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Penetrant LVL 2

QuestionAnswer
1. Which physical properties determines what makes a material a good penetrant? a. viscosity b. surface tension c. wetting ability d. no one single property determines if a material will or will not be a good penetrant. d. no one single property determines if a material will or will not be a good penetrant.
2. 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 wetability c. viscosity d. capillary action d. capillary action
3. Which mercury arc UV bulb statements are false? a. UV bulb takes 5 min to warm up to full output b. line voltage drops to 90 V shut off bulb c. line voltage spikes to 120 V have no effect d. bulb will not respond if arc is extinguished c. line voltage spikes to 120 V have no effect
4. Disadvantage of using PT method? a. PT method cannot find disc not opened to the surface b. PT method has simple principles easy to understand c. PT method is simple in application d. PT method has few size and shape limitations a. PT method cannot find disc not opened to the surface
5. PT testing method? a. PT is less flexible than the eddy current b. PT is less reliable than MT for surface defects ferromag materials c. PT will not detect fatigue cracks d. PT is more reliable than RT for minute surface discontinuities d. PT is more reliable than RT for minute surface discontinuities
6. Which of the following types of discontinuities cannot be detected by the liquid penetrant test method? a. surface laminations b. internal forging bursts c. surface cracks d. surface laps b. internal forging bursts
7. Which of the following types of discontinuities could be classified as a primary processing discontinuity often found in cast material? a. fatigue crack b. stress corrosion crack c. porosity d. lack of penetration c. porosity
8. Which of the following discontinuities could be classified as a finishing processing discontinuity? a. fatigue crack b. stress corrosion crack c. lamination d. heat treat crack d. heat treat crack
9. Which of the following discontinuities could be classified as a service induced discontinuity? a. fatigue crack b. porosity c. machining tear d. lap a. fatigue crack
10. What part characteristics are considered before PT 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 d. all of the above
11. Which of the following foreign matter might block the openings of discontinuities if the surface of a test specimen is not properly cleaned? a. paint b. scale c. core and mold material d. all of the above d. all of the above
12. All of the following methods are recommended to remove grease from the surface of a penetrant test specimen except: a. vapor degreasing b. alkaline cleaning c. cleaning with solvent type material d. hot water rinsing d. hot water rinsing
13. The penetrant indication for a cold shut on the surface of a casting will be a: a. dotted or smooth continuous line b. cluster of small indications c. rough deep indication d. large bulbous indication a. dotted or smooth continuous line
14. The penetrant indication of a forging lap will normally be a: a. round or nearly round indication b. cluster of indications c. continuous line d. dotted line c. continuous line
15. When conducting a penetrant test, spherical indications on the surface of a part could be indicative of: a. fatigue cracks b. porosity c. weld laps d. hot tears b. porosity
16. Penetrant developer is commonly available in all of the following forms except: a. dry developer b. nonaqueous developer c. wet developer d. high viscosity developer d. high viscosity developer
17. Which of the following is a possible cause for false penetrant indications? a. excessive washing b. inadequate application of developers c. penetrant or part too cold during penetration time d. lint or dirt d. lint or dirt
18. Developer assists in the detection of penetrants retained in discontinuities by aiding the: a. postcleaning process b. emulsification process c. bleedout process d. drying process c. bleedout process
19. Developer assists in the detection of the visible dye penetrant test indications by: a. providing a clean surface b. providing a contrasting background c. providing a dry surface d. emulsifying the penetrant bleedout b. providing a contrasting background
20. When using PE penetrants, difficulties during the washing operation can be overcome by: a. reapplying the emulsifier b. increasing the water washing pressure used c. completely reprocessing the part d. dipping the part in boiling water c. completely reprocessing the part
21. Which of the following methods for applying nonaqueous developer is normally considered the most effective? a. spraying b. swabbing e. brushing d. dipping a. spraying
22. Of the methods listed below, the most effective means of precleaning a test item to remove organic contaminants such as grease prior to a penetrant test is: a. vapor degreasing b. detergent cleaning c. hot water rinse d. solvent wiping a. vapor degreasing
23. Fluorescent materials used in fluorescent penetrants respond most actively to radiant energy with a wavelength of approximately: a. 700 rim b. 250 kV c. 365 nm d. 1 klx (100 ftc) c. 365 nm
