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MMET 402 - Exam 1: PT Questions & Answers
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MMET 402 - Exam 1: PT Questions & Answers
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MMET 402 - Exam 1: PT Questions &Answers
Before conducting a liquid penetrant test, it is important to ensure that the surface of the part is
free of:
a. oil or grease
b. acids or chromates
c. traces of water
d. all of the above Correct Ans-d
When performing a penetrant test using a postemulsification penetrant, which of the following is
the most critical with
respect to proper timing?
a. dwell time
b. developing time
c. emulsification time
d. drying time Correct Ans-c
Which of the following is the most likely result of an excessive emulsification time when
penetrant testing with
postemulsification penetrants?
a. a large number of nonrelevant indications could appear on the part
b. shallow discontinuity indications could be lost
, c. excess penetrant could remain after the wash operation
d. the emulsifier could harden, preventing the developer from blotting the penetrant in
iscontinuities Correct Ans-b
Which of the following is the primary limitation of liquid penetrant testing?
a. penetrant testing cannot be used on ferromagnetic material
b. penetrant testing cannot locate shallow surface discontinuities
c. penetrant testing cannot be used on nonmetallic surfaces
d. penetrant testing cannot locate subsurface discontinuities Correct Ans-d
Liquid penetrant testing is a nondestructive test that can be used for:
a. locating and evaluating all types of discontinuities in a test specimen
b. locating and determining the length, width, and depth of discontinuities in a test specimen
c. determining the tensile strength of a test specimen
d. locating discontinuities open to the surface Correct Ans-d
Penetrants may be classified or subdivided by the method used to remove excess penetrant.
Which of the following is
a proper classification in accordance with this statement?
a. nonsolvent removable
b. vapor degreased
c. brush removable
d. water washable Correct Ans-d
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