation systems to prevent
backflow?
A. RPZ assembly
B. Double check valve assembly
, C. Atmospheric vacuum breaker
D. All of the above
C. Atmospheric vacuum breaker
Rationale: Atmospheric vacuum breakers are commonly installed on
irrigation systems because they are effective against backsiphonage and
are relatively simple devices.
7. How often must backflow prevention devices in Virginia be
tested?
A. Monthly
B. Annually
C. Every 5 years
D. Only when installed
B. Annually
Rationale: Virginia regulations require annual testing of backflow
prevention devices to ensure proper operation and protect public health.
8. Who is authorized to test backflow prevention devices in Virginia?
A. Any licensed plumber
B. A certified Backflow Prevention Device Tester
C. Local water utility personnel only
D. Homeowners
Exam Questions With Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A |
Instant Download Pdf
1. What is the primary purpose of a backflow prevention device?
A. To increase water pressure
B. To prevent contamination of the potable water supply
C. To regulate water temperature
D. To reduce water usage
B. To prevent contamination of the potable water supply
Rationale: The main function of backflow prevention devices is to
protect drinking water systems from contamination due to backflow
from non-potable sources.
2. Which type of backflow is caused by a negative pressure in the
water supply system?
A. Backpressure
B. Backsiphonage
, C. Cross-connection
D. Hydrostatic flow
B. Backsiphonage
Rationale: Backsiphonage occurs when a vacuum or negative pressure
draws water back into the potable water system, potentially introducing
contaminants.
3. Which type of backflow occurs when the downstream pressure
exceeds the supply pressure?
A. Backsiphonage
B. Backpressure
C. Cross-connection
D. Pressure reversal
B. Backpressure
Rationale: Backpressure backflow happens when a higher pressure in
the downstream system forces water back into the potable water
supply.
4. A cross-connection is best described as:
A. A point where two different water systems meet and may allow
contamination
B. A point where water pipes are joined for efficiency
, C. A type of backflow prevention device
D. A water supply booster station
A. A point where two different water systems meet and may allow
contamination
Rationale: Cross-connections are potential hazards where potable water
may come in contact with non-potable water, creating a contamination
risk.
5. Which device is commonly used to prevent backpressure backflow
in high-hazard applications?
A. Reduced Pressure Zone (RPZ) assembly
B. Atmospheric vacuum breaker
C. Pressure vacuum breaker
D. Double check valve assembly
A. Reduced Pressure Zone (RPZ) assembly
Rationale: RPZ assemblies provide high protection against both
backpressure and backsiphonage and are recommended for high-hazard
conditions.
6. Which device is typically used in irrigation systems to prevent
backflow?
A. RPZ assembly
B. Double check valve assembly
, C. Atmospheric vacuum breaker
D. All of the above
C. Atmospheric vacuum breaker
Rationale: Atmospheric vacuum breakers are commonly installed on
irrigation systems because they are effective against backsiphonage and
are relatively simple devices.
7. How often must backflow prevention devices in Virginia be
tested?
A. Monthly
B. Annually
C. Every 5 years
D. Only when installed
B. Annually
Rationale: Virginia regulations require annual testing of backflow
prevention devices to ensure proper operation and protect public health.
8. Who is authorized to test backflow prevention devices in Virginia?
A. Any licensed plumber
B. A certified Backflow Prevention Device Tester
C. Local water utility personnel only
D. Homeowners
