BAT Inspection & Quality Control 2 — Questions and Answers
Question 1: When performing a field test on a double check valve assembly (DCVA), what is the minimum acceptable differential pressure reading across check valve #1?
- 1.0 psid
- 2.0 psid (Correct answer)
- 3.0 psid
- 0.5 psid
Correct answer: 2.0 psid
DCVA check valve #1 must maintain a minimum differential pressure of 2.0 psid to pass a field test.
Question 2: A reduced pressure principle assembly (RPBA) is tested and the relief valve opens during the #1 check valve test. What does this indicate?
- The relief valve is fouled and needs cleaning
- Check valve #1 has failed and is not holding the required pressure differential (Correct answer)
- The supply pressure is too high for the assembly
- The #2 check valve is leaking
Correct answer: Check valve #1 has failed and is not holding the required pressure differential
If the relief valve opens during the #1 check test, check valve #1 is not holding a sufficient differential above the relief valve opening point.
Question 3: Which of the following conditions would cause a tester to FAIL an RPBA during inspection?
- Relief valve drips intermittently under normal supply pressure (Correct answer)
- Inlet shutoff valve is a ball valve instead of a gate valve
- Assembly is installed with 12 inches of clearance above the floor
- Outlet shutoff valve is slightly stiff to operate
Correct answer: Relief valve drips intermittently under normal supply pressure
An RPBA relief valve that drips under normal operating pressure indicates the valve is not seating properly and the assembly should fail.
Question 4: During inspection of a pressure vacuum breaker (PVB), the air inlet valve disc is visually found to be cracked. What is the correct action?
- Continue testing; a cracked disc may still seal adequately
- Record the defect and allow the assembly to remain in service pending repair
- Fail the assembly and require repair before returning to service (Correct answer)
- Replace only the disc and retest immediately without reporting
Correct answer: Fail the assembly and require repair before returning to service
A cracked air inlet disc is a mechanical defect that requires the assembly to be failed and repaired before it can be returned to service.
Question 5: A backflow prevention assembly is installed in a pit. What is a critical inspection concern unique to pit installations?
- Pit installations are always exempt from annual testing requirements
- The assembly must be a reduced pressure type regardless of hazard level
- The pit must be free of standing water and provide adequate access for testing (Correct answer)
- Pit-installed assemblies require monthly instead of annual testing
Correct answer: The pit must be free of standing water and provide adequate access for testing
Pit installations must be free of standing water, properly drained, and provide safe access so a tester can safely perform field tests.
Question 6: When inspecting a double check detector assembly (DCDA) on a fire sprinkler line, what additional component must the tester verify is functioning correctly?
- The bypass meter check valve (Correct answer)
- The fire department connection (FDC)
- The dry pipe valve
- The alarm check valve trim
Correct answer: The bypass meter check valve
A DCDA includes a metered bypass line with its own check valve, and the tester must verify the bypass check seats properly to detect unauthorized water use.
Question 7: Which documentation must a certified BAT provide to the water purveyor after completing a field test?
- Only a verbal report if the assembly passes
- A completed test report form including assembly type, location, test results, and tester certification number (Correct answer)
- A copy of the assembly manufacturer's installation guide
- A written estimate for any repairs identified
Correct answer: A completed test report form including assembly type, location, test results, and tester certification number
The tester must submit a completed test report to the water purveyor that includes all required fields: assembly identification, location, test data, pass/fail result, and the tester's certification number.
BAT Inspection & Quality Control 2
When performing a field test on a double check valve assembly (DCVA), what is the minimum acceptable differential pressure reading across check valve #1?