ASME MT-II级考试试题

分一般、专业考试试题{: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Šis 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

磁粉检验Ⅱ级人员一般考试试题

试卷编号：MTLⅡ（G）-2009            批准：

1.表面裂纹引起的缺陷显示，清晰而呈线性。

A．对；                B.错。

2.磁粉探伤可有效地用来检测不锈钢和铬镍合金。

A.对；                B.错。

3.交流磁轭法对两磁极连线上的线性缺陷易以发现。

A.对；                B.错。

4.将触头放在线性缺陷的一直线上，可得到最佳显示。

A.对；                B.错。

5.触头从受检工件上移开之前应断电。

A.对；                B.错。

6.退磁总是用不着的。

A.对；                B.错。

7.线圈法磁化的零件，能使周向缺陷得到最佳显示。

A.对；                B.错。

8.进行磁粉探伤之前，必须去除油、铁屑和灰渣。

A.对；                B.错。

9.磁痕显示的验收标准载于“干粉连续法磁粉检验细则”。

A.对；                B.错。

10.使用交流磁轭法，可检验有一薄层油膜盖着的缺陷

A.对；                B.错。

11.对焊缝，只需检测纵向缺陷。

A.对；                B.错。

12.薄而均匀的一层磁粉比厚厚的一层磁粉要好。

A.对；                B.错。

13.下述材料可作磁粉检验：钢板、铸铁、钢锻件。

A.对；                B.错。

14.磁粉探伤，干法或湿法均可采用。

A.对；                B.错。

15.要作磁粉检验的地方，起码要在2个约成90°的方向上做。

A.对；                B.错。

16.欲要显示微小缺陷，得使用很大很大的磁化电流安培.

A.对；                B.错。

17.极距150mm、电流650A与极距300mm、电流1300A的磁粉探伤，可望得到一样的结果。

A.对；                B.错。

18.磁场与缺陷成90时，缺陷显示最清晰。

A.对；                B.错。

19.极薄的一层隔板对试验灵敏度的降低不会太严重。

A.对；                B.错。

20.交流磁化能发现近表面缺陷。

A.对；                B.错。

21.磁通密度最大总是在：

A.断电后的瞬间；   B.电流最大时；   C.退磁之后；   D.采用直流剩磁法时。

22.下面哪两种是电流不通过管材的磁粉探伤方法？

A.线圈法；         B.中心导体法；   C.触棒法；     D.干粉法;

23.下列哪种材料可以使用磁粉探伤？

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

24.线圈法磁场强度最大的地方是在：

A.外侧边缘；        B.内侧边缘；    C.中心；       D.端部。

25.退磁通常用：

A.直流；            B.交流；        C.半波电流；   D.全波电流。

26.电流流过铜线：

A.磁化这根铜线；B.线内产生磁极；   C.铜线周围产生磁场；D.上述都是。

27.单方向流动的电流叫做：

A.交流；        B.半波电流；       C.直流；         D.涡流电流。

28.磁场强度可由下述算知：

A.磁通密度；    B.铁磁体；         C.磁极；         D.矫顽力。

29.干粉磁粉探伤中最常用的电流是：

A.周期直流电流；B.半波整流交流电流；C.高压、小电流； D.电池直流电流。

30.易以磁化的金属叫做具有：

A.高剩磁性；    B.高导磁率；        C.高矫顽力；    D.上述都是。

31.荧光磁粉检验中，便携式黑光灯中常用的汞蒸气灯泡的功率为多少瓦？

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

32.下列各缺陷中,最容易为磁粉探伤所发现的是(         )

A. 与磁力线方向平行的裂纹                B. 与磁力线方向垂直的裂纹

C. 与磁力线方向45°的裂纹               D. 与磁化电流方向垂直的裂纹

33.下列关于纵向磁化法磁化的叙述中哪种说法是正确的?(       )

A. 线圈两端与中心磁场强度相等     B. 无论工件长度多长,只要一次线圈开路磁化就可以

C. 工件磁化程度与L/D值无关       D. 工件两端有明显的磁极

34.磁粉探伤中,应根据(          ) 选择适当的磁化方法。

A.工件的形状和尺寸          B.材质         

C.缺陷的位置和方向          D.以上都是

35.磁粉探伤中,对磁粉的性能要求是(     )

A.矫顽力高                      B.磁导率高         

C.与磁粉的粒度大小无关          E. 对磁粉的颜色无要求

36.为检测空心零件内壁上的纵长方向缺陷应当(         )

A.零件通电磁化           B.线圈通电磁化        

C.芯棒通电磁化           D.增加电流强度

37.从工件二端采用直接通电磁化时,磁化电流的大小应按什么来选择?(        )

A.工件长度                    B.工件直径           

C.工件长度与直径之比          D.工件长度与直径的乘积

38.铁磁性物质在加热时,铁磁性消失而变为顺磁性的温度叫(        )

A.居里点             B.饱和点            

C.熔点               D.转向点

39铁磁材料是指(     )

A. 磁导率略小于1的材料                  B. 磁导率远远大于1的材料

C. 磁导率接近于1的材料                  D. 磁导率等于1的材料

40在载水磁悬液中添加表面活性剂的主要目的是(         )

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

C. 减小表面张力             D. 乳化作用易于清洗

好资料，学习谢谢

很好 谢谢

{:soso_e179:}

谢谢你的分享，先拿走了

多谢，以后有这样的试题，麻烦多分享下。

好资料
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