Non Destructive Testing and Evaluation MCQs | Page - 1

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Mr. Dubey • 52.26K Points
Coach

Q. Which of the following types of pre-cleaning processes may be used for liquid penetrant testing?

(A) Wire brushing only
(B) Detergent and water only
(C) Vapour degreasing only
(D) Any process that leaves the part clean and dry, does not harm the part and is
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M

Mr. Dubey • 52.26K Points
Coach

Q. What is the likely result of incomplete removal of all excess penetrant from the test piece surface?

(A) Formation of false indications
(B) Formation of relevant indications
(C) Exaggeration of the size of relevant indications
(D) None of the above
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M

Mr. Dubey • 52.26K Points
Coach

Q. What is the preferred pre-cleaning process for removal of oil and grease :

(A) Steam cleaning with a added acid
(B) Vapour degreasing
(C) Steam cleaning
(D) Ultrasonic cleaning
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M

Mr. Dubey • 52.26K Points
Coach

Q. Which pre-cleaning method may be used with either a solvent or a detergent solution?

(A) Ultrasonic cleaning
(B) Steam cleaning
(C) Detergent wash
(D) Vapour degreasing
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M

Mr. Dubey • 52.26K Points
Coach

Q. What is the danger associated with using a wire brush during pre-cleaning?

(A) Bristles from the wire brush may cause false indications
(B) Contaminants from the wire brush may cause delayed hydrogen cracking of high carbon steels
(C) The wire brush may not adequately remove organic soils
(D) The wire brush may close or smear metal over
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M

Mr. Dubey • 52.26K Points
Coach

Q. What is the preferred method of removing paint prior to performing a penetrant testing?

(A) Sand blast
(B) Chemical removers
(C) Power wire brush
(D) Shot blast
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M

Mr. Dubey • 52.26K Points
Coach

Q. What additional surface preparation or cleaning must be performed on a machined or ground aluminium casting prior to penetrant testing?

(A) Vapour degreasing
(B) Etching
(C) Detergent wash
(D) Nothing
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M

Mr. Dubey • 52.26K Points
Coach

Q. Acceptable methods of penetrant application are:

(A) Spraying
(B) Dipping
(C) Brushing
(D) All of the above
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M

Mr. Dubey • 52.26K Points
Coach

Q. The time period during which penetrant remains on the surface of the test piece is called:

(A) Dwell time
(B) Soaking time
(C) Fixing time
(D) Development time
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M

Mr. Dubey • 52.26K Points
Coach

Q. Excess penetrant removal is a two step process with which of the following penetrant methods?

(A) Water washable
(B) Post emulsifiable
(C) Solvent removable
(D) Liquid oxygen applications
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