2. Residual magnetism may be beneficial as an aid:

3. An interruption in the normal physical structure or configuration of a part which produces an MT indication is called:

4.Comparing parts that have been circularly magnetized and those which have been longitudinally magnetized, which retains the most objectionable residual field if not demagnetized?

5. What type of magnetization uses the formula: Ampere-turns = 45000 /(L/D)

6. Why are large soft contact areas such as lead or copper braid used for surfaces or headstocks?

7. A rough forging that has received no further processing is magnetic particle tested. An indication is observed to run in every direction. It appears to extend deeply into the part and perpendicular to the surface. It is very sharp. What is the probable identity of the indication?

8. Having located all the discontinuities on a part,

9. A gear with case-hardened ground teeth and hub ends is MT tested. Individual indications are detected on five of the teeth and on the one end surface of the hub. Although the indications are very sharp and distinct, they do not break over the edges of the part. What is the probable identity of the indication?

10. If an overall pattern (sometimes circular lines) appears on the test surfaces, how should the inspector reprocess the test piece?

11. A prime consideration when selecting a powder to be used as a magnetic particle medium is selocted a powder that:

12. When testing for fine shallow surface cracks, the preferred MT method should be:

13. Which of the following is an advantage of dry method over wet method?

14. When testing a bar with an L/D ratio of four in a ten-turn coil, the required would be:

15. Internal splines and holes drilled parallel to or near surfaces will cