This set of Casting, Forming and Welding Multiple Choice Questions & Answers (MCQs) focuses on “Dye Penetrant Test”.
1. Which of the following is not a type of developer?
a) Dry powder
b) Water soluble developer
c) Oil soluble developer
d) Water suspendible developer
View Answer
Explanation: Dye penetrant test is one of the methods of non-destructive testing of the components. The application of developer is one of the steps of inspection of dye penetrant test. Oil soluble developer is not a type of developer.
2. For how long is a penetrant allowed to soak in cracks?
a) 5 to 15 minutes
b) 10 to 30 minutes
c) 15 to 35 minutes
d) 20 to 40 minutes
View Answer
Explanation: None.
3. Penetrants of which colour are not used?
a) Red
b) Blue
c) Green
d) Yellow
View Answer
Explanation: The application of penetrant is one of the steps of inspection of dye penetrant test. It is an important feature that one must take care of, that the penetrant used, must not be of red colour, as defects are identified using red colour.
4. Which of the following is not an excess penetrant remover?
a) Solvent removable
b) Water washable
c) Lipophilic pre-emulsifiable
d) Lipophilic post-emulsifiable
View Answer
Explanation: A penetrant remover material highly depends on the type of material by which the penetrant is made. Among the following, a lipophilic pre-emulsifiable is not a type of excess penetrant remover.
5. Which of the following is not a method of pre-cleaning?
a) Solvent
b) Acid blasting
c) Vapour degreasing
d) Media blasting
View Answer
Explanation: The application of pre-cleaning is one of the steps of inspection of dye penetrant test. Solvent, alkaline, vapour degreasing and media blasting are a few types of pre-cleaning process, but not acid blasting.
6. Which of the following is not a type of penetrant application?
a) Dipping
b) Spraying
c) Brushing
d) Pouring
View Answer
Explanation: The application of penetrant is one of the steps of inspection of the dye penetrant test. Among these, dipping, spraying or brushing are different ways by which penetrant can be applied, but not pouring.
7. Which of the following defect is not detected by dye penetrant test?
a) Non-metallic inclusions
b) Leaks
c) Cracks
d) Forging defects
View Answer
Explanation: Dye penetrant test is one of the methods of non-destructive testing of the components. Leaks, cracks and forging defects are some defects which can be identified by using dye penetrant test. But, for detecting non-metallic inclusions, one will have to do a magnaflux test.
8. What is the amount of time taken for blotting?
a) 5 minutes
b) 10 minutes
c) 15 minutes
d) 20 minutes
View Answer
Explanation: The process of inspection is one of the steps of the important of dye penetrant test. The operation of inspection begins after the article is allowed to blot for around ten minutes.
9. Only fluorescent dye is used in dye penetrant test.
a) True
b) False
View Answer
Explanation: For the inspection using non-destructive testing, when dye penetrant test is used, there are two types of lights that are used. This type of light which has to be used depends upon the type of die used, fluorescent or non-fluorescent.
10. Only ultraviolet light is used in dye penetrant test.
a) True
b) False
View Answer
Explanation: None.
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