Level I Questions- General MAGNETIC PARTICLE TESTING LEVEL I TRAINING PROGRAMME
INSTRUCTIONS: - Do not write on the question paper or on reference materials. - Each questions has onl one answer - Select the most appropriate answers. !."#a$netic particle" is a non-%estructi&e e'amination metho% use% for (. locatin$ surface %iscontinuities. %iscontinuities. ). near surface %iscontinuities. C. *oth ( an% ). D. none of the a*o&e +. ,erroma$netic material lie Iron Steel Nicel an% co*alt are : (. stron$l attracte% * a ma$net. ma$net. ). capa*le of *ein$ ma$neti/e%. C. *oth ( an% ). D. not capa*le of *ein$ ma$neti/e% 0. The permea*ilit of a material %escri*es: (. the a*ilit to retain the ma$netic fiel%. ). the %epth of the ma$netic fiel% in the part. C. the len$th of time require% to %ema$neti/e it D. the a*ilit to ease ma$neti/e% the material easil 1. The retenti&it of a material %escri*es: (. the ease with which it can *e ma$neti/e%. ). the %epth of the ma$netic fiel% in the part . C. the len$th of time require% to %ema$neti/e it . D. the a*ilit to retain the ma$netic fiel%. 2. If a crac e'ists in a circular ma$net the attraction of magnetic particles to the crack is crack is cause% * (. a coerci&e force. ). a leaa$e fiel%. C. a %oppler effect. D. a hi$h reluctance at the crac.
3. 4hich of the followin$ will *est to %etect surface crac5 A. 6alf wa&e rectifie% (C B. DC C. (C D. Sur$e current
NDT/FT/MT-I/GEN/!
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TRAINING AND CERTIFICATION OF NDT PERSONNEL
Level I Questions- General MAGNETIC PARTICLE TESTING LEVEL I TRAINING PROGRAMME
7. 4hich statement is true when relate% to ma$netic lines of force5 (. The ne&er cross. ). The form close% loops C. The see the path of least resistance. D.(ll of the a*o&e. E. none of the a*o&e 8. #a$netic flu' lines which are parallel to a %iscontinuit pro%uce: (. stron$ in%ications ) ). wea in%ications. C C. no in%ications. D. fu// in%ications. 9.The ma$netism which remains in a piece of ma$neti/a*le material after the ma$neti/in$ force has *een remo&e% is calle% the: (. tramp fiel%. ). resi%ual fiel%. C. %ampe% fiel%. D. permanent fiel%.
!. Retenti&it: (. represents the a*ilit to in%uce ma$netism in a ferroma$netic *o% * an outsi%e ma$neti/in$ force. ). represents the a*ilit of a material to resist the esta*lishment of ma$netic flu' within it. C. represents the a*ilit of a material to retain a portion of the ma$netic fiel% set up in it after the ma$neti/in$ force has *een remo&e%. D. is not a term use% in ma$netic particle testin$. !!. #a$netic particle testin$ can *e con%ucte% on all: A. B. C. D.
ferroma$netic materials para-ma$netic materials %ia-ma$netic materials all of the a*o&e
. !+. (n electrical oe pro%uces : (. a lon$itu%inal fiel%. ). a circular fiel%. C. alternatin$ fiel%s. D. a DC fiel%.
NDT/FT/MT-I/GEN/!
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TRAINING AND CERTIFICATION OF NDT PERSONNEL
Level I Questions- General MAGNETIC PARTICLE TESTING LEVEL I TRAINING PROGRAMME
. !0. 4hich metho% of ma$netisation $i&en *elow is suita*le for %etectin$ the surface %iscontinuities5 (. 4et particles with (C current. ). Dr particles with 64DC current. C. Dr particles with DC current D. 4et particles with DC current . !1.4hich of the followin$ is an a%&anta$e of ma$netic particle testin$ o&er penetrant testin$5 (. ). C. D.
It can %etect surface %iscontinuities with forei$n material im*e%%e% in them It is faster on in%i&i%ual parts It can %etect near-surface %iscontinuities all the a*o&e
!2. ( cur&e is sometimes %rawn to show $raphicall the relation of the ma$neti/in$ force to the stren$th of the ma$netic fiel% pro%uce% in a certain material. This cur&e is nown as the: (. ). C. D.
!3. The Unit for ma$netic flu' lines are (. #a'well ). $auss C. tesla D. none
(nswer the *elow question *ase% of the fi$ure $i&en
!7. what is the tpe of current ha&e the a*o&e form5 NDT/FT/MT-I/GEN/!
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TRAINING AND CERTIFICATION OF NDT PERSONNEL
Level I Questions- General MAGNETIC PARTICLE TESTING LEVEL I TRAINING PROGRAMME
(. ). C. D.
64DC DC (C all a*o&e
(nswer the followin$ question from the $i&en *elow fi$ure
!8. (. ). C. D.
The line oa is %efine% as %otte% line ;ir$in cur&e 6steresis Cur&e all the a*o&e
!9.
+!. The material which ha&e permea*ilit less than ! (. ferro ma$netic ). para ma$netic C. %ia ma$netic D. ma$netic ++. lie poles (. attract ). repel C. none D. a an% * NDT/FT/MT-I/GEN/!
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TRAINING AND CERTIFICATION OF NDT PERSONNEL
Level I Questions- General MAGNETIC PARTICLE TESTING LEVEL I TRAINING PROGRAMME
+0. choose the *est metho% to ma$netise rin$s (. ). C. D.
Central con%uctor =oe >ro%s ( an% c
+1. Concentration of ma$netic particles were chece% with a? Normal @lass *? settlin$ flas c? *eaer %? all a*o&e +2. #a$netic particles shape shoul% *e a? Spherical *? Elon$ate% c? )oth %? None +3. (C oe liftin$ capacit is a? 1.2 $ *? 1$ c? +$ %? !$ +7. >re cleanin$ is necessar *ecause a? To remo&e %ust rust $rease *? To wash for *ri$htness c? Not nee%e% %? None. +8. The minimum output of *lac li$ht nee% for fluorescence particle test is a? ! A4Bcm+ *? 2 A4Bcm+ c? 0 A4Bcm+ %? ! A4Bcm+ +9. The colour of fluorescence of particles in Ultra&iolet li$ht is a? )lue *? @reen c? =ellow $reen %? Re% 0. The temperature at which ma$netic material *ecome para ma$netic is calle% as a? curie temperature *? room temperature c? melt temperature %? none
