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Backflow Prevention Assembly Flashcards

7 cards from real ABC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Backflow Prevention Assembly flashcards as text

  1. A tester records a #2 check valve differential of 2 psi on a DCVA. The minimum acceptable differential for most jurisdictions is 1 psi. The correct action is:

    Answer: Pass the assembly — 2 psi exceeds the 1 psi minimum

    If the measured differential (2 psi) meets or exceeds the jurisdiction's minimum (1 psi), the check valve passes; the tester records the actual reading on the test report.

  2. Which of the following applications would most likely require an RP assembly rather than a DCVA?

    Answer: Medical facility where chemical treatment is added to the water system

    A medical facility with chemical additives in its water system is a high-hazard cross-connection requiring the higher level of protection provided by an RP assembly.

  3. What is the function of test cock #4 on a reduced pressure principle assembly?

    Answer: To measure or bleed pressure downstream of check #2

    Test cock #4 is located downstream of check valve #2 on an RP assembly and is used to measure downstream pressure or bleed the downstream side during testing procedures.

  4. A large commercial RP assembly is installed in a vault below grade. What additional concern must the tester address before entering?

    Answer: Confined space entry procedures and atmospheric testing must be followed

    Below-grade vaults are classified as confined spaces; OSHA requires atmospheric testing for oxygen deficiency, combustible gases, and toxic vapors before entry.

  5. After repairing a check valve on an RP assembly, the tester MUST:

    Answer: Perform a full field test to verify the repaired assembly meets acceptance criteria

    Any time an assembly is repaired or a component replaced, a full field test must be performed to confirm the assembly is functioning correctly before returning it to service.

  6. Which of the following is NOT a listed backflow prevention assembly recognized for field testing by the USC FCCCHR?

    Answer: Single check valve (SCV)

    A single check valve alone is not a testable backflow prevention assembly; it lacks the redundancy and test cocks required for field testing and is not listed as an approved assembly type.

  7. If a state plumbing code requires protection at a high-hazard cross-connection but the property owner installs only a DCVA, the authority having jurisdiction (AHJ) should:

    Answer: Require the owner to upgrade to an RP assembly or air gap to meet code

    The AHJ is responsible for enforcing code; a DCVA does not meet high-hazard requirements, so the AHJ must require the installation of an appropriate RP assembly or air gap.