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Penetrant LVL 3
| Question | Answer |
|---|---|
| 1. Chemical, water-based cleaners are often used for very dirty, greasy parts. If used: a. clean surface with solvent when done b. rinse surface to remove residue c. heat to remove detergent. d. clean surface with solvent cleaner | b. rinse surface to remove residue |
| 2. Vapor degreasing is considered best method of preparing parts for liquid penetrant exam as: a. removes all surface contaminants b. solvent removes petroleum materials c. method adapts to any part size d. solvent removes inorganic soils. | b. solvent vapor removes petroleum materials |
| 3. When penetrant is applied to parts by dipping, the parts should be: a. left in tank during dwell time b. set aside for entire dwell time. c. placed on rack to drip excess penetrant to dipping station. d. placed in alkaline solvent rinse tank. | c. placed on rack to drip excess penetrant to dipping station. |
| 4. Penetrant stations with reservoir tanks and recovery systems: a. homogeneous penetrants need no agitation. b. need agitation to prevent contaminant settling. c. pasteurized penetrant needs no agitation. d. organic contaminants not present. | a. do not need agitation as penetrants are homogeneous. |
| 5. Penetrant removal by spray water wash. crack penetrant would be harder to remove it if has: a. low viscosity b. high viscosity c. medium viscosity d. viscosity not important | b. high viscosity |
| 6. Most desired to remove surface penetrant is: a. remove some defect pene, and min surface pene b. remove some defect pene and no surface pene c. remove no defect pene and leave minimum surface d. remove no defect pene and leave no surface. | d. remove no defect pene and leave no surface. pene = penetrant |
| 7. Best method remove excess water wash penetrant: a. immerse in water b. water from tap c. boil in hot water d. Use hose nozzle with forceful droplets. | d. Use a hose and nozzle with forceful droplets. |
| 8. When removing excess post-emulsifiable penetrant in a production situation involving small irregularly shaped parts, one may use a: A. strong forceful spray. B. strong water blast. C. commercial solvent. D. hot water immersion. | A. strong forceful spray |
| 9. Wet developer sensitivity is impared by: A. developer temp is greater than is greater than ambient temp. B. when developer coating thickness is too heavy. C. adding corrosion inhibitors to developer. D. if the surface of the part is polished. | B. when the thickness of the coating becomes too heavy. |
| 10. When is a non-aqueous wet developer preferred? A. if dryer oven temp is above 250° F. B. When smooth even coating is needed. 5. Using a fluorescent penetrant on as-cast surface. D. When using a fluorescent penetrant on a wire brushed weld. | B. When smooth even coating is needed. |
| 11. The best drying method after applying a wet developer is: A. blotting surface with paper towel. B. allowing slow drying at ambient temp. 5. rapid drying with room temperature air blast. D. rapid drying with circulating hot air at 170-225° F. | D. rapid drying with circulating hot air at 170-225° F. |
| 12. Removing residual pene or developer by post clean is best if? A. It may interfere with later processes or service. B. It may provide background contrast C. It may assist emulsifying pene bleed out. D. It may assist lattice structure breakdown. | A. It may interfere with later processes or service. |
| 13. Post-cleaning is important where residual penetrant or developer materials may combine with other materials in service to produce: A. corrosive action. B. a contrasting background. C. false penetrant indications. D. proper surface tension. | A. corrosive action. |
| 14. Perform Post-cleaning: A. ASAP as materials are easier to remove. B. several hours later as drier mtls are easier to wipe off. C. with a warm part to enhance the solubility of penetrant D. with a chilled part to make materials lose cohesion. | A. ASAP as materials are easier to remove. |
| 15. For PE Fluores where sulphur/chlorine resid on small parts is harmful: A. low sulphur/chlorine pene used, part gets solvent wipe post-clean. B. fluores MTLS used + part is detergent-washed. C. low sulphur/chlorine pene MTLS + auto detergent wash | C. low sulphur/chlorine pene MTLS + auto detergent wash |
| 16. Reflected Black light shining in inspectors eyes causes “Eyeball fluorescence” A. may cause tissue damage. B. is harmless +of no consequence. C. is harmless + can be annoying D. is annoying, it will not impair inspector effectiveness. | C. is harmless + can be annoying |
