Ses 2001 2:18:13:40:37 question | Ferromagnetic material is \ strongly attracted by a magnet. rable of being magnetized. © both A and B. hot capable of being magnetized. Question it a current is pa will surround the sed through an electrical conductor, what conductor? ‘dy current field 1. Current ©. Magnetic field D_ Residual field Question 3 The magnetic field is strongest when \ the magnetizing voltage is Nowing B. the magnetizing current is flowing. «the material exhibits high coercive forces 1 the magnetizing current is not flowin: Question 4 The magnetism which remains in a piece of magnetizable material after the magnetizing force has been removed is called the: \ tramp fickd B residual field © damped field 1) permanent tieldQuestion 3 Demagnetszationy \ may be accomplished by heating a material above its Curie Point B as always necessary wan be performed only with AC 2) can he performed only with DC. Juestion 6 Which ot the tollowing is an advantage oF magnetic particle over penetrant testing? esting \_ It can detect surfuce discontinuities with foreign material imbedded in them: 8 Cis taster on individual parts. © Ttcan detect near-surface discontinuities Ail of the above Duestion The proper number of ampere-turt Jetermined by \s for a given test specimen is \ ity length and diameter the material «both the dimensions and the material Dats diameter Question 8) When preparing an inspection bath, the amount of magnetic particles per wallon of Huid is called its neasuring scale. 8 particle number, \ Stength or concentration fe LimitsQuestion 9 Fluorescent mag nde icle indications should be inspected wie pi \ Huarescent light Hany light black hight > won hight duestion 1, Why shiutla parts be cleaned after demagnetization? \. fe assure that the magnetic particles are removed 15. To prevent false indications To save the solids of the suspension To prevent cracking during heat treatment suestion UL \ specimen may be dema neethods? netized by which of the following \. Heat treatment above eurie temperat BAC coil © Reversing DC fields 1. Alb ot the above ‘Question Magnetic particle inspection detecting not a reliable method of \ taps B. deep seated cavities cracks Question 13) Which of she tollowir will best define sur \ Hall wave rectified AC B De MC 1) Surge current(Question 14 Using the residual test method, a number of parts are magnetized snd Lid on a rack prior to application of magnetic particles. Why is it important that they do not rub or touch each other? \ Phere 1s possible toss of the ma Blt may cause magnetic writ © We may damage the part 1 Tt makes parts hard to handle ie field Question 15 \ coil arounel the part produces \ acueular field. 1a tongitudinal field. either ar B depending on the type of current applied 1) am intermittent field, Question 16 The strength of the wet suspension should be maintained at a given level because: \ a tow evel m 1. a high level may © both A and B. D> none uf the above ive weak indication give heavy background. \Juestion 17. The retentivity of a material describes \ the ease with which it can be magnetized Hi the depth of the magnetic field in the part the length of time required to demagnetize it the ability 1 retain the magnetic field. Juestion 1S \n electrical yoke produces: \ a longitudinal field 1 a circular field alternating fields: asw fieldguestion 19 The flu within and surrounding a magnetized part or around a conductor curry ing a current is known as: \ stturation port 8. magnetic field © ferromagnetic 9 paramagnetic Question 20 in longitudinal ma netizing Loree Is yetization the proper term for calculating 4 amperes B ampere-turns, walls » ohms ‘Question, When magneuizing a weld in two directions. and if the current used in the fist direction iy 750 amps and the current in the second direction is 400 amps, which of the following is true? \. The part should be checked to see if demagnetization between perations is necessary No precautions shouid be taken before the second operation © This is not a valid technique. 1 There is no need to magnetize a weld in two directions. eo stion 2 s¢ undications are caused by magnetic particles being held to iy art by which of the following me: A. Gravity 1. Mechanical © Both A and B D_ None of the aboveJuesten What rule describes the direction of current flow (+ to =) when Ines of magnetic foree surround a conductor? \ Lett band rule 8 Right hand rule Flux rule ) Reluctance rule Question Phe major factor that determines the suc particle inspection ts the: sss of magnetic \ field sength 8 voltage on ma © current through the coil Dame of magnetization. Question \dleteet open 1 the sur Sharp sand distinet 1 wide and indetinite 1. high and tuzzs Question 20 \ magnetic particle build-up from a discontinuity is strongest when the discontinuity is oriented: \ 180d B 45 deg 90 des 90 de wees to the magnetic field wes io the magnetic field wes to the magnetic field ees 10 the current flow. (Question The area of maximum induced field strength using a yoke is: \ at the North pole of the yoke. Bat the South pole of the yoke. ©. the area directly between the poles. 1 on the outsile oF pole pieces.uestion 2S Inspecting @ part by magnetizing, removing the current flow, hen applying the medium is called the: \- contimuous method. H wet method residual method 1) dry method! Jltvestion 29. Magnetic Hux lines which are parallel to a discontinuity nroduce \ strong indications WB weak indications hho inglications, 2 fuzzy indications. Juesion 30) The strength of the magnetic field induced in a part relerred tas \ current density 8 voltave © flux density 1) retentivity ‘Question 41 Which brings out surface indications most clea vA Be Pulsed DC Fb DC with surge Question 32 The strongest magnetic field in a coil is at the: \ otutsade B. inside eu ©. center 1 entduestion 33 \ part is adaptable to magnetic particle inspection if \ iis attached to an electrostatic field 15 the material is ferromagnetic the material 1s non-ferrous. 