Nondestructive Testing.

37 Questions | Total Attempts: 1995

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Nondestructive Testing. - Quiz

Questions and Answers
  • 1. 
    Magnetic particle inspection is used primarily to detect
    • A. 

      Distortion

    • B. 

      Deep subsurface flaws

    • C. 

      Flaws on or near the surface

  • 2. 
    Liquid penetrant inspection method may be used on which of the following?
    • A. 

      Porous plastics

    • B. 

      Ferrous metals

    • C. 

      Nonferrous metals

    • D. 

      Smooth primer-sealed wood

    • E. 

      Nonporous plastics

  • 3. 
    What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects?
    • A. 

      Residual

    • B. 

      Inductance

    • C. 

      Continuous

  • 4. 
    The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has 
    • A. 

      High permeability and low retentivity

    • B. 

      Low permeability and high retentivity

    • C. 

      High permeability and high retentivity

  • 5. 
    Which statement relating to the residual magnetizing inspection method is true?
    • A. 

      Subsurface discontinuities are made readily apparent.

    • B. 

      It is used in practically all circular and longitudinal magnetizing procedures.

    • C. 

      It may be used only with steels which have been heat treated for stressed applications.

  • 6. 
    What two types of indicating mediums are available for magnetic particle inspection?
    • A. 

      Wet and dry process materials.

    • B. 

      High retentivity and low permeability material.

    • C. 

      Iron and ferric oxides.

  • 7. 
    Which of the following materials may be inspected using the magnetic particle inspection method?
    • A. 

      Magnesium alloys

    • B. 

      Aluminum alloys

    • C. 

      Iron alloys

    • D. 

      Copper alloys

    • E. 

      Zinc alloys

  • 8. 
    One way apart may be demagnetized after magnetic particle inspection is by
    • A. 

      Subjecting the part to high voltage, low amperage AC

    • B. 

      Slowly moving the part out of an AC magnetic field of sufficient strength.

    • C. 

      Slowly moving the part into an AC magnetic field of sufficient strength.

  • 9. 
    Which type crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization?
    • A. 

      45 degrees

    • B. 

      Longitudinal

    • C. 

      Transverse

  • 10. 
    Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forgings and castings?
    • A. 

      Dye penetrant inspection

    • B. 

      Magnetic particle inspection

    • C. 

      Metallic ring (coin tap) inspection

    • D. 

      Eddy current inspection

    • E. 

      Ultrasonic inspection

    • F. 

      Visual inspection

  • 11. 
    To detect a minute crack using due penetrant inspection usually requires
    • A. 

      That the developer be applied to a flat surface.

    • B. 

      A longer-than-normal penetrating time.

    • C. 

      The surface to be highly polished.

  • 12. 
    When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used to 
    • A. 

      Reveal all possible defects.

    • B. 

      Evenly magnetize the entire part.

    • C. 

      Ensure uniform current flow.

  • 13. 
    In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes
    • A. 

      A large disruption in the magnetic field.

    • B. 

      A minimal disruption in the magnetic field.

    • C. 

      No disruption in the magnetic field.

  • 14. 
    If due penetrant inspection indications are not sharp and clear, the most probable cause is that the part
    • A. 

      Was not correctly degaussed before the developer was applied.

    • B. 

      Has no appreciable damage.

    • C. 

      Was not thoroughly washed before the developer was applied.

  • 15. 
    1) an aircraft part my be demagnetized by subjecting it to a magnetizing force from alternating current that is gradually reduced in strength. 2) an aircraft part may be demagnetized by subjecting it to a magnetizing force from direct current that is alternately reversed in direction and gradually reduced in strength. regarding the above statements.
    • A. 

      Both no. 1 and no. 2 are true

    • B. 

      Only no. 1 is true

    • C. 

      Only no. 2 is true

  • 16. 
    The pattern for an inclusion is a magnetic particle buildup forming
    • A. 

      A fernlike pattern.

    • B. 

      A single line.

    • C. 

      Parallel lines.

  • 17. 
    A part which is being prepared for due penetrant inspection should be cleaned with 
    • A. 

      A volatile petroleum-base solvent.

    • B. 

      The penetrant developer.

    • C. 

      Water-base solvents only.

  • 18. 
    Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition
    • A. 

      The dicontinuity pattern is straight.

    • B. 

      The discontinuity is found in a non stressed area of the part.

    • C. 

      The discontinuity is found in a highly stressed area of the part.

  • 19. 
    In performing a dye penetrant inspection, the developer
    • A. 

      Seeps into surface crack to indicate the presence of a defect.

    • B. 

      Acts as a blotter to produce a visible indication.

    • C. 

      Thoroughly cleans the surface prior to inspection.

  • 20. 
    What defects will be detected by magnetizing a part using continuous longitudinal magnetizationwith a cable?
    • A. 

      Defects perpendicular to the long axis of the part.

    • B. 

      Defects parallel to the long axis of the part.

    • C. 

      Defects parallel to the concentric circles of magnetic force within the part.

  • 21. 
    Irculae magnetization of a part can be used to detect which deflects?
    • A. 

      Defects parallel to the long axis of the part.

    • B. 

      Defects perpendicular to the long axis of the part.

    • C. 

      Defects perpendicular to the concentric circles of magnetic force within the part.

  • 22. 
    1) in nondestructive testing, a discontinuity may be defined as an interruption in the nirm physical structure or configuration of a part.  2) a discontinuity may or may not affect the usefulness of part.  Regarding the above statements,
    • A. 

      Only no. 1 is true.

    • B. 

      Only no. 2 is true.

    • C. 

      Both no. 1 and no. 2 are true.

  • 23. 
    Which of the following is a main determinant of the swell time to use when conducting a due or flourescent penetrant inspection?
    • A. 

      The size and shape of the discontinuities being looked for.

    • B. 

      The size and shape of the part being inspected.

    • C. 

      The type and/or density of the part material.

  • 24. 
    Holes and a few projecting globules are found in a weld. What action should be taken?
    • A. 

      Thoroughly clean the area and rewelded over the first bead to fill gaps and obtain uniform strength.

    • B. 

      Remove all the old weld and reweld the joint.

    • C. 

      Grind the rough surface smooth and reweld the joint.

  • 25. 
    Which condition indicates a part has cooled too quickly after being welded?
    • A. 

      Cracking adjacent to the weld.

    • B. 

      Discoloration of the base metal.

    • C. 

      Gas pockets, porosity, and slag inclusions.

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