PT Level-1 __ QUESTIONS.pdf

PT Level-1 __ QUESTIONS.pdf - NDT TESTMAKER MATERIALS...

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Unformatted text preview: NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM Question: 1 Black light intensity from a standard mercury vapour lamp may vary due to a) aging b) dirt on the filter c) both a and b d) none of the above Question: 2 Inspection of a part without sufficient development time can result in a) false indications b) irrelevant indications c) missed indications d) none of the above Question: 3 Water suspendible developers have the advantage of a) speeding up application of developer b) application to many small parts at one time c) quick thorough coverage over all surfaces d) all of the above Question: 4 Specific gravity is checked using a a) hygrometer b) hydrometer c) three point balance d) litmus paper Question: 5 If a discontinuity is wider than it is deep the best LPI technique is to use 1 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM a) water-washable penetrant b) post-emulsifiable penetrant c) solvent removable penetrant d) visible dye penetrant Question: 6 In addition to providing quick drying developer, solvents in solvent suspendible developers a) aid in post cleaning b) eliminate the need for emulsifiers c) dissolve penetrant and give it a greater mobility d) none of the above Question: 7 The method used to apply developer is determined by a) type of developer used b) size of test piece c) facilities available d) all of the above Question: 8 The best source of useful blacklight for fluorescent penetrant testing is a) sunlight b) tungsten inert gas c) mercury-vapour arc d) incandescent tungsten Question: 9 A desirable physical property for a developer to have is a) high capillary efficiency b) high solubility 2 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM c) high absorption coefficient for white and black light d) low thermal expansion Question: 10 For manual inspection of many small parts, the preferred penetrant application method is a) aerosol spray b) hose and nozzle c) basket dipping d) electrostatics Question: 11 If you use "paint spray" type pressurized containers it is possible to apply _______ using the expendible technique. a) penetrant b) water suspendable wet developer c) solvent suspendable wet developer d) all of the above Question: 12 Post emulsifiable penetrants can be made with a) high tolerance to water b) very high brilliance dyes c) anthrax d) none of the above Question: 13 If the concentration of water suspendable wet developer is found to be above recommended levels a) it is discarded b) more water is added c) more developer is added 3 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM d) the mixture is heated to 80 degrees C. Question: 14 Suitability of a particular penetrant for a specific application would not be determined by a) sensitivity test b) fluorescent brightness comparison test c) flash point test d) developer wetting ability Question: 15 The best way to increase black light intensity at the work surface is to a) use a higher voltage b) reduce the filter thickness c) bring the black light closer to the work surface d) use fluorescent lights Question: 16 Although not the most valuable or reliable method of evaluation, this is the most popular LPI evaluation tool, a) cracked aluminum comparator block b) hydrometer c) light meter d) nickel-chrome test panels Question: 17 Optimum placement distance for inspection with a 100 watt portable spot blacklight is a) 200 cm b) 350 cm c) 500 cm d) 750 cm 4 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM Question: 18 The temperature at which the vapour-air mixture first ignites is called a) dew point b) ignition temperature c) flash point d) vapour point Question: 19 Liquid penetrant testing of billets a) can detect lack of fusion b) prevents oxide build up c) is used to eliminate defects which may result after rolling d) is not recommended Question: 20 Cracks in plastics occur a) upon cooling from a molten state b) during handling and assembly c) as a result of inservice operations d) all of the above Question: 21 If it is possible to salvage a part after visible LPI locates a defect a) reinspection is not necessary b) the indication may be left on for the person repairing it c) reworking must occur immediately d) none of the above Question: 22 5 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM If a penetrant has a water tolerance of 20%, it would be permissible to use it until the water content reached a) 2% b) 18% c) 20% d) 22% Question: 23 If the washing (removal) of excess penetrant is insufficient the result will be a) false indications b) missed defect c) poor contrast d) removal of shallow defects Question: 24 Water re-cycling systems are used in high volume penetrant inspection systems to a) reduce the volume of pollutants b) increase washability of hydrophilic emulsifiers c) save money d) none