NDT NDE ASNT Questions and answers for PT, LPI level II (6).

51.	Which of the following is the best reason why the application of emulsifier by a brush is not recommended?

A.	The brushing action mixes the emulsifier with the penetrant prematurely and irregularly, making accurate control of the
A.	emulsification time impossible

B.	Brushing does not always completely coat the part, thereby leaving a portion of the part difficult to wash

C.	Brushing in itself is not harmful, but many types of brush materials combine with the emulsifier agents resulting in penetrant and part contamination. (answer)

D.	Brushing results in a streaking appearance during inspection

52.	Developing powder should always be:

A.	Highly fluorescent

B.	Applied wet

C.	Colorless

D.	Evenly applied (answer)

53.	A crack type discontinuity will generlly appear as:

A.	A round indication

B.	A continuous line, either straight or jagged (answer)

C.	A straight, single solid line

D.	Random round or elongated holes

54.	Which of the following methods for applying non-aqueous developer is normally considered most effective?

A.	Spraying (answer)

B.	Swabbing

C.	Brushing

D.	Dipping

55.	Which of the following could be a source of false indications on a test specimen?

A.	Penetrant on the test table

B.	Penetrant on the hands of the inspector

C.	Contamination of dry or wet developer with penetrant

D.	All of the above (answer)

56.	Which of the following discontinuities might be found in sand castings?

A.	In complete penetration

B.	Undercut

C.	Pipe

D.	Shrinkage (answer)

57.	The part is an aluminum casting . Desricption– the casting has a very complex design. In one section there is a flat area having a thickness of 1/8 inch. In the center of this area is a round section 2 inches thick and 1 inch diameter. There are linear indications about 1/2 the distance around the base where it joins into the thin section. the indicationsis termed:

A.	Dross

B.	Hot tear (answer)

C.	Microshrinkage

D.	Porosity

58.	When penetrant testing for shallow discontinuities using a post-emulsification penetrant, the emulsification time should be long enough to:

A.	Mix the emulsifier with all the penetrant on the surface and in
A.	discontinuities (answer)

B.	Mix the emulsifier with penetrant in the discontinuities

C.	Allow the emulsifier to dry out to a white powder

D.	Mix the emulsifier with the excess surface penetrant only

59.	The function of the emulsifier in the post-emulsification penetrant method is to:

A.	More rapidly drive the penetrant into deep, tight cracks

B.	React with the surface penetrant to make the penetrant water-washable (answer)

C.	Add fluorescent dye or pigment to the penetrant

D.	Provide a coating to which dry powder developer can adhere

60.	The speed with which a penetrant penetrates a surface flaw is influenced to the greatest extent by which of the following properties?

A.	Density

B.	Surface tension and wetting ability (answer)

C.	Viscosity

D.	Relative weight

61.	Which of the following discontinuities could be classified as a primary processing discontinuity often found in cast material?

A.	Fatigue crack

B.	Stress-corrosion

C.	Porosity (answer)

D.	Lack of penetration

62.	Penetrant residues may become entrapped under splines, fasteners, rivets, etc. Which of the following is the most likely reaction caused by such a residue?

A.	Corrosion caused by the moisture attracted by such residues (answer)

B.	Paint stripping

C.	Fatigue cracking

D.	Lattice structure breakdown

63.	Which of the following characteristics are normally considered when selecting the type of penetrant to be used in a penetrant test?

A.	Removal characteristics of the penetrant

B.	The flash point of the penetrant

C.	The cost of the penetrant

D.	All of the above (answer)

64.	Developer assists in the detection of the visible dye penetrant test method by:

A.	Providing a clean surface

B.	Providing a contrasting background (answer)

C.	Providing a dry surface

D.	Emulsifying the penetrant bleed-out

65.	Rejection or acceptance of parts should be based on which of the following, in the absence of written acceptance criteria?

A.	The inspector’s education

B.	The design of the part and its intended application (answer)

C.	The appropriate penetrant standard

D.	The selection of the penetrant

66.	Shrinkage cracks are usually found in what areas of a casting?

A.	Thin sections only

B.	Heavy sections only

C.	Abrupt changes in thickness (answer)

D.	No longer a problem

67.	The tendency of a liquid penetrant to enter a discontinuity is primarily related to:

A.	The viscosity of the penetrant

B.	The capillary forces (answer)

C.	The chemical inertness of the penetrant

D.	The specific gravity of the penetrant

68.	The term ” non-relevant indication” is used to describe certain types of penetrant testing indications. which of the following would be a typical non-relevant indication?

A.	Indications due to part geometry or part design configurations (answer)

B.	Nonmagnetic indications

C.	Multiple indications

D.	Non-linear indications

69.	The part is a 1/2 inch thick aluminum plate with a vee weld. description- the indication appears in an area that is somewhat dish-shaped. the indication extends out from the center in a spoke formation. the indication is:

A.	Shrinkage

B.	Non-relevant (answer)

C.	A quench crack

D.	A crater crack

70.	A continuous line indication can be caused by which of the following discontinuities?

A.	Porosity

B.	Slag inclusions

C.	Pitting

D.	Cracks (answer)

71.	Which of the following is most apt to render the post-emulsification test ineffective?

A.	Too long of a penetrant time

B.	Too long of a developing time

C.	Too long of an emulsifying time (answer)

D.	None of the above

72.	Which of the following discontinuities could be classified as a finishing processing discontinuity?

A.	Fatigue crack

B.	Stress-corrosion

C.	Lamination (answer)

D.	Heat treat crack

73.	A commonly used method of checking on the overall performance of a penetrant material system is by:

A.	Determining the viscosity of the penetrant

B.	Measuring the wettability of the penetrant

C.	Comparing two sections of artificially cracked specimens

D.	All of the above (answer)

74.	Which of the following is an advantage of visible dye over fluorescent penetrants?

A.	Small indications are easily seen

B.	They can be used on anodized and chromate surfaces

C.	They make less background on rough surfaces

D.	No special lighting is required (answer)

75.	Prior to penetrant testing to a previously machined soft metal part, which of the cleaning methods listed below would be best to remove any smeared metal that could mask discontinuities?

A.	Etching

B.	Shot peening (answer)

C.	Alkaline cleaning

D.	Water cleaning with detergents

76.	Which of the following discontinuities might be found in rolled bar stock?

A.	Shrinkage

B.	Bleedout

C.	Laps (answer)

D.	Undercut