Practice Test Geeks(API 510) API 510 Inspector Certification Practice Test
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Pressure Testing Flashcards

7 cards from real API 510 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Pressure Testing flashcards as text

  1. According to API 510, what is the minimum hold time for a pneumatic pressure test on a pressure vessel?

    Answer: 10 minutes

    API 510 requires a minimum hold time of 10 minutes for pneumatic pressure tests before conducting the inspection.

  2. When performing a hydrostatic test, the test pressure at the top of the vessel must account for which of the following?

    Answer: Liquid head pressure

    The liquid head pressure must be considered when setting test pressure, as the pressure at the top differs from the pressure at the bottom due to fluid column height.

  3. Which condition would require the owner/user to obtain approval before performing a pressure test after a repair?

    Answer: Major repairs involving welding on pressure boundary

    Major repairs involving welding on the pressure boundary require an authorized inspection agency to approve the pressure test per API 510.

  4. A vessel has an MAWP of 500 psi. The standard hydrostatic test pressure per ASME Code is approximately:

    Answer: 650 psi

    ASME requires hydrostatic test pressure to be 1.3 times the MAWP, so 500 × 1.3 = 650 psi.

  5. What is the primary reason pneumatic testing is considered more hazardous than hydrostatic testing?

    Answer: Compressed gas stores significantly more energy than liquid at the same pressure

    Compressed gases store far more energy than incompressible liquids at the same pressure, resulting in a much more violent potential failure.

  6. During a pressure test, a small leak is detected at a flange. What is the appropriate action per API 510?

    Answer: Depressurize the vessel before attempting repairs

    The vessel must be fully depressurized before any repairs are attempted to ensure personnel safety.

  7. Which of the following exemptions allows a pressure test to be omitted after a repair per API 510?

    Answer: When the inspector determines testing is impractical and alternative NDE methods are used

    API 510 allows the inspector to waive a pressure test when it is impractical, provided suitable NDE and examination methods are substituted.