UON Visual and Surface Testing CMA2

Q1. Which of the following common discontinuities, in a weld or casting, is difficult to detect by the magnetic particle method?

  • Porosity
  • A crack
  • Lamination
  • All of the other options

Q2. Which of the following options is TRUE? Inherent discontinuities are:

  • Formed when molten metal solidifies.
  • Discontinuities that exist inside the material below the surface.
  • Just a property of the alloy of metal.
  • None of the other options are TRUE.

Q3. Which of the following is considered as the most sensitive type of developers?

  • Water Soluble
  • Dry Powder
  • Aqueous
  • Non-aqueous

Q4. Sometimes there is absolutely no pattern or distribution of magnetic particles on the part. This is probably because:

  • The amperage setting is too high.
  • The amperage setting is too low.
  • The part is made of steel with high retentivity.
  • The particle bath strength is too high.

Q5. Which of the following factors should be considered when selecting the most adequate process of testing by liquid penetrants?

  • All of the other options should be considered.
  • Condition of the test part’s surface.
  • Configuration of the test part.
  • Number of test parts to be inspected.

Q6. Which of the following statements is TRUE in liquid penetrant testing?

  • All of the other statements are TRUE.
  • Surface condition does not affect the inspection sensitivity.
  • Post cleaning is not required.
  • Only surface breaking flaws can be detected.

Q7. A penetrant of high viscosity would:

  • Need a long time of penetration.
  • Not penetrate at all.
  • Need intermediate time of penetration.
  • Need a short time of penetration.

Q8. When performing a liquid penetrant test, the surface of the test part:

  • Should be slightly oiled.
  • Should be free of grease, oil and other contaminants.
  • Can be inspected directly as long as it looks clean.
  • All of the other options are TRUE.

Q9. Which of the following should be removed in order to obtain a good penetrant test?

  • Paints.
  • Oxides.
  • Varnishes
  • All of the other options.

Q10. The time of penetration is less dependent on:

  • The type of discontinuity to be detected.
  • The developer to be used.
  • The temperature of the test part.
  • The material of the test part to be tested.

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