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Pipe Testing and Inspection Flashcards

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

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  1. Which NDE method is best suited for detecting surface and near-surface defects in ferromagnetic pipe materials?

    Answer: Magnetic particle testing (MT)

    Magnetic particle testing induces a magnetic field in ferromagnetic material; disruptions caused by surface or near-surface flaws cause iron particles to cluster and reveal the defect.

  2. What does the abbreviation PMI stand for in the context of pipe inspection?

    Answer: Positive Material Identification

    Positive Material Identification (PMI) verifies through chemical analysis that the correct alloy material was actually installed in the piping system.

  3. Which NDE method applies a colored or fluorescent dye to a surface, allows it to seep into defects, then draws it out with a developer for examination?

    Answer: Liquid penetrant testing (PT)

    Liquid penetrant testing uses capillary action to draw dye into surface-breaking defects; the developer then pulls the trapped dye back out, making the defect visible.

  4. What must be done with pressure relief valves in a piping system before performing a hydrostatic pressure test?

    Answer: Remove or isolate them from the test circuit

    Relief valves must be removed or isolated because their set pressure is typically at or near the design pressure, and they would open before the required test pressure is reached.

  5. What is the primary purpose of visual testing (VT) in piping inspection?

    Answer: To identify surface defects, misalignment, and improper installation

    Visual testing is the most fundamental NDE method and is used to identify visible surface defects, improper weld profiles, misalignment, and installation non-conformances.

  6. Which document is required to officially record the results of a piping pressure test, including hold times and inspector sign-off?

    Answer: Pressure test record or test report

    A pressure test record documents the date, test medium, pressure, hold time, temperature, results, and inspector's signature as required by ASME B31.3 and other piping codes.

  7. According to ASME B31.3, what is the maximum allowable temperature of the test water used for hydrostatic testing?

    Answer: 120°F (49°C)

    ASME B31.3 limits hydrostatic test water to a maximum of 120°F (49°C) to prevent potential vaporization and ensure accurate pressure readings.