ASME MT-II級考試試題

分一般、專業考試試題{:soso_e100:}

SPECIFICEXAMINATION PAPER FOR

MT EXAMINER LEVEL II

TEST PAPER CODE：MTLⅡ（S）-2009    APPROAL：

1.A roundindication is one of circular or elliptical shape with a length equal to orless   times its width.  

2. Fornonfluorescent particles, the recommended settling volume is from ～      ml in a 100mlbath sample .

3. When thethickness of material is less than 19 mm,the magnetizing current shall beAtoA per mm of prod spacing.

4. What are the minimum and maximum prod spacing?

a.mm minimum;       b.mm maximum

5. Examination of weld seams shall includeat leastmm of base material oneach side of the weld where possible.

6. What are the unacceptance relevantindications,under DG/ASME1416. procedure for compressional welds any relevantlinear indication,  relevent roundedindications greater than and four or more relevant relevant indicationsin a line separated byor less, edgeto edge.

7. When use surface contrast enhancement, it shall bedemonstrated that indications can be detected throught the enhancement coating.

a. True             b.False

8. All indications found by magnetic particleexamination shall be repaired by grinding.

a. True             b. False

9. Magnetization current shall be applied for a minimumof S and inspection carried outby the continuous method.

a. 0.5 S .           b. 1 S .

c. 1-3 S.           d. greaterthan 3 S.

10. Themagnetizing current used in the coil technique is:

a. 4～5 Ampsmillimetre length.             b. 28～36 Ampsper millimetre diameter.

c. 45.000/L X Turns.                      d. None of the above.

11. When testing by the continual technique, thecurrent is:

    a. Turned on just after the medium has beenapplied.

    b. Shutoff just prior to applying the medium.

    c. Shut off while the medium is being applied.

    d. Shut off after the medium is applied.

12. When it is believed that a defect has been removedby chipping,grinding or flame cutting,the next operation is to:

    a. Repair.

    b. Check, if minimum thickness remains.

    c. Re-examine the area by magnetic particletest.

    d. Sign-off the part.

13. Each DC electromagnetic yoke shall have a liftingforce of at leastkg at themaximum pole spacing that will be used.

    a. 17 kg.          b. 18 kg.

    c. 19 kg.          d. 20 kg.

14. When the thickness of material is greater than 19mm, the amount of amperage used formagnetic particle inspection using the dry prod method??is based on:

   a. Thicknessof part.

   b. Diameterof part.

   c. Distancebetween the prods.

   d. Totallength of part.

15. Normally a satisfactory weld inspection can bemade after the following surface conditioning:

   a. Grind beadflush with the plate.

   b. Fill thebead ripples with the paint.

   c. Wirebrushing,sand or grit blasting.

   d. Acid etch.

16.  For ProdTechn ique, the open circuit voltage of the mangnetizing current source isgreater than     V.

   a. 15V.           b. 20V.

   c.25V.           d. 30V.

17.According to ASME sect .Ⅱ, Art. 7, yoke technique shall only be applied todetect discontinuities that are (      )

    A. near thesurface of the part.                 B.open to the surface of the part.

    C. both Aand B.                             D.depending on the used current.  

18.with nonfluorescent particles, what a minimum lightintensity is required during the examination and evaluation ofindications?  

A. 100  fc (1000Lx) .          B. 50 fc (500Lx)  .

C.30  fc (300Lx) .             D.10 fc (100 Lx) .

19. Direction of magnetization at least to separateexaminations shall be carried out on each area, with prods placed so that theline of flux in one examination are approximately _______ to the lines of fluxin the other.

A. parallel .                   B. perpendicular.

C. 45° .                      D. A and B.

20. A field indicator may be used_______.

A. to demonstrate the presence of an adequate magneticfield.

B. to indicate crack size.

C. for acceptance standard.

D. A, B and C.

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GENERAL EXAMINATION PAPER FOR MT EXAMINER LEVEL II

TEST PAPER CODE：MTLⅡ（G）-2009    APPROAL：

1. Defectindications caused by surface cracks are sharp and clear.

   A. True         B. False

2.Magnetic particle testing must be effectively used on stainless steel andInconel.