of the above Question: 25 In testing of aluminum plate, liquid penetrant testing is preferred over ultrasonics to locate a) very fine porosity b) bursts c) laminations d) crater cracks Question: 26 Solvents in the make-up of some post emulsifiable penetrants may attack 6 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM a) chrome b) titanium c) brass d) plastic Question: 27 Colour contrast dye is added to penetrants in order to give a) stability to the carrier base b) good visibility to flaw indications under white light c) good visibility to flaw indications under black light d) a compatible chemistry to the developer Question: 28 The single most important property that a penetrant must have is a) density b) viscosity c) wetting ability d) no single property is more important than any other Question: 29 Ascertaining the acceptability of a defect indication is called a) interpretation b) evaluation c) rejection criteria d) viewing Question: 30 The human eye becomes more sensitive to light when a) dark adapted b) light adapted 7 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM c) t.v. adapted d) sleeping Question: 31 Thickness of developer is a) not critical b) regulated by drying time c) a determining factor in sensitivity d) all of the above Question: 32 Wet developer can be agitated using a a) paddle b) constant dipping c) circulation pump d) all of the above Question: 33 For hand wipe penetrant removal solvents can be used for penetrant removal a) if applied to the part as a fine mist b) by flow on if the part is rough c) if applied by a lightly moistened cloth d) under no circumstance Question: 34 Which of the following are you likely to find on an LPI procedure? a) brand name and type of penetrant used b) details of pre-cleaning, application and dwell time c) details of removal, developer and development time d) all of the above 8 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM Question: 35 To inspect large parts, penetrant dip tanks can be equipped with a) re-enforced steel legs b) expandable walls c) hose, nozzle and pump d) hydraulically lifted drain racks Question: 36 A cooler in conveyor LPI inspection system is a) a quench tank b) used to cool parts coming from the drier c) set at 4 degrees C. d) never used Question: 37 The developer carrier liquid a) is always alcohol b) must be of low density c) must have medium viscosity d) provides the vehicle to distribute developer evenly and at the proper thickness Question: 38 False indications or noise from excess background penetrant should be noticed a) at the time of inspection b) by the level I operator c) at the wash station d) only in fluorescent inspections Question: 39 9 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM A minimum kit for colour contrast penetrant inspection would include a) pre-cleaner, penetrant, emulsifier, developer b) penetrant, developer, solvent remover c) pre cleaner, developer, penetrant, solvent remover d) none of the above Question: 40 Bleed out of penetrants from a defect to be exposed by the absorbing developer is called a) messy b) an observation c) an indication d) a crack Question: 41 Which is not an advantage of wet developer? a) easy to apply to large numbers of small parts b) completeness of coverage c) sharper definition d) easy to apply to very large parts Question: 42 For locating very tight surface cracks the penetrant should be a) of high penetrating ability b) used with wet developer c) colour contrast solvent removable d) none of the above Question: 43 If wet developer is used the drying station is located a) before the emulsifier station 10 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM b) before the developer station c) after the developer station d) after the inspection station Question: 44 The main defects found in die castings are a) slag and porosity b) porosity and shrinkage c) shrinkage and sand inclusions d) cold shuts and cold shots Question: 45 Many lubricating oils are somewhat fluorescent and penetrate well. If not removed they may result in a) excessive bleedout b) false indications c) double intensity of indications d) excessive indications Question: 46 Harmful UV and annoying white light are eliminated from the mercury vapour arc by a) signal averaging b) convolution c) deconvolution d) filtering Question: 47 When testing a vessel for leaks when the vessel cannot be sealed, penetrant is a) applied in a vacuum chamber b) applied in a larger pressure vessel 11 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM c) used to fill the vessel d) mixed with a sealant Question: 48 Strong acids or bases used to preclean parts may be present after precleaning. These can be removed by a) water rinse b) a neutralizing rinse c) both a and b d) none of the above Question: 49 Inspection tables under the black light should be kept clean to a) prevent smearing of indications b) prevent false indications c) prevent interfering fluorescence d) all