| 17. Resid acids/chromates harm water-wash fluores as: A. all fluores dyes are affected. B. acids + oxidizers react with fluores dyes in water. C. acids + oxidizers react with fluores dyes in emulsifiers D. emulsifiers neutralize acids + chromates. | B. acids + oxidizers react with fluores dyes in water. |
| 18. Most penetrant materials have these adverse effects on operator health? A. Hazard due to their inorganic base. B. PT MTLS can cause dermatitis . C. PT MTLS have hallucinogens-cause drunkenness. D. PT MTLS have improved -virtually hazard free | B. PT MTLS can cause dermatitis . |
| 19. Which is advantage of (PE) methods over water-washable methods? A. Excess penetrant removal is by water spray. B. Their sensitivity is easy to control. C. The overall test time is shortened. D. They usually have higher sensitivity to tight cracks. | D. They usually have higher sensitivity to tight cracks. |
| 20. Which of items below are disadvantages of water-emulsifiable visible dye methods? A. Degree of sensitivity to acidity and alkalinity. B. Portability C. Test time D. Requirements of ordinary' light | C. Test time |
| 21 Investment casting penetrant exams shoud be: A. water-washable fluores for sensitivity + washability. B, solvent removable due to size and shape. C. PE fluores for max sensitivity washability. D. solvent removable for greater visibility. | C. PE fluores for max sensitivity washability. |
| 22 Which of the following techniques has been found to be effective for aiding penetration in certain instances in commercial application? A. Heating the penetrant. B. Vibration. C. Vacuum and pressure. D. Ultrasonic pumping. | B. Vibration. |
| 23. Dentists use liquid penetrant exams to: A. locate fine cracks in teeth before x-rays. B. locate defects in artificial teeth prior to mounting them. C. verify questionable information gathered from x rays. D. identify the filling material. | B. locate defects in artificial teeth prior to mounting them. |
| 24. For precleaning parts the recommended method, if practical, is: A. sand or grit blasters. B. solvent or chemical tanks. C. vapor degreasers. D. water-detergent washing machines. | C. vapor degreasers. |
| 25. For Fluores PT and wet developer, the dryer should be placed: A. before the emulsifier tank. B. after the developer tank. C. before the developer tank. D. after the wash unit. | B. after the developer tank. |
| 26. For water-washable fluorescent penetrant and dry developer, black light should be available: A. at the penetrant station. B. at the wash station. C. at the developer station. D. after the oven cycle. | B. at the wash station. |
| 27. When a large number of parts are inspected using dry developer which is applied by dipping. the tank should be equipped with: A. an exhaust system. B. an agitator. C. an electro-static charger. D. a developer replenisher. | A. an exhaust system. |
| 28. Filters for black lights effectively remove: A. natural white light. B, radiation of a wavelength above 3000 angstrom units. C. visible light from the energy given off by the mercury arc. D. fluorescence from the penetrant. | C. visible light from the energy given off by the mercury arc. |
| 29. Sensitivity of Super-bright hi fluorescent pene may be: A. more sensitive than color contrast pene B. as sensitive in dim daylight as in darkness. C. more sensitive than normal fluores pene but cant be used in daylight. D. less sensitive in dim | |
| 31. Use of high power spot bulbs for color contrast penetrants: A. should be avoided as too much glare may occur. B. will reduce eye fatigue. C. is acceptable if the light is shielded. D. is acceptable if the light is not shielded. | A. should be avoided as too much glare may occur. |
| 32. Wetting ability is measured by the A.specific gravity. B. density. C. contact angle. D. surface tension. | C. contact angle. |
| 33. Which of the following functions does a developer perform? A. Blots the penetrant by drawing it out of discontinuities. B. Masks out nonrelevant indications. C. Dry's out the surface of the part. D. Provides a non-contrasting background. | A. Blots the penetrant by drawing it out of discontinuities. |
| 34. What method uses color contrast penetrant in conjunction with a developer containing a low intensity fluoragent called? A.Fluorescent developer method. B.Reversed fluorescent method. C.Contrast fluorescent method. D.Reversed contrast method. | B.Reversed fluorescent method. |