1) the material is an electric conductor Question 34 In cireular magneuzation, the magnetizing force is expressed in What term is used to express magnetizing force in netization? amperes. Jomgitudinal ma \ amperes mpere-turns © consequent poles De walts Question 33 \ longitudinal surtace crack in a circularly magnetized part will eatise: \ the magneue field to die out 18 av decrease in permeability. sammtgnetic leakage field 1) current to flow Question 36 When there is absolutely no pattern or distribution of mag particles. the possible cause is that + the material 1s nonmagnetic the amperage setting is too low. © no current is being applied 2) aany of the above could be true ‘Question 37 Which ype of current has a "skin effect? LAC BC hall wave reetitied: » full wave rectified(Question 38 \ curve is sometimes drawn to show graphically the relation of the magnetizing force to the strength of the magnetic field produced in ai certain material. This curve is known as the: \ magnet toree curve, 8. hysteresis curve © saturation curve D. induction curve \uestion 39, The amount oF amperage used for magnetic particle inspection ssing the prod method is determined from the \ type of material B. distance berween the prods © diameter of the part ‘otal length of the part guestion 40. \ metal that ts difficult to ma netize is suid to have: permeability Blow permeability © high reluctance Pe low retenuviny duestion 41 The areas on a magnetized part from which the mag caving or returning into the part are called: \. saluent poms. sletects magnetic potes Question 42 Magnetic particle” 1s nondestructive examination method used \ locatug surtace discontinuities, B near surlace discontinuities bob A cand B ater separation,‘Question 43 Magnetic lines of force: \ travel in straight Lines B. form a closed loop © are randomly oriented 1) overlay in highly ferromagnetic materials (Question 44 Which technique « the most sensitive? \ Continuous, B. Residual © bmterrupted } Counter-current tion 48 he unit usually used to denote flux density is the: \ Gauss 8. Henry Farad 1) Ampere (Question 40 The permeability of a material describes: \ the eave with which it can be magnetized. 18 the depth oF the magnetic field in the part the length of time required to demagnetize it ) the ability to retain the magnetic field. Question Coercive force \. deseries the means by which the magnetic particles are suspended in the liquid when using the wet method, 1s describes the magnetizing force used with the continuous method represents the reverse magnetizing force necessary to remove the residual ma na material 1) is nora (erm used in magnetic particle testingsguestion 48 ina magnetic particle test, assuming that all of the following are in the Same relative position in-a small part, which would be the harelest to detect? \ AX surface crack BA near surface crack A scraitelt DOA sean ‘Question 49. When using the wet method, why should a high velocity flow of ‘vet method hath over surfaces following removal of the magnetizing current not be used? \ Hemay wash away’ a fine or weakly held indication 1 Phis as not a problem. ‘ansty splash particles into eyes ) None of the above are correct Question 50. When using the wet continuous method. the flow of suspension veun the hose should be shut off \ ammmediately alter applying the current. 8. immediately betore applying the current. © while the current is flowing 1) 30 seconds hefore applying the current Question 31 What equipment 1s used to determine if a part has been demagnetized” \. A magnet on the part HN field meter \ survey meter ) Careful observation for clinging magneticiguestion 32 \ circular field may be induced into a specimen by which of the dollowine methods? \ Direct induction (head shou 1s Dircet induction (prods) © Central conductor 1 All of the above Juestion 33 Which statement is true when related t0 magnetic lines of fore? A They never cross Hi Phey are most dense at the poles of a magnet They seek the path of least resistance Hy AIPoP the above Question 34 Why are maynetie particles available in different colors? \ bor color contrast with the part surface. enhance the detection of indications. both A and B. ) Different valors are used with dift wathues erent magnetic tux Question 55 Sub-suj discontinuity indications usually appear: \. sharp and distin. 8 sharp and wide wide and fuzzy high and loosely beld (Question 56 Which resiclual field is most difficult to demagnetize? \ Longitudinal & Circular ©. Vector D>. Binouatcguestion 37 Why is it preferable to disassemble parts before magnetic particle Inypection? \ Disassembly makes all surtace areas visible, B. Interfaces will create leakage fields which may confuse the inspection, © This usually easier to handle the disassembled parts. 1) Alot the above: Question 38. Resistance to demagnetization: \ as greater in hard materials than soft materials 4% is greater in soft materials than hard materials. «is the same for both hard and soft materials. Ds momesistent auestion 39, When a magnetic field is induced in a part with prods spaced six sneles apart, the field is \ Solenoid 8 circular © longitudinal D> distorted trapezoidal Question 90) Demaynetization \ may be easy or difficult depending on the type of material 8 is casy for muucrials having a high coercive force ss always mos! difficult in materials retaining a high residual Tiel ) All of the above nswers are correct Question O01 When preparing a bath it is important to have the bath strength wa proper level. as too many particles can result in \. towering the lest amperage B having to increase the magnetizing current masking the indications, 1 none oF the abowe‘Question 62 What method provides greater sensitivity. particularly in sub-surface discontinuities’ locating 4 Conunuows B. Residual © Circular Longitudinal «Question 03 One adlvantage of using fluorescent particles is \ that less equipment is required. 