Materials And Processes #1

60 Questions | Total Attempts: 662

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Materials And Processes #1 - Quiz


Questions and Answers
  • 1. 
    Aside from increasing the integrity and safety of manufactured pieces, nondestructive testing cuts costs by:
    • A. 

      Increasing production rates

    • B. 

      Reducing personnel

    • C. 

      Eliminating poor stock prior to processing

    • D. 

      All of the above

  • 2. 
    In order to evaluate a defect an inspector must have:
    • A. 

      knowledge of the test

    • B. 

      A knowledge of the material tested

    • C. 

      A knowledge of the applicable codes

    • D. 

      All of the above

  • 3. 
    It may be said that specialists in non-destructive testing must:
    • A. 

      Be aware of the capabilities of materials to sustain deformation without forming defects.

    • B. 

      Be knowledgeable about the materials they inspect and the defects which can form in them.

    • C. 

      Have an exhaustive knowledge of metallurgy.

    • D. 

      All the above answers are correct.

  • 4. 
    Which of the following statements is correct?
    • A. 

      The heat-affected zone of a weld is basically a homogeneous structure.

    • B. 

      In some areas of the weld heat-affected zone, grain size can be smaller than in the unaffected base metal.

    • C. 

      The temperature in the heat-affected zone can sometimes exceed the temperature in the fusion zone.

    • D. 

      Transverse cracks do not occur in the heat-affected zone.

  • 5. 
    Metal forming such as rolling results in:
    • A. 

      Plastic flow of the metal.

    • B. 

      Elongation of existing defects perpendicular to the rolling direction.

    • C. 

      Directional properties which are always beneficial for secondary forming operations.

    • D. 

      The flattening out of defects which makes them more easily detectable by most NDT methods.

  • 6. 
    What can cause stress risers?
    • A. 

      Punch marks

    • B. 

      Corrosion grooves

    • C. 

      Corrosion pits

    • D. 

      All the above answers

  • 7. 
    When a metal (or alloy) cools from a liquid to a solid state, the lack of molten metal to feed the shrinkage will lead to:
    • A. 

      Pipes, voids and cavities.

    • B. 

      Sponge like appearance and hot tears.

    • C. 

      None of the above.

    • D. 

      both a) and b).

  • 8. 
    Which of the following is not a cause of undercutting?
    • A. 

      Excessive amperage

    • B. 

      Excessive travel speed

    • C. 

      Excessive electrode diameter

    • D. 

      Excessive restraint during welding

  • 9. 
    In general, where can you find heat treatment cracks?
    • A. 

      At the centre of a weld

    • B. 

      In areas of sudden change in thickness

    • C. 

      On a cast plate

    • D. 

      All the above answers

  • 10. 
    All indications found by NDT methods are:
    • A. 

      Rejectable

    • B. 

      Direct

    • C. 

      Indirect

    • D. 

      Dimensionally correct

  • 11. 
    In darkened surroundings, the eye dark adapts. This is called:
    • A. 

      Myopia

    • B. 

      Scotopic vision

    • C. 

      Hyper myopia

    • D. 

      Photopic vision

  • 12. 
    In a situation where several methods of testing are necessary for complete inspection of a part, the preferred sequence would be:
    • A. 

      Use penetrant inspection before ultrasonic inspection.

    • B. 

      To use magnetic particle inspection before penetrant inspection.

    • C. 

      to use ultrasonic inspection before penetrant inspection

    • D. 

      Any of the above depending on the existing situation.

  • 13. 
    The inspection of a number of parts from a lot to determine the quality of the lot is called:
    • A. 

      Lot testing

    • B. 

      Periodic checks

    • C. 

      Spot examination

    • D. 

      Statistical inspection

  • 14. 
    Which of the following may be considered an advantage of powder metallurgy as a manufacturing method?
    • A. 

      Production of parts of closer tolerances

    • B. 

      Mass production of hard-to-shape parts

    • C. 

      Produce parts with a high strength to weight ratio

    • D. 

      All of the above

  • 15. 
    Which of the following heat treatments usually follows a hardening treatment in order to make the steel more ductile?
    • A. 

      Annealing

    • B. 

      Tempering

    • C. 

      Spheroidizing

    • D. 

      Normalizing

  • 16. 
    Which of the following statements is correct?
    • A. 

      Alkaline solutions are never used to clean aluminum alloys.

    • B. 

      Acid solutions are never used to clean aluminum alloys.

    • C. 

      Acid solutions are usually used to clean aluminum alloys.

    • D. 

      Alkaline solutions are usually used to clean aluminum alloys.

  • 17. 
    Suitable combinations of two different materials each with specific properties may result in a composite that:
    • A. 

      Is better in terms of resistance to heat than either of the two components alone.

    • B. 

      Is stronger in tension per unit weight than either of the two components alone.

    • C. 

      Is stiffer per unit weight than either of the two components alone.

    • D. 

      Any of the above.

  • 18. 
    Thermal conductivity of a metal is an important factor to consider in making quality weldments because:
    • A. 

      Some metals, such as aluminum, have a low conductivity which results in weld defects due to localized heat build up.

    • B. 

      Some metals, such as stainless steel, have a high conductivity which results in lack of fusion defects as the heat is quickly removed from the weld zone.

    • C. 

      In some metals, such as aluminum, very high temperature gradients are produced, causing stresses during cooling.

    • D. 

      None of the above.

  • 19. 
    Fracture is a type of material failure. Of the following, which is another type of material failure?
    • A. 

      Fracture mechanics

    • B. 

      Low frequency dynamic loading

    • C. 

      Permanent deformation

    • D. 

      Elongation within the elastic range

  • 20. 
    To remove iron from the ore in a blast furnace, the following materials are added to the furnace to generate the desired chemical reactions:
    • A. 

      coke, ore and oxygen.

    • B. 

      Bauxite, ore and air.

    • C. 

      Coke, ore, limestone and air.

    • D. 

      Oke, ore, limestone and bauxite.

  • 21. 
    The reason for putting ingots in a soaking pit is:
    • A. 

      to control the direction of crystallization.

    • B. 

      To homogenize the structure and composition of the ingots.

    • C. 

      To permit slow cooling of the ingots.

    • D. 

      To bring them to the temperature required for rolling.

  • 22. 
    An advantage of using green sand molds over dry sand molds is:
    • A. 

      Green sand molds are stronger then dry sand molds and thus are less susceptible to damage in handling.

    • B. 

      Surface finish of large castings are better when using green sand molds

    • C. 

      Over-all dimensional accuracy of the mold is better with green sand.

    • D. 

      There is less danger of hot tearing of castings when using green sand molds.

  • 23. 
    Shielded metal-arc welding is a process of joining metals which is:
    • A. 

      Fully automated.

    • B. 

      Semi-automated.

    • C. 

      Carried out manually.

    • D. 

      All of the above.

  • 24. 
    In the resistance spot welding of low-carbon steel, the heat generated is:
    • A. 

      Concentrated between the positive electrode and the work.

    • B. 

      Concentrated at the interface of the two plates to be welded.

    • C. 

      Concentrated between the negative electrode and the work.

    • D. 

      Evenly distributed in the work between the electrodes.

  • 25. 
    Which of the following is not a brazing process?
    • A. 

      Furnace brazing

    • B. 

      Induction brazing

    • C. 

      Infrared brazing

    • D. 

      Electron beam brazing

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