TCEQ Backflow Prevention Assembly Tester Exam | questions &
answers & rationale | 2025/2026 | Latest Update| Instant download!!
1. What is the primary purpose of a backflow prevention assembly?
A. To increase water pressure in a system
B. To prevent the reverse flow of contaminated water into the potable water supply ✔
C. To filter debris from the water supply
D. To regulate temperature of the water
Correct Answer: B
Rationale: Backflow prevention assemblies protect public health by preventing contamination of drinking
water.
2. Which of the following is considered a potential cause of backflow?
A. High water pressure
B. Pressure drop in the supply system (back-siphonage) ✔
C. Properly functioning valves
D. Regular maintenance
Correct Answer: B
Rationale: Backflow can occur due to back-siphonage or backpressure, which can introduce contaminants.
3. What is the minimum frequency for testing most backflow prevention assemblies according to
TCEQ?
A. Every 6 months
B. Annually ✔
C. Every 3 years
D. Only after installation
Correct Answer: B
Rationale: Annual testing ensures proper operation and compliance with regulations.
,4. Which device is designed specifically to prevent backflow from a high hazard system?
A. Pressure vacuum breaker (PVB)
B. Double check valve assembly (DCVA)
C. Reduced pressure principle assembly (RP) ✔
D. Atmospheric vacuum breaker (AVB)
Correct Answer: C
Rationale: RP assemblies are designed for high-hazard applications to provide maximum protection.
5. What is the proper way to isolate a backflow assembly for testing?
A. Close all supply valves, then open test cocks ✔
B. Remove the assembly entirely
C. Close only the upstream valve
D. Test without isolation
Correct Answer: A
Rationale: Isolating the assembly prevents disruption of the water system and ensures accurate test results.
6. Which test is used to check the differential pressure relief valve in a reduced pressure principle
assembly?
A. Forward flow test
B. Relief valve test ✔
C. Shutoff valve test
D. Pressure vacuum breaker test
Correct Answer: B
Rationale: The relief valve test ensures the RP assembly can discharge to prevent backflow.
7. A double check valve assembly has how many check valves?
,A. One
B. Two ✔
C. Three
D. Four
Correct Answer: B
Rationale: By design, a double check assembly contains two independently acting check valves.
8. Which tool is commonly required for testing backflow assemblies?
A. Multimeter
B. Test gauge kit ✔
C. Pipe wrench only
D. Screwdriver only
Correct Answer: B
Rationale: Test gauges measure differential pressure to verify proper operation.
9. What does a pressure vacuum breaker (PVB) primarily protect against?
A. High pressure
B. Back-siphonage ✔
C. Temperature fluctuations
D. Debris
Correct Answer: B
Rationale: PVBs are designed to prevent back-siphonage, not backpressure.
10. Which of the following is a sign that a check valve in a backflow assembly may be failing?
A. No change in differential pressure
B. Reverse flow detected during testing ✔
C. Normal operation
D. Pressure remains constant
, Correct Answer: B
Rationale: Reverse flow indicates the check valve is not holding properly.
11. The TCEQ requires that backflow testers must:
A. Be certified ✔
B. Only have on-the-job experience
C. Work unsupervised without testing
D. Replace assemblies without certification
Correct Answer: A
Rationale: Certification ensures testers are qualified to conduct accurate and safe tests.
12. Which assembly is commonly used for irrigation systems?
A. Reduced pressure principle assembly (RP)
B. Pressure vacuum breaker (PVB) ✔
C. Double check valve assembly (DCVA)
D. Atmospheric vacuum breaker (AVB)
Correct Answer: B
Rationale: PVBs are suitable for irrigation systems with moderate hazard risk.
13. What must be done if a backflow assembly fails a test?
A. Document failure, tag assembly, and repair immediately ✔
B. Ignore and retest later
C. Remove the assembly without reporting
D. Only notify the property owner
Correct Answer: A
Rationale: Proper documentation and repair ensure compliance and protection of potable water.