| 35. For fluorescent penetrant methods, indications appear as: A. white gIow with gray background. B. yellow-green glow with white background. C. yellow-green glow with violet blue background. D. Yellow-green glow with black back ground. | C. yellow-green glow with violet blue background. |
| 36. A visible dye indication will usually appear as: A. a bright red glow against a white background. B. a red color against a grey background. C. a red color against a white background. D. a red color against a glowing white background. | C. a red color against a white background. |
| 37. For reversed fluores PT, inspection under black light: indications show as: A. dark spots on violet background. B. yellow spots on a glowing background. C. dark spots on a light glowing background. D. Method does not exist. | C. dark spots on a light glowing background. |
| 38.If indication reappears after orig developer removed and another coat applied: A. discontinuity contains penetrant reservoir B. discontinuity is shrinkage. C. discontinuity is most Iikely porosity. D. discontinuity is most likely a crack. | |
| 39. If on reprocessing, a faint ind does not reappear: A. it was probably a false indication. B. the area has been overcleaned . C. the indication is probably due to a small flaw. D. reprocessing has revealed the opening. | A. it was probably a false indication. |
| 40.A network of interconnecting jagged lines appearing in hard fired, unglazed ceramic products would be an indication of: A. thermal shock. B. large cracks C. shrinkage cracks. D. grinding cracks. | A. thermal shock. |
| 41. Porosity indications in ceramics would appear: A.more intense than porosity indicu tions in metals. B.essentially the same as porosity indications in metals. C.leee intense than porosity indications in metals. D.as minute cracks. | B.essentially the same as porosity indications in metals. |
| 42.When inspecting glass, looking for very fine cracks, the preferred method is: A.post-emulsifiable fluorescent. B.water-washable fluorescent. C.post-emulsifiable color contrast. D.electrified particle. | D.electrified particle. |
| 43.When inspecting a porous hard fired ceramic. Inspection results would be improved by using: A. A filtered particle method. B. An electrified particle method. C. A brittle enamel method. D. A emulsifiable color contrast method. | A. A filtered particle method. |
| 44.A partially welded forging lap would probably: A. give no indication. B. appear as a very thin, continuous line. C. appear as a broad, continuous line. D. appear as an intermittent line. | C. appear as a broad, continuous line. |
| 45. A ragged line of variable width and numerous branches on castings, caused by a difference in cooling rates between thich and thinner sections would most likely be an indication of: A.shrinkage. B.cold shut. C.hot tear. D.lap. | C.hot tear. |
| 46.A deep crater crack will frequently appear as a: A.small tight crack. B.rounded indication. C.fine linear indication. D.faint intermittent line. | B.rounded indication. |
| 47. The capillary attraction forces cause a liquid to rise spontaneously in a capillary tube. These forces are also involved in: A.entry of a liquid into a crack. B.solubility of a liquid. C.flash point of a liquid. D.chemical inertness of a liquid. | A.entry of a liquid into a crack. |
| 48. Viscosity has an effect on penetrant usage. It is an important factor in the: A.solubility of contaminants. B.washability of a penetrant. C.degree of fluorescence emitted. D. speed with which a penetrant will enter a defect. | D. speed with which a penetrant will enter a defect. |
| 49. Wetting ability is: A. measured by contact angle, not related to Sur Tens. B. like viscosity, incr as surface tension decr. C. measured by CONT angle, it decr as Sur Tens incr. D. measured by Sur Tension, it incr as CONT angle decr. | A. measured by contact angle, not related to Surface Tension. |
| 50.A penetrant that will spread over the surface of the test area in a smooth, even film despite a small amount of surface contamination is said to have: A. low viscosity. B. high viscosity. C. wetting ability. D. low evaporation. | D. low evaporation. |
| 51.The sensitivity of two penetrants lot crack detection is best compared by: A.using a hydrometer to measure specific gravity. B.using cracked aluminum blocks. C.measuring the contact angles in a wetting test. D.the Meniscus test. | D.the Meniscus test. |
