Top 150+ Solved Liquid Penetrant Testing Level 1 MCQ Questions Answer
Q. For adequate test results, the black light used in fluorescent penetrant examinationshould provide what minimum black light intensity at the test surface?
a. 100 foot candles per square centimetre
b. 1000 microwatts per square centimetre
c. 800 foot candles
d. 35 microwatts per square centimetre
Q. What minimum warm-up time is required for acceptable performance of a mercuryVapour arc black light?
a. None
b. 2 minutes
c. 5 minutes
d. 10 minutes
Q. Which of the following penetrants contains an emulsifying agent?
a. Solvent removable
b. Water washable
c. Post emulsifiable
d. Fluorescent
Q. Which of the following penetrants must be treated with an emulsifier prior to waterremoval?
a. Solvent removable
b. Water washable
c. Post emulsifiable
d. Fluorescent
Q. What is the function of an emulsifier?
a. To remove the excess penetrant
b. To develop indications with a post emulsifiable penetrant system
c. To assist penetration with a post emulsifiable penetrant system
d. To make a post emulsifiable penetrant water washable
Q. Methylene chloride, isopropyl, alcohol, naptha and mineral spirits are examples of:
a. Emulsifiers
b. Developers
c. Solvent removers
d. None of the above
Q. What type of solvent removers may be used with a solvent removable penetrant?
a. Any organic solvent
b. Only the cleaner recommended by the manufacturer of the penetrant
c. Any alcohol based solvents
d. Only chlorinated hydrocarbons
Q. Which of the following is a prerequisite for a penetrant test?
a. Developer must be applied in a thin, even coat
b. Any surface coatings or soils must be completely removed
c. All traces of penetrant materials should be removed after testing is complete
d. The test object must be non-magnetic
Q. Which of the following types of pre-cleaning processes may be used for liquidpenetrant 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
Q. What is the likely result of incomplete removal of all excess penetrant from the testpiece surface?
a. Formation of false indications
b. Formation of relevant indications
c. Exaggeration of the size of relevant indications
d. None of the above
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
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
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