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Pt practice questions

29 questions from the nondestructive testing (level ii) practice test.

Pt practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

In the standard penetrant classification, which removal method is designated Method C?

  1. Water washable
  2. Post-emulsifiable, lipophilic
  3. Solvent removable
  4. Post-emulsifiable, hydrophilic
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C. Solvent removable

The methods are A water washable, B post-emulsifiable lipophilic, C solvent removable and D post-emulsifiable hydrophilic. Method C is the portable spray-can process most often used for field weld inspection.

Reference: ASTM E1417 and SAE AMS 2644, penetrant classification

What makes a Method A penetrant removable with plain water?

  1. It has a very low viscosity
  2. An emulsifier is blended into it
  3. It is applied over a wet developer
  4. A separate remover is sprayed on first
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B. An emulsifier is blended into it

Water-washable penetrant has the emulsifying agent built in, so a water spray lifts it directly. That convenience is also its weakness: it is the easiest penetrant to over-wash out of wide or shallow discontinuities.

Reference: ASTM E165, water-washable penetrants

Penetrant systems are graded by sensitivity level. Which level is the most sensitive?

  1. Level 1
  2. Level 4
  3. Level 1/2
  4. Level 2
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B. Level 4

Fluorescent penetrant sensitivity runs from Level 1/2 (very low) through Level 4 (ultra-high). Higher levels reveal finer discontinuities but also give more background on rough surfaces, so the highest level is not always the best choice.

Reference: SAE AMS 2644 and ASTM E1417, sensitivity levels

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