| 52.For post-emulsifiable penetrants, a good method for establishing emulsifying time is by: A.experimental testing B.the water drop-through test. C.the water-tolerance test. D.using published book values. | B.the water drop-through test. |
| 53.The test used to measure the sensitivity of a penetrant to water contamination based on the amount of water is the: A. water drop through test. B. hydrometer test. C. photofluorometer test. D. water tolerance test. D. water content test. | A.water drop through test. |
| 54. A fresh wet developer batch: A. should be checked by a hydrometer. B. should be agitated for 30 to 40 minutes. C. should have ammonia added to stabilize the mixture. D. should stand for 4 to 5 hours prior to use. | D. should stand for 4 to 5 hours prior to use. |
| 55. Most accurate method to find light from FLUORES materials is: A. spectrophotometer. B. filter-photometer. C. nefluoro-photometer. D. photofluorometer. | D. photofluorometer. |
| 56. Value to evaluate FLUORES penetrant is: A. Light emitted by indications. B. Black Light needed to cause material to fluoresce. C. Light emitted by each FLUORES material. D. Light emitted by each FLUORES material compared to background. | C. the relative amount of light emitted by the fluorescent material compared to other penetrants. |
| 57. The most accurate method for evaluating quantitative valuee for the emitted light of fluorescent materials is the use of a: A.spectrophotometer. B.filter-photometer. C.nefluoro-photometer. D.photofluorometer. | A.spectrophotometer. |
| 58. Able to see IND: Contrast Ratio:Based on: A. white lite opposed to dye absorbed lite. B. BCKGRND RFLECT lite opposed to dye absorbed C. BCKGRND absorbed lite opposed to dye reflected lite. D. BCKGRND RFLECT lite opposed to dye reflected lite. | >>D. The relative amount of light emitted by the fluorescent material compared to the light emitted by the background. |
| 59.The contrast ratio of a red dye penetrant to a white developer is normally about A. 33 to 1. B. 6 to 1 . C. 9 to 1. D. 9 to 2. E. 23 to 1. | B. 6 to 1 . |
| 60. Sensitivity compared by cracked plated strips with iron plating. Bent on: A. Cantilever bending dies only. B. radial bending dies only. C. circumferential bending dies only. D. Cantilever and radial bend dies. | D. Cantilever and radial bend dies. |
| 61. Plated strip bend by cantilever bending die: Cracks will: A. be equally spaced and of uniform width. B. be equally spaced and of graduated depth. C. closer together and tighter near the clamped end. D. Cantilever bending dies are not used. | C. closer together and tighter near the clamped end. |
| 62. Penetrant Materials and test object should be within temperature range. Because colder penetrants: A. the viscosity decreases. B. the viscosity increases. C. fewer vola tile materials will be lost. D. the dyes degrade. | B. the viscosity increases. |
| 63. If test part surface temperature is excessive: A.the viscosity of the penetrant may be too high. B.the penetrant may lose some of its more volatile materials. C.the surface tension of the penetrant increases. D.the contact angle increases. | B.the penetrant may lose some of its more volatile materials. |
| 64. Which of the following is a criterion for a good dryer? A. Able to dry the surface slowly. B. Able to heat the part in min time so part is dry and warm. C. Have electrical heating elements to avoid contaminants. D. Be a warm air blast syetem. | B. Have ability to heat the part to an optimum temperature in a minimum of time so that the part is both dry and warm as promptly as possible. |
| 65. Properties of hi penetrating penetrant: A. Surface tension and viscosity. B. Viscosity and cosine -contact angle. C. Cosine -contact angle and density. D. Surface tension and cosine -contact angle. E. Density and surface tension. | E. Density and surface tension. |
| 66. What is observed when residue free solvent is used? A. Solvents don't remove grease. B. Solvents don't remove oil. C. Solvents should not be used for grease and oils. D. Solvents OK for remove grease/oil, not embedded solid soils. | D. Solvents OK for remove grease/oil, not embedded solid soils. |
| 67. In FPE Method,rinse step, prevent over-rinse? A. Rinse before penetrant is completely emulsified. B. Rinse after penetrant is completely emulsified. C. Stop rinse when surface penetrant removed from part. D. Rinse with water>than 110°F. | C. Stop rinse when surface penetrant removed from part. |
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