14. Which of the following best describes “backpressure”?
answers & rationale | 2025/2026 | Latest Update| Instant download!!
1. What is the primary purpose of a backflow prevention assembly?
A. To increase water pressure in a system
B. To prevent the reverse flow of contaminated water into the potable water supply ✔
C. To filter debris from the water supply
D. To regulate temperature of the water
Correct Answer: B
Rationale: Backflow prevention assemblies protect public health by preventing contamination of drinking
water.
2. Which of the following is considered a potential cause of backflow?
A. High water pressure
B. Pressure drop in the supply system (back-siphonage) ✔
C. Properly functioning valves
D. Regular maintenance
Correct Answer: B
Rationale: Backflow can occur due to back-siphonage or backpressure, which can introduce contaminants.
3. What is the minimum frequency for testing most backflow prevention assemblies according to
TCEQ?
A. Every 6 months
B. Annually ✔
C. Every 3 years
D. Only after installation
Correct Answer: B
Rationale: Annual testing ensures proper operation and compliance with regulations.
,4. Which device is designed specifically to prevent backflow from a high hazard system?
A. Pressure vacuum breaker (PVB)
B. Double check valve assembly (DCVA)
C. Reduced pressure principle assembly (RP) ✔
D. Atmospheric vacuum breaker (AVB)
Correct Answer: C
Rationale: RP assemblies are designed for high-hazard applications to provide maximum protection.
5. What is the proper way to isolate a backflow assembly for testing?
A. Close all supply valves, then open test cocks ✔
B. Remove the assembly entirely
C. Close only the upstream valve
D. Test without isolation
Correct Answer: A
Rationale: Isolating the assembly prevents disruption of the water system and ensures accurate test results.
6. Which test is used to check the differential pressure relief valve in a reduced pressure principle
assembly?
A. Forward flow test
B. Relief valve test ✔
C. Shutoff valve test
D. Pressure vacuum breaker test
Correct Answer: B
Rationale: The relief valve test ensures the RP assembly can discharge to prevent backflow.
7. A double check valve assembly has how many check valves?
,A. One
B. Two ✔
C. Three
D. Four
Correct Answer: B
Rationale: By design, a double check assembly contains two independently acting check valves.
8. Which tool is commonly required for testing backflow assemblies?
A. Multimeter
B. Test gauge kit ✔
C. Pipe wrench only
D. Screwdriver only
Correct Answer: B
Rationale: Test gauges measure differential pressure to verify proper operation.
9. What does a pressure vacuum breaker (PVB) primarily protect against?
A. High pressure
B. Back-siphonage ✔
C. Temperature fluctuations
D. Debris
Correct Answer: B
Rationale: PVBs are designed to prevent back-siphonage, not backpressure.
10. Which of the following is a sign that a check valve in a backflow assembly may be failing?
A. No change in differential pressure
B. Reverse flow detected during testing ✔
C. Normal operation
D. Pressure remains constant
, Correct Answer: B
Rationale: Reverse flow indicates the check valve is not holding properly.
11. The TCEQ requires that backflow testers must:
A. Be certified ✔
B. Only have on-the-job experience
C. Work unsupervised without testing
D. Replace assemblies without certification
Correct Answer: A
Rationale: Certification ensures testers are qualified to conduct accurate and safe tests.
12. Which assembly is commonly used for irrigation systems?
A. Reduced pressure principle assembly (RP)
B. Pressure vacuum breaker (PVB) ✔
C. Double check valve assembly (DCVA)
D. Atmospheric vacuum breaker (AVB)
Correct Answer: B
Rationale: PVBs are suitable for irrigation systems with moderate hazard risk.
13. What must be done if a backflow assembly fails a test?
A. Document failure, tag assembly, and repair immediately ✔
B. Ignore and retest later
C. Remove the assembly without reporting
D. Only notify the property owner
Correct Answer: A
Rationale: Proper documentation and repair ensure compliance and protection of potable water.
14. Which of the following best describes “backpressure”?
