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Penetrant Testing Flashcards

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

Read the first 7 Penetrant Testing flashcards as text

  1. What NDT Level certification is required to interpret and evaluate PT indications per ASNT SNT-TC-1A?

    Answer: Level II or Level III

    Per SNT-TC-1A, Level II and Level III personnel are qualified to interpret and evaluate PT indications and accept or reject parts.

  2. What is the effect of excessive water pressure during the rinse step in water-washable penetrant testing?

    Answer: It can wash penetrant out of shallow or wide discontinuities, causing missed indications

    Excessive water pressure during rinsing can force penetrant out of open discontinuities, particularly shallow ones, leading to missed indications.

  3. Which discontinuity geometry retains penetrant MOST effectively, producing the strongest indication?

    Answer: Tight, narrow, deep crack

    Tight, narrow, deep cracks maximize capillary retention of penetrant and produce strong, well-defined indications after developer application.

  4. When using solvent-removable penetrant (Method C), how should excess penetrant be removed from the surface?

    Answer: Wipe with a dry cloth, then solvent-dampened cloth

    Solvent removal requires first wiping with a dry cloth to remove bulk penetrant, then using a lightly solvent-dampened cloth to clean remaining surface penetrant without flooding.

  5. A linear indication in PT is defined as one whose length is how many times greater than its width?

    Answer: 3:1

    Per ASME Section V, an indication is considered linear when its length is at least three times its width.

  6. What is the main reason penetrant testing cannot be used on porous materials like powder metallurgy parts without special precautions?

    Answer: Porosity throughout the material causes background bleedout that masks real indications

    Bulk porosity in porous materials causes penetrant to bleed out everywhere, creating a uniform background that obscures relevant indications from actual defects.

  7. Which post-cleaning method is MOST effective for removing penetrant materials from a part after inspection is complete?

    Answer: Solvent soak followed by vapor degreasing

    Solvent soaking followed by vapor degreasing thoroughly dissolves and removes penetrant, developer, and emulsifier residues from the part surface and discontinuities.