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.