NDT NDE ASNT Questions and answers for PT, LPI level II (5).

31. Which of the following is not a good practice when penetrant testing?
A. Applying emulsifier by dipping the part in emulsifier
B. Appling developer by spraying the part with developer
C. Removal of water-washable penetrant with a water spray
D. Applying emulsifier with a brush (answer)
32. Dry developer should be applied :
A. So that a heavy coat of developer covers all surfaces
B. So that a light dusting covers all surfaces to be inspected (answer)
C. With a dry paint brush
D. By dipping
33. Which of the following is not a form in which penetrant developer is commonly available?
A. Dry developer
B. Non Aqueous developer
C. Wet developer
D. High viscosity developer (answer)
34. Which of the following discontinuities could be classified as a service induced discontinuity?
A. Fatigue crack (answer)
B. Porosity
C. Machine tear
D. Lap
35. Which of the following physical properties, more than any other, determines what make sa material a good penetrant?
A. Viscosity
B. Surface tension (answer)
C. Wetting ability
D. No one single property determines if a material will or will not be a good penetrant
36. Which of the following contaminants could affect the sensitivity of a penetrant?
A. Acid
B. Water
C. Salts
D. All of the above (answer)
37. Which of the test part characteristics listed below are normally considered before the specific liquid penetrant test method is selected?
A. The kind and size of discontinuities most likely to occur
B. The intended application for the part
C. The surface finish of the part
D. All of the above (answer)
38. Which of the following is a purpose of the drying process used in penetrant testing?
A. The drying process is used to assure that all excess penetrant will
B. The drying process assures the uniform drying of dry developer
applied over a wet emulsifier
C. The drying process reduces penetration time
D. After the application of a wet developer , the drying time aids in securing a uniform developer coating (answer)
39. The penetrant indications of a forging lap will normally be :
A. A round or nearly round indication
B. A cluster of indications
C. A continuous line (answer)
D. A dotted line
40. An important difference between non water-washable penetrants and water-washable penetrants is that:
A. Water-washable penetrants contain an emulsifier, while non waterwashable penetrants do not (answer)
B. The viscosity of the two penetrants is different
C. The color of the two penetrants is different
D. Non water-washable penetrants are more easily removed than are
water washable penetrants.
41. Which of the following is an advantage of solvent wipe methods over water-wasing?
A. No special lighting is necessary during inspection
B. They provide a quicker penetration of small openings
C. Small indications are more easily seen
D. They can easily be carried out in the field and remote areas (answer)
42. Which of the following is a discontinuitity that might be found in rolled bar stock?
A. Blow holes
B. Shrinkage laps  (answer)
C. Cracks and seams
D. Insufficient penetration
43. The part is an aluminum forging. desription-the indication is sharpe, half-moon shape, not deep, and is called a :
A. Lap (answer)
B. Center line porosity
C. Heat treat crack
D. False indication
44. Which of the following is a discontinuitiy that might be found in a forging?
A. Shrinkage cracks
B. Laps
C. Cold shuts (answer)
D. Insufficient penetration
45. Which of the following is a possible cause for false penetrant indications?
A. Excessive washing
B. Inadequate application of developer
C. Penetrant or part to cold during penetration time
D. Lint or dirt (answer)
46. Which of the following is the best reason why excessive drying of a part is not desired?
A. The extra time required is wasted
B. The developer may lose its blotting ability
C. A reduction in resolution may result (answer)
D. The excess developer may be difficult to remove
47. Flourescent materials used in flourescent penetrants respond most actively to radiant energy, of a wave length of approximately:
A. 7,000 Angstroms
B. 250 KV
C. 3,650 Angstroms (answer)
D. 100 foot candles
48. The emulsifier is used:
A. To wash the penetrant out of discontinuities
B. As a aid in washing off the surface of parts when using either the water or oil soluble penetrants (answer)
C. To emulsify the oil-soluble penetrant, thereby making it water washable
D. To preclean parts before applying penetrant
49. The prime purpose of the blacklight for fluorescent penetrant inspection is:
A. To magnify indications
B. To make the indications visible (answer)
C. To develop indications
D. To speed up inspections
50. Water-washable liquid penetrants differ from post-emulsification penetrants in that water-washable penetrants:
A. Can only be used on aluminum test specimens
B. Need not be removed from the surfaces prior to development
C. Have a soapy base
D. Do not need the application of an emulsifier before rinsing (answer)

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