   A. True         B. False

3. Whenusing the AC Yoke method,linear defects in line with the contact points arereadily detectable.

   A. True         B. False

4. Theprods are placed in line with a linear defect to obtain maximum indication.

   A. True         B. False

5. Thecurrent should be turned off before removing the prods from the part beingtested.

   A. True         B. False

6.Demagnetizing is never required.

   A. True         B. False

7. A partmagnetized by use of a coil will show a circumferential defect with maximumindication.

   A. True         B. False

8. It isnecessary to remove oil,scale and slag before starting magnetic particletesting.

   A. True         B. False

9.Acceptance standards for magnetic particle indications are cited in DBW QualityControl Procedure for Dry Powder Magnetic Particle Examination of Welds.

   A. True         B. False

10. Anindication may be detected by the AC Yoke Method that is covered with a film ofoil.

   A. True         B. False

11. Weldsrequire testing in the longitudinal direction only.

   A. True         B. False

12. Alight uniform coating of magnetic particles is better than a heavy coating.

   A. True         B. False

13. Thefollowing materials may be tested by magnetic particle inspection:steelplate,cast iron,steel forging.

   A. True         B. False

14.Magnetic particle testing may be done by either wet or dry particle method.

   A. True         B. False

15. Anarea will be tested in at least two directions in magnetic particle inspection.

   A. True         B. False

16.Excessive high amperage is desirable to show minute flaws.

   A. True         B. False

17. Thesame test results can be expected from using prod spacing of 6 inches at 650Amps or using 12 inches at 1300 Amps.

   A. True         B. False

18. Thedefect indication is strongest when the magnetic field is at a 90 degree angleto the defect.

   A. True         B. False

19. Avery shin cadmium plating will not seriously reduce the sensitivity of thetest.

   A. True         B. False

20.Alternating current magnetization will detect sub-surface defects.

   A. True         B. False

21. Theflux density is always greatest:

   A. just after the current is removed.

   B. during the maximum current flow.

   C. after demagnetization.

   D. when using the direct current residualtechnique.

22. Whichof the following is the two method name of magnetizing a tube for MTexamination without passing the eletric current through tube material.

   A. Coil method

   B. Central conductor method

   C. Dry powder method

   D. Prod method

23. Whichmaterial of the following can be examined by MT.

   A. Plastic

   B. Wood

   C. Carbon steel

   D. Graphite

24. Thestrongest magnetic field in a coil is at the:

   A. Outside edge

   B. Inside edge

   C. Center

   D. End

25. Whattype of current is usually used to demagnetize?

   A. Direct current

   B. Alternating current

   C. Half wave current

   D. Full wave current

26. Anelectric current through a copper wire:

   A. Magnetizes the wire

   B. Creates magnetic poles in the wire

   C. Creates magnetic field around the wire

   D. All of the above

27. Anelectric current which flows steadily in one direction is:

   A. Alternating current

   B. Half wave current

   C. Direct current

   D. Eddy current

28. Thestrength of a magnetic field is known as:

   A. Flux density

   B. Ferromagnetic

   C. Magnetic poles

   D. Coercive force

29. Whichof the following is most often used for dry magnetic particle inspection?

   A. Acyclic direct current.

   B. Half wave rectified alternating current.

   C. High voltage,low amperage current.

   D. Direct ccurrent from electrolytic cells.

30. Ametal that is easy to magnetize is said to have:

   A. High retentivity

   B. High permeability

   C. High coercive force

   D. All of the above

31. Whatwattage is most commonly used for mercury vapor bulbs for portable fluorescentmagnetic particle inspection?

   A. 50 Watts.

   B. 75 Watts.

   C. 100 Watts.

   D. 200 Watts.

32.In thefollowing defects, the one that is most easily found by magnetic particleinspection is ？

