Top 80+ Solved Liquid Penetrant Testing Level 2 MCQ Questions Answer
Q. Possible degradation of penetrant materials performance is often checked by:
a. Performing penetrant testing of comparator blocks using samples of new and used penetrant materials
b. Water tolerance test
c. Using a penetrant test penetrameter
d. Judgment of a qualified inspector during production testing
Q. The most common biological effect of penetrant materials on personnel is:
a. Burns to the retina of the eye from over exposure to ultraviolet light
b. Skin irritation caused by removal of natural oils from the skin
c. Acute chlorine poisoning
d. No effect
Q. Hydrophilic emulsifiers may be applied by:
a. Dipping
b. Immersion
c. Spraying
d. All of the above
Q. The term ‘drag out losses’ refers to:
a. Loss of penetrant materials that are carried from one processing station to another on the test piece
b. Penetrant which is removed from discontinuities during the water washable process
c. Penetrant which is removed from discontinuities because of overemulsification prior to water removal
d. Both b and c
Q. The diffusion mechanism is used in the operation of:
a. Solvent removable penetrant
b. Lipophilic emulsifiers
c. Hydrophilic emulsifiers
d. Both b and c
Q. The concentration of a hydrophilic emulsifier may be measured by:
a. Specific gravity
b. Fluorescent brightness
c. An optical refraction meter
d. A comparator block
Q. When applied by immersion, an optimum concentration for a hydrophilic emulsifier is about:
a. 0.5–2%
b. 80–100%
c. 2.5–20%
d. 50–80%
Q. Hydrophilic emulsifier contact time depends on which of the following?
a. Surface finish of test piece
b. Emulsifier concentration
c. Method of application
d. All of the above
Q. How is the correct emulsifier contact time determined?
a. Manufacturer's recommendations
b. One half penetrant dwell time
c. Experiment
d. Same as penetrant dwell time
Q. Which of the following is used in connection with hydrophilic emulsifier applied byimmersion?
a. Brushing
b. Agitation
c. Drain-dwell
d. All of the above
Q. Which of the following is a disadvantage of a hydrophilic emulsifier?
a. Greater penetrant tolerance than lipophilic emulsifiers
b. Economical
c. Low drag-out losses compared to lipophilic emulsifiers
d. none
Q. During excess penetrant removal, a water spray pre-rinse might be used with:
a. A lipophilic emulsifier
b. A hydrophilic emulsifier
c. A hydrophobic emulsifier
d. None of the above
Q. Re-cycling of penetrant and rinse water is facilitated with which of the followingemulsifier types?
a. Hydrophobic
b. Hydrophilic
c. Lipophilic
d. Hygroscopic
Q. Which type of emulsifier is intended for use without dilution?
a. Hydrophobic
b. Hydrophilic
c. Lipophilic
d. Hygroscopic
Q. Halogen content of penetrant materials is limited because of the possibility of stresscorrosion cracking in which of the following materials?
a. High tensile steel
b. Austenitic stainless steel
c. Titanium alloys
d. All of the above