of the above Question: 50 When penetrant testing is used for leak detection and a glass tank found to be leaking it is important to establish if the leak source is from a) porosity b) a crack c) now fusion d) the source is not important if leaking Question: 51 The function of developer is to a) soak up excess penetrant b) absorb black light c) make penetrant visible at defects 12 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM d) none of the above Question: 52 Most comparison tests of penetrant materials are done a) with a black light b) with aluminum test blocks c) against a reference standard d) at the start of each shift Question: 53 The biggest problem with doing penetrant testing on rough surfaces is a) low penetrability of the rough surface b) limited application methods available c) the inability to use plastic developers d) difficulty in removing excess penetrant Question: 54 Developer fluorescence resulting from contamination by penetrant is tested for by a) oil and whiting b) black light c) photofluorimeters d) galvanometers Question: 55 It is customary for LPI inspectors to have eye examinations to test for a) visual acuity b) colour vision c) distance perception d) all of the above 13 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM Question: 56 Eyeball fluorescence results from direct or reflected blacklight to the eye. The result is a) annoying but harmless b) interference with vision during inspection c) both a and b d) none of the above Question: 57 Certification of personnel is a) regulated by a central government agency b) the responsibility of the testing company c) given only after examination d) different in different countries Question: 58 Water suspendible developer, if required to be removed, is best removed by a) sand blasting b) warm water and detergent c) tri-chlorethanal d) steam cleaning Question: 59 Hydrophilic emulsifiers are applied by a) immersion b) dip c) spray d) all of the above Question: 60 Rinsing of visible dye penetrant 14 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM a) can only be done with approved nozzle spray b) continues until the red colour is removed from the surface c) should not take more than 15 seconds d) should not take more than 45 seconds Question: 61 Lighting for colour-contrast inspection should be a) high intensity spot lights b) bright white light c) equal amounts of UV and white light d) all of the above are alright Question: 62 Liquid penetrant testing can be done on essentially a) all none magnetic materials b) any none-radioactive solids c) any material d) any solid and non porous material Question: 63 The process of inspecting a part for surface or sub-surface defects without altering or damaging the part is called a) quality control b) non destructive testing c) statistical analysis d) eddy current testing Question: 64 Penetrant inspection will find most defects which a) have a depth equal to or greater than width 15 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM b) are found in non-ferrous materials c) break the surface of non porous solids d) cannot be found by eddy current Question: 65 The way in which penetrant enters a defect is by a) gravity b) negative pressure c) positive pressure d) capillary action Question: 66 In which of the following could even a small leak render the component useless? a) a vacuum housed semiconductor b) a natural gas pipeline c) a crude oil tank d) a steam generator boiler Question: 67 Almost invariably, all high volume production line liquid penetrant inspection systems have a) conveyorized production lines b) customized dip tanks c) electrostatic spray application of developer d) all of the above Question: 68 The penetrant technique employing a solvent suspension developer with a low intensity fluoragent is called a) the leaker technique b) reversed fluorescence 16 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM c) oil and whiting d) normal wet development Question: 69 Liquid penetrant testing has its main advantage in that it is a) the cheapest NDT method b) essentially a simple method c) the least hazardous method d) used on aircraft parts Question: 70 Detectability of LPI indications can be improved by a) neutron bombardment b) magnifying glasses c) white light filters d) none of the above Question: 71 Storing penetrants at too low a temperature can result in a) separation of dye from other components b) increasing the flash point c) explosion d) decreased penetrability Question: 72 Drying time does not apply to the period of time after the application of a) penetrant b) wet developer c) water wash d) none of the above 17 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM Question: 73 Materials used in liquid penetrant inspection should be checked against an unused standard a) daily b) annually c) periodically depending on the material and property d) by the manufacture Question: 74 A group of compatible penetrants, cleaners and developers