Backflow Prevention Practice Exam Latest Update 2024-2025 100 Questions and 100% Verified Correct Answers Guaranteed A+ A backflow preventer creates a closed plumbing system that requires the installation of a(n) _____?
- Expansion tank
- Globe valve
- Pressure reducing valve
- Temperature and pressure relief valve
E. Utility box key - CORRECT ANSWER: Expansion tank
A barometric loop must be installed 35 ft (10.7 m) above the highest ____?
- Boiler
- Fixture outlet
- Gate valve
- Service connection
E. Water meter - CORRECT ANSWER: Fixture outlet
A check valve field test reported value of 0.8 psid (5.5 kPa) suggests _____?
- A passing check valve
- A broken or failed spring
- Debris in the check seat
- Disc softening or decay
E. Low water pressure - CORRECT ANSWER: Disc softening or decay
A common backflow preventer on a double-wall heat exchanger with leak detection is ____?
- An air-gap separation
- An atmospheric vacuum breaker
- A double check valve assembly
- A reduced pressure principle assembly
E. Nothing - CORRECT ANSWER: Nothing
A cross-connection may be a permanent piping arrangement or a(n) ____?
- Backflow preventer
- Church symbol
- OSHA hazardous area designation
- Railroad and highway intersection sign
E. Temporary hose bibb connection - CORRECT ANSWER: Temporary hose bibb
connection
A deck-mounted atmospheric vacuum breaker's critical installation level is above the outlet usage by ___?
- 1 in. (2.5 cm) 1 / 3
- 3 in. (7.6 cm)
- 6 in. (15 cm)
- 12 in. (30 cm)
E. 18 in. (46 cm) - CORRECT ANSWER: 1 in. (2.5 cm)
A differential pressure gauge reading of 0.2 psid is represented on water column sight tube by _____?
- 1/16 in. (0.16 cm)
- 1/2 in. (1.3 cm)
- 2 in. (5.1 cm)
- 3.5 in. (8.9 cm)
E. 5.5 in. (14 cm) - CORRECT ANSWER: 5.5 in. (14 cm)
A direct cross-connection suggests the piping system may be subjected to ____?
- Backpressure or backsiphonage
- Backsiphonage only
- Periodic inspection
- Sustained pressure
E. Toxic materials - CORRECT ANSWER: Backpressure or backsiphonage
A double check valve assembly installed in a vertical flow down orientation is only allowed ______?
- In a basement or vault
- If the assembly was tested and approved as such
- If the check weight does not compress the spring
- On fire-suppression systems
E. On water supply service connections - CORRECT ANSWER: If the assembly was
tested and approved as such
A double check valve assembly is installed 12 in. (30.5 cm) above the floor for _____?
- Electrical code compliance
- Floor draining
- Maintenance
- Mechanical code compliance
E. Rodent control - CORRECT ANSWER: Maintenance
A field test report for a double check valve assembly will include the manufacturer's name, model, size, and _____?
- Body material
- Date of manufacture
- Serial number
- Working pressure (maximum)
E. Working temperature (maximum) - CORRECT ANSWER: Serial number
A fire sprinkler system's backflow protection for a black-iron pipe system is typically
____? 2 / 3
- An air-gap separation
- A double check valve assembly
- A reduced pressure principle assembly
- A reduced pressure detector assembly
E. No protection required - CORRECT ANSWER: A double check valve assembly
A hose connection vacuum breaker's maintenance includes _____?
- Check disc replacement
- Diaphragm replacement
- Draining for winterization
- Replacement every 2 years
E. Water flushing - CORRECT ANSWER: Draining for winterization
A hose-bibb connection is required to have a permanently installed ____?
- Atmospheric vacuum breaker
- Backflow preventer
- Pressure vacuum breaker
- Shut-off valve
E. Spill-resistant vacuum breaker - CORRECT ANSWER: Atmospheric vacuum
breaker
A low-hazard use only backflow preventer is a(n) _____?
- Air-gap separation
- Atmospheric vacuum breaker
- Double check valve assembly
- Pressure vacuum breaker assembly
E. Reduced pressure principle assembly - CORRECT ANSWER: Double check valve
assembly
A pipe restriction's flow velocity increase may allow ____?
- Aspiration
- Backpressure
- Low turbulence
- Pressure head
E. Pressure surges - CORRECT ANSWER: Aspiration
A pressure vacuum breaker may have ____ on the assembly's discharge piping.
- Auxiliary water supply looped irrigation
- A boiler
- A booster pump
- Elevated piping
E. Irrigation sprinkler heads - CORRECT ANSWER: Irrigation sprinkler heads
A properly installed barometric loop will prevent _____?
- Backpressure
- Backsiphonage
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