24. Remove excess penetrant for SRVD PT? a. solvent squirting surface < 276 kPa (40 psi) b. wiping: soaking wet cloth, then dry cloth c. wiping: solvent damp cloth, then dry cloths d. wiping: dry paper wipes, then solvent damp, then dry cloth d. wiping: dry paper wipes, then solvent damp, then dry cloth
25. Emulsifier time: a. is important but not normally critical b. is the time to rinse the emulsifier and excess penetrant from the surface c. is extremely important and will greatly affect test results d. should be as long as economically practical c. is extremely important and will greatly affect test results
26. Before PT test of soft metal part, which of the cleaning methods listed below would best remove any smeared metal that could mash discontinuities? a. etching b. shot peening c. alkaline cleaning d. water cleaning with detergents a. etching
27. Why is the drying process used in penetrant testing? a. to ensure that all excess penetrant will evaporate b. ensures uniform drying developer over a wet emulsifier c. reduces penetration time d. aids in getting a uniform developer coating d. aids in getting a uniform developer coating
28. Why excessive drying of a part should be avoided? a. the extra time required is wasted b. the developer may lose its blotting ability c. a reduction in fluorescent brilliance may result d. the excess developer may be difficult to remove c. a reduction in fluorescent brilliance may result
29. Variables considered to use development time required for indication as a measure of the extent of the discontinuity? a. penetrant type and technique sensitivity b. discontinuity type c. temperature of tested component d. all of the above d. all of the above
30. For F.P.E. testing, emulsifier time is allowed to remain on the part is critical when detecting shallow scratchlike discontinuities. The actual length of time should be: a. 10 s b. 5 s c. 2 to 3 s d. determined by experimentation d. determined by experimentation
31. Which statement on component surface contamination is false? a. may reduce penetrant color or fluorescence b. may reduce capillary action c. may retain penetrant and increase exam sensitivity d. may fill disc and prevent penetrant entry c. may retain penetrant and increase exam sensitivity
32. WW penetrants differ from PE penetrants: a. can only be used on aluminum test specimens b. do not need to be removed from surfaces prior to development c. have a soapy base d. do not need the application of an emulsifier before rinsing d. do not need the application of an emulsifier before rinsing
33. Emulsifier in PT method is to: a. more rapidly drive penetrant into deep, tight cracks b. react with and makes penetrant water washable c. add fluorescent dye or pigment to the penetrant d. provide a coating which developer can adhere b. react with and makes penetrant water washable
34. PE Testing for shallow discontinuities, emulsification time should: a. mix emulsifier with excess surface PT b. mix emulsifier with surface and disc PT c. mix emulsifier with disc PT d. allow emulsifier dry to white powder a. mix emulsifier with the excess surface penetrant only
35. Avoid these penetrant practices? a. applying emulsifier by dipping b. applying developer by spraying the part with developer c. removal of water washable penetrant with a water spray d. applying emulsifier with a brush d. applying emulsifier with a brush
36. Method to check overall performance of a liquid penetrant system is by: a. determining the viscosity of the penetrant b. measuring the wetability of the penetrant c. comparing sections of artificially cracked specimens d. all of the above c. comparing sections of artificially cracked specimens
37. Difference between WW & nonWW penetrants is that: a. WW penetrants contain an emulsifier b. viscosity of two penetrants is differs c. color of two penetrants differs d. NonWW penetrants are more easily removed than WW penetrants a. water washable penetrants contain an emulsifier while nonwater-washable penetrants do not
38. 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. sensitivity level c. the cost of the penetrant d. all of the above d. all of the above
39. Which materials should be avoided in the penetrant system when testing titanium alloys? a. carbon or oil b. halogenated solvents c. emulsifier or oil d. fluorescent agents b. halogenated solvents
40. Which of the following is a discontinuity that might be found in sand castings? a. incomplete penetration b. undercut c. pipe d. shrinkage d. shrinkage
41. Which of the following is a discontinuity that might be found in a welded fabrication? a. shrinkage b. lack of fusion c. seams d. laps b. lack of fusion
42. Which of the following is a discontinuity that might be found in rolled bar stock? a. shrinkage b. bleedout c. laps d. undercut c. laps
43. Which of the following is a discontinuity that might be found in rolled plate? a. laminations b. shrinkage e. lack of fusion d. undercut a. laminations
44. Which of following contaminants could affect sensitivity of penetrant? a. acid b. water c. salts d. all of above. d. all of above.
