Top 80+ Solved Liquid Penetrant Testing Level 2 MCQ Questions Answer
Q. An effect of a thick developer coating might be:
a. To obscure discontinuity indications
b. To enhance discontinuity indications
c. To increase penetrant test sensitivity by providing more capillary paths
d. None of the above
Q. Why is it important to view the test piece shortly after developer application andperiodically through the development time?
a. To make sure the developer dries evenly
b. To guard against pooling of developer in low areas
c. To avoid missing small flaw indications adjacent to areas of high bleed-out
d. To avoid missing transient indications against an otherwise clean background
Q. Which of the following is an advantage of a dry developer?
a. Ease of handling
b. Non-corrosive
c. No hazardous vapours
d. All of the above
Q. Why is the need for a dry surface prior to developer application more of a disadvantage with a dry developer than with a non-aqueous wet developer?
a. Because the dry developer only forms a thin film on the surface of the test piece
b. Because the solvent in a non-aqueous wet developer penetrates deeper into discontinuities to contact entrapped penetrant and draw it back out
c. Because the warm test piece causes evaporation of the solvent in the nonaqueous developer
d. All of the above
Q. The preferred method of application of aqueous wet developer is:
a. Dipping
b. Spraying
c. Brushing
d. All of the above
Q. It is easier to control developer coating thickness with a soluble developer than a watersuspendable one because:
a. Less developer can be dissolved that suspended in water
b. It dries more rapidly on the test piece
c. Evaporation deposits a thin, even coating on the test piece
d. All of the above
Q. Which of the following is not an advantage of an aqueous wet developer?
a. It may be applied to a dry surface
b. It has no hazardous vapours
c. There is visible evidence of developer coverage
d. During drying, only water evaporates, not costly solvents
Q. A disadvantage of water soluble developers is:
a. Agitation of the developer is not required
b. A uniform developer film is obtained
c. The dried developer is difficult to remove during post cleaning
d. None of the above
Q. Fluorescent penetrant indications are more visible than colour contrast penetrantindications because:
a. They reflect more light
b. They emit rather than reflect light
c. They contain a higher concentration of dye particles
d. Yellow and green contrast more than red and white
Q. The tendency of a liquid to be drawn into small discontinuities is called:
a. Viscosity
b. Barometric
c. Capillary action
d. Surface tension
Q. A liquid which reacts with a penetrant to render it water washable is called:
a. Developer
b. Emulsifier
c. Aqueous scrubber
d. Non-aqueous cleaner
Q. A water tolerance test would be performed on:
a. Solvent removable penetrants
b. Water washable and post emulsifiable penetrant
c. Solvent removable penetrants and hydrophilic emulsifiers
d. Water washable penetrants and lipophilic emulsifiers
Q. A problem which could be caused by a penetrant with abnormally high water contentis:
a. Hydrogen assisted cracking
b. Rusting of steel parts
c. Water contamination
d. Blurring of indications
Q. Deterioration of penetrant material performance may be caused by which of thefollowing?
a. Water contamination
b. Heat
c. Cleaning solvents
d. All of the above
Q. When adding water to a penetrant, the water tolerance limit is indicated when:
a. Opacity reaches 2% of International optical transmission standard
b. The penetrant material and dye separate into their constituent parts
c. Permanent cloudiness occurs
d. None of the above