5. the high speed of inspection. 1 the cost 1) that they are more readily attracted. Jiuestion 64 The type of current that is best suited to detect surface cfiscomtinuities is A De BAC pulsating 19. 2 halt wave Question 65 Which of the Jollowing is the most effective method for the jetection of extremely deep-lying defects? \. Dry residual method using DC with surge 8% Wet continuous method using half wave rectified current Wel residual method 1) Dry continuous method using half wave rectified current with(Question 66, The wet fluorescent magnetic particle inspection method is the Same as the standard wet magnetic particle method except for requirements Tor \ black hehe 8. higher current «© adifferent machine PD. type of cur ‘Question 07 The point at which the magnetism in a material cannot be increased even though the magnetizing force continues to increase known as the \ satient pole 8 saturation pomt esidual point remnant point uestion 8 Applying the theory of the "Right Hand Rule,” a longitudinal surtace defect in a found bar is detected by “current passing in 1 direction parallel to the direction of expected detects \ the current direction is in line with the defect 15 the magnetic field is at right angles to the de! ©. itmakes no differen 1) the magnetic field is parallel to the delet (Question 09) When using the wet particles in water suspension, wetting agents nddled to \ prevent Ireezing. 3. prevent corrosion of inspection equipment © insure the proper wetting of part 1) dlecreaye the amount of Water needed(Question 70 When usi netic particle powder. the proper way to apply tte the part is (0: \ toreibly apply at with ar {8 roll the material in the container of powder, © apply it trom the bottom of the part 1D float the particles to inspection surface as gently as possible \uestion 71 TF wet magnetic particle suspension is not uniform, then: \ the strength of an indication may vary. and th interpretation of the indication may be erroneous. 8 the magnetic Hux would not be uniform greater mobility would be required she part cannot he magnetized. ‘Question clectrie current through a copper wire \ creates a magnetic field around the wire B. creates magnetic poles in the wire. © magnetizes the wire 1) does not create « magnetic Field. Juestion 73 Which of the following is most often used for dry magnetic particle inspection”? \ Bull eyele dirvet current Hall wave rectified alternating curr High voltage. low amperage current 1) Direct current from electrolytie cells Question 74 Which of the following will produce circular magnetism? current through a coil the west part ina solenoid Passing current through prods + Yokes \ Passi‘Question 'S Whitt are the three causes of irrelevant indications? \ Lack of fusion, change of section thickness, grinding cracks 18 Change of section thickness, very high amperage. drilled hole ear surface’ © Very high amperage. drilled hole near surtace. blow holes 1). Drilled hole near surface, very high amperage. lack of fusion Question 7 Jo detect lengthwise defects on the inside diameter of hollow parts. sar should vent through it ize with a coil 1 through central conductor : amperage used. Question Which form of on tw control in most parts? \. Longitudinal magnetization 8. Permanent magnetism © Circular magnetization 1) Parallel magnetization uestion, 78 The magnitude of the residual magnetic field in a specimen is lependent on \ the Hid rang (length to diameter). 1s the strength of the applied magnetizis the right hand rule 8 the left hand rule. fore. Juestion 79 Whicit of the following can be magnetized” hen Ho Nickel Cobalt AIL of the of above(Question 80 The best type of magnetic field to use to inspect a tubular product lor surface defects afong its length is a \ tongitudinal tietd 8 Gircular ticle © Swingin: 1 coke magnetization, (Question 81 Ifa crack exists in a circular magnet, the attraction } magnetic particles to the crack is caused by weoeteive force Ba leakage field a doppler effect a high reluctance at the crack. duestion 82 When magnetic material is placed into a coil, the magnetic lines vf flay concentrate themselves in the material and: \ create a longitudinal magnetic field. Is create a circular magnetic field © create a longitudinal-citeular field > have no effect (Question 83 Residual magnetic particle inspection may be used when: \ parts are regular in shape 8 parts are highly retentive parts are highly stressed ) Gyaluating Continuous method indications.Fest Rey 2001.2: 13:13:40:37 fest Quesuion 1, Bile: QFILES\MTLEV ‘Question Number in Question File; 2 Answer C ies Question 2. File: QFILES\MTLEV_I ‘Question Number in Question File: 66 Answer Fest Question 3. File: QFILES\MTLEY_! ‘Question Number in Question File: Answer: B Fest Question 4 File: QFILES\MTLEV 1 Question Number in Question File: Answer: B Jest Question 5. File: QFILES\MTLEV_I (Question Number in Question File: 80 Answer: A fest Question 6. Bile: QFILES\MTLE! Question Number in Question File: 23 Answer D Fest Question 7. Pile: QFILES\MTLE’ Question Number in Question File: 15 Answer € (Question -X.File: QPILES\MTLEV I Question Number in Question File: 78 Answer ( Vest Question 9. 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