is called a a) group b) sub-unit c) factor d) family Question: 75 An indication resulting form poor washing of a rough surface results in a) porosity b) rejections c) non-relevant indications d) false indications Question: 76 When applying dry powder developer it is important to ensure a) the powder is well mixed b) the part is completely dry c) the part is above 25 degrees C. d) all of the above 18 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM Question: 77 Drying after application of wet developer is best achieved by a) wiping b) air blast c) slow drying at room temperature d) hot air drying Question: 78 When measuring blacklight intensity with an appropriate light meter you should use a) a filter that passes UV light only b) a filter that passes white light c) a filter that blocks infra-red d) no filter Question: 79 Standard crack test samples eventually become unusable because a) the cracks become too large to be reliable b) residues build up an prevent penetrant entering cracks c) of too many finger prints d) emulsifier etches the crack edges Question: 80 Compared to fluorescent penetrants, the amount of dye content in colour-contrast penetrants is a) much higher b) less c) about the same d) varies depending on application Question: 81 19 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM Leak detection using liquid penetrant techniques gives best results on a) thick materials b) thin materials c) plastic materials d) ceramics Question: 82 Hydrophilic emulsifiers are preferred over lipophilic emulsifiers because a) they are cheaper b) they allow better control of removal c) drying time is reduced d) bleedout time is reduced Question: 83 The least likely system to contain contaminants or degradation of its constituents is a) kits using aerosol-spray cans b) automated dip tanks c) small manual dip tank baths d) none of the above Question: 84 As time increases from the time of developer application, indications appear and reach optimum clarity. Further development results in a) no change b) increased visibility c) reduced resolution and intensity d) reversal Question: 85 Which of the following quartz tube mercury arc lamps are not recommended for LPI inspection 20 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM a) 400 watt flood b) 100 watt flood c) 100 watt spot d) all of the above Question: 86 Water wash penetrant a) is not available in fluorescent form b) requires only wet developer be used c) has the longest bleed out time d) incorporates an emulsifier Question: 87 Cracked aluminum comparator blocks and chrome surface crack test panels provide a) quantitative comparisons of materials and techniques b) qualitative comparisons of materials and techniques c) a means of estimating crack depths d) none of the above Question: 88 A safety advantage of most dyes is that they have a) low toxicity b) low flash point c) chemical inertness d) low volatility Question: 89 Plastic film developers are used a) on plastics only b) for maximum sensitivity 21 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM c) if permanent records are wanted d) all of the above Question: 90 If a part that has been tested with a post emulsifiable penetrant does not rinse clean it should be a) put back into the emulsifier bath b) rinsed again with hot water c) rinsed again using higher water pressure d) reprocess the part starting with precleaning Question: 91 Water-wash fluorescent penetrants a) incorporate an emulsifier with the penetrant b) require no black light c) are the least expensive penetrants d) can be used only with wet developer Question: 92 Excessive contamination of emulsifier in tanks by penetrant will result in a) reduced emulsifier activity b) longer emulsification dwell times c) difficulty rinsing emulsified penetrant off d) all of the above Question: 93 Penetrants that include an emulsifier as part of their make-up are called a) water-washable b) colour contrast c) fluorescent 22 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM d) hydrophilic Question: 94 A property a penetrant need not have is a) fine grained particle structure b) easy and even applicability c) high solubility in water d) easy removal Question: 95 The most obvious and therefore most troublesome source of pollution from LPI materials is a) remover solvents b) dyes c) developer powders d) emulsifiers Question: 96 The rinsing aid required in the post-emulsifiable technique is a) water b) sponge or rag c) emulsifier d) black light Question: 97 Which is not a desirable quality of an emulsifier? a) high volatility b) high tolerance to contaminating water c) high tolerance to contaminating penetrant d) non-toxic 23 NDT TESTMAKER - MATERIALS RESEARCH INSTITUTE Mar 31, 2012 - 07:47 AM Question: 98 Mercury vapour lamps contain a small quartz tube which houses a) electrodes b) heater element c) mercury d) all of the above Question: 99 Which is not a ...
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