A. crack paralleling to the direction ofmagnetic force line

B. crack vertical to the direction ofmagnetic force line

C. crack 45°inclined to the direction ofmagnetic force line

D. crack vertical to the direction ofmagnetizing current

33. Inthe following descriptions of longitudinal magnetize magnetizing ,which iscorrect?

A. the strength of magnetic field in bothends of coil equal to that in the center of coil

B. no matter how long the workpiece is, itonly need coil-open-circuit magnetization for one time

C. the extent of magnetization of workpieceisn't relevant to L/D

D. there are obvious magnetic poles in bothends of workpiece   

34. Inmagnetic particle inspection, proper magnetizating method should be selectedaccording to ：

A. shape and size of workpiece  

B. material

C. position and direction of defect  

D. all of above  

35. Inmagnetic particle inspection，the requirement to property of magneticpowder is？

A. high coercivity  

B. high permeability  

C. to be not relevant to size of magneticparticle

D. there is no requirement to color ofmagnetic particle     

36. Inorder to inspect the longitudinal defect in the internal wall of hollow spares,should？

A. spares electrify magnetize

B. coil electrify magnetize

C. rod electrify magnetize

D. increase current strength   

37. Whendirectly electrify magnetizing from both ends workpiece is used, what shouldthe magnitude of magnetizing current be chosen according to?

A. length of workpiece

B. diameter of workpiece

C. the ratio of length to diameter ofworkpiece

D. the product of length and diameter ofworkpiece  

38. Whenthe ferromagnetic material is heated, the temperature when ferromagnetismdisappears and becomes paramagnetism is called.

A. Curie point

B. Saturation point

C. Melt point

D. Turning point   

39.Ferromagnetic material is ？

A. material with permeability slightlysmaller than 1

B. material with permeability far biggerthan 1

C. material with permeability close to 1

D. material with permeability equal to1   

40. Themain aim of adding surface activity agent into the carrying water magneticsuspending liquid is ？

A. increase solution of magnetic powder

B. removing bubble function

C. decrease surface tension

D. creaming function make it easy to clean

磁粉檢驗Ⅱ級人員一般考試試題

試卷編號：MTLⅡ（G）-2009            批準：

1.表面裂紋引起的缺陷顯示，清晰而呈線性。

A．對；                B.錯。

2.磁粉探傷可有效地用來檢測不銹鋼和鉻鎳合金。

A.對；                B.錯。

3.交流磁軛法對兩磁極連線上的線性缺陷易以發現。

A.對；                B.錯。

4.將觸頭放在線性缺陷的一直線上，可得到最佳顯示。

A.對；                B.錯。

5.觸頭從受檢工件上移開之前應斷電。

A.對；                B.錯。

6.退磁總是用不著的。

A.對；                B.錯。

7.線圈法磁化的零件，能使周向缺陷得到最佳顯示。

A.對；                B.錯。

8.進行磁粉探傷之前，必須去除油、鐵屑和灰渣。

A.對；                B.錯。

9.磁痕顯示的驗收標準載于“干粉連續法磁粉檢驗細則”。

A.對；                B.錯。

10.使用交流磁軛法，可檢驗有一薄層油膜蓋著的缺陷

A.對；                B.錯。

11.對焊縫，只需檢測縱向缺陷。

A.對；                B.錯。

12.薄而均勻的一層磁粉比厚厚的一層磁粉要好。

A.對；                B.錯。

13.下述材料可作磁粉檢驗：鋼板、鑄鐵、鋼鍛件。

A.對；                B.錯。

14.磁粉探傷，干法或濕法均可采用。

A.對；                B.錯。

15.要作磁粉檢驗的地方，起碼要在2個約成90°的方向上做。

A.對；                B.錯。

16.欲要顯示微小缺陷，得使用很大很大的磁化電流安培.