45. Which of the following is a discontinuity that might be found in a forging? a. shrinkage cracks b. laps c. cold shuts d. insufficient penetration b. laps
46. Which of the following is a discontinuity that might be found in rolled plate stock? a. shrinkage cracks b. inclusions c. forging laps d. blow holes b. inclusions
47. Which is advantage of F. PT over visible type penetrants? a. exam performed in a well lighted area b. small indications are more easily seen c. exam performed where water contact objectionable d. method less sensitive to disc contamination b. small indications are more easily seen
48. Which is advantage of SRVD PT over F.PT? a. small indications are more 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 d. no special lighting is required
49. Which is advantage of SRVD PT over WW? a. no special lighting required 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 to remote areas d. they can easily be carried out in the field and to remote areas
50. The tendency of a liquid penetrant to enter a discontinuity is primarily related to the: a. viscosity of the penetrant b. capillary forces c. chemical inertness of the penetrant d. specific gravity of the penetrant b. capillary forces
51. The emulsifier is used: a. to wash penetrant out of disc b. to aid in washing off the part surface for WW or oil soluble penetrants c. to emulsify oil soluble penetrant, making it water washable d. to preclean parts before applying penetrant c. to emulsify the oil soluble penetrant, thereby making it water washable
52. The prime purpose of the ultraviolet light for fluorescent penetrant inspection is to: a. magnify indications b. make the indications visible c. develop indications d. speed up inspection b. make the indications visible
53. Why is it advisable to have an ultraviolet light installed at the wash station? a. to perform exam without drying parts b. to speed bleedout from defects c. to check wash cycle effectiveness d. to find if parts have been covered with penetrant c. to check wash cycle effectiveness
54. Developing powder should always be: a. highly fluorescent b. applied wet c. colorless d. evenly applied d. evenly applied
55. When viewing parts, fluorescent background may indicate: a. poor washing b. insufficient emulsifying time (postemulsification method) c. porous material and coating d. improper cleaning before penetrant cycle e. all of the above c. porous material and coating
56. Without written acceptance criteria, rejection or acceptance of parts should be based on the: a. inspector’s education b. design of the part and its intended application c. appropriate penetrant standard d. selection of the penetrant b. design of the part and its intended application
57. When improper processing causes inspection difficulties, what should the inspector do? a. swab parts with a solvent b. use a correct bleedback procedure c. erase nonrelevant fluorescence d. reprocess the part d. reprocess the part
58. Which of the following is most likely to render the postemulsification test ineffective? a. the penetrant time is too long b. the developing time is too long c. the emulsifying time is too long d. none of the above c. the emulsifying time is too long
59. 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 c. with a dry paint brush d. by dipping b. so that a light dusting covers all surfaces to be inspected
60. Which factor would apply in determining the dwell time required for the penetrant to be effective? a. type of discontinuity sought b. shape of part c. size of part d. surface roughness a. type of discontinuity sought
61. The part is an aluminum forging. Description — the indication is sharp, halfmoon shaped, not deep. It is called: a. a lap b. center line porosity c. a heat treat crack d. a false indication a. a lap
62. On 0.5" thick aluminum plate with a Y weld. The indication appears dish shaped and extends out from the center in a spoke formation. The indication is: a. shrinkage b. nonrelevant c. a quench crack d. a crater crack d. a crater crack
63. On aluminum casting of complex design, flat area 1.3" thick, center is 2.0" thick and 1.0" dia. Linear Ind half way around base it joins thin section. Ind is called: a. dross b. hot tear c. microshrinkage d. porosity b. hot tear
64. Shrinkage cracks are usually found in what areas of a casting? a. thin sections only b. heavy sections only c. at abrupt changes in thickness d. no longer a problem c. at abrupt changes in thickness
65. Which of the following is a discontinuity that might be found in a forging? a. shrinkage crack b. lap c. hot tear d. lamination b. lap
66. Which of the following is a discontinuity that might be found in rolled bar stock? a. blow hole b. shrinkage lap c. crack or seam d. lack of penetration c. crack or seam
67. Which of the following would be a typical nonrelevant indication? a. indications due to part geometry or part design configurations b. nonmagnetic indications c. multiple indications d. nonlinear indications a. indications due to part geometry or part design configurations
68. What is danger of sandblast cleaning penetrant tested surfaces? a. discontinuities may be closed b. oil contaminants might be sealed in discontinuities c. sandblasting sand forced into discontinuity d. sandblasting may create discontinuities a. discontinuities may be closed
69. A continuous linear indication can be caused by which of the following discontinuities? a. a continuous linear porosity b. slag inclusions c. pitting d. cracks d. cracks
70. 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 d. all of the above
71. A crack type discontinuity will generally appear as: a. a round indication b. a continuous line, either straight or jagged c. a straight, single solid line d. random round or elongated holes b. a continuous line, either straight or jagged
72. Which of the following discontinuities would be impossible to detect using a liquid penetrant test? a. a forging lap b. a crater crack c. grinding cracks d. nonmetallic internal inclusions d. nonmetallic internal inclusions
Created by: urbergpm9276