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Quality Control Procedures Flashcards

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

Read the first 7 Quality Control Procedures flashcards as text

  1. What is the primary reason for performing a pneumatic leak test instead of a hydrostatic test in certain situations?

    Answer: The system cannot support the weight of water

    Pneumatic tests are used when the system cannot structurally support the weight of water or when residual water would damage the process.

  2. When performing MT (magnetic particle testing) on a weld, what does the presence of a linear indication along the weld centerline suggest?

    Answer: Centerline cracking or hot cracking

    A linear MT indication along the weld centerline is characteristic of centerline cracking, often caused by high sulfur content or improper weld bead width-to-depth ratio.

  3. In QC documentation, what is a 'red-line' or 'mark-up' drawing used for?

    Answer: Recording field changes made during construction for as-built documentation

    Red-line drawings record deviations from the original design made during field construction and serve as the basis for final as-built drawings.

  4. Which of the following best describes the purpose of a piping system cleanliness flush before commissioning?

    Answer: To remove mill scale, weld slag, and debris that could damage valves and equipment

    Pre-commissioning flushing removes construction debris, mill scale, and weld slag to protect downstream equipment such as pumps, valves, and instrumentation.

  5. What is the correct procedure when a welder changes to a different diameter pipe that is outside their qualified thickness range?

    Answer: Re-qualify on a test coupon within the new range

    Welders must be qualified for the specific thickness range; work outside that range requires re-qualification with a test coupon representative of the new material.

  6. A liquid penetrant test (PT) shows a rounded indication 3/16 inch in diameter on a socket weld. What is the next step?

    Answer: Evaluate against the applicable code acceptance criteria before accepting or rejecting

    All PT indications must be evaluated against the applicable code (e.g., ASME B31.1) acceptance criteria before a disposition decision is made.

  7. What is the significance of 'P-number' classification in ASME welding quality control?

    Answer: It groups base metals with similar welding characteristics to simplify procedure qualification

    ASME P-numbers group base metals by metallurgical similarity so that one qualified WPS can cover multiple materials within the same group.