A.對；                B.錯。

17.極距150mm、電流650A與極距300mm、電流1300A的磁粉探傷，可望得到一樣的結果。

A.對；                B.錯。

18.磁場與缺陷成90時，缺陷顯示最清晰。

A.對；                B.錯。

19.極薄的一層隔板對試驗靈敏度的降低不會太嚴重。

A.對；                B.錯。

20.交流磁化能發現近表面缺陷。

A.對；                B.錯。

21.磁通密度最大總是在：

A.斷電后的瞬間；   B.電流最大時；   C.退磁之后；   D.采用直流剩磁法時。

22.下面哪兩種是電流不通過管材的磁粉探傷方法？

A.線圈法；         B.中心導體法；   C.觸棒法；     D.干粉法;

23.下列哪種材料可以使用磁粉探傷？

A.塑料；            B.木材；        C.碳鋼；       D.石墨。

24.線圈法磁場強度最大的地方是在：

A.外側邊緣；        B.內側邊緣；    C.中心；       D.端部。

25.退磁通常用：

A.直流；            B.交流；        C.半波電流；   D.全波電流。

26.電流流過銅線：

A.磁化這根銅線；B.線內產生磁極；   C.銅線周圍產生磁場；D.上述都是。

27.單方向流動的電流叫做：

A.交流；        B.半波電流；       C.直流；         D.渦流電流。

28.磁場強度可由下述算知：

A.磁通密度；    B.鐵磁體；         C.磁極；         D.矯頑力。

29.干粉磁粉探傷中最常用的電流是：

A.周期直流電流；B.半波整流交流電流；C.高壓、小電流； D.電池直流電流。

30.易以磁化的金屬叫做具有：

A.高剩磁性；    B.高導磁率；        C.高矯頑力；    D.上述都是。

31.熒光磁粉檢驗中，便攜式黑光燈中常用的汞蒸氣燈泡的功率為多少瓦？

A.50Watts；     B.75Watts；         C.100Watts；    D.200Watt

32.下列各缺陷中,最容易為磁粉探傷所發現的是(         )

A. 與磁力線方向平行的裂紋                B. 與磁力線方向垂直的裂紋

C. 與磁力線方向45°的裂紋               D. 與磁化電流方向垂直的裂紋

33.下列關于縱向磁化法磁化的敘述中哪種說法是正確的?(       )

A. 線圈兩端與中心磁場強度相等     B. 無論工件長度多長,只要一次線圈開路磁化就可以

C. 工件磁化程度與L/D值無關       D. 工件兩端有明顯的磁極

34.磁粉探傷中,應根據(          ) 選擇適當的磁化方法。

A.工件的形狀和尺寸          B.材質         

C.缺陷的位置和方向          D.以上都是

35.磁粉探傷中,對磁粉的性能要求是(     )

A.矯頑力高                      B.磁導率高         

C.與磁粉的粒度大小無關          E. 對磁粉的顏色無要求

36.為檢測空心零件內壁上的縱長方向缺陷應當(         )

A.零件通電磁化           B.線圈通電磁化        

C.芯棒通電磁化           D.增加電流強度

37.從工件二端采用直接通電磁化時,磁化電流的大小應按什么來選擇?(        )

A.工件長度                    B.工件直徑           

C.工件長度與直徑之比          D.工件長度與直徑的乘積

38.鐵磁性物質在加熱時,鐵磁性消失而變為順磁性的溫度叫(        )

A.居里點             B.飽和點            

C.熔點               D.轉向點

39鐵磁材料是指(     )

A. 磁導率略小于1的材料                  B. 磁導率遠遠大于1的材料

C. 磁導率接近于1的材料                  D. 磁導率等于1的材料

40在載水磁懸液中添加表面活性劑的主要目的是(         )

A. 增加磁粉溶解度           B. 消泡作用            

C. 減小表面張力             D. 乳化作用易于清洗

好資料，學習謝謝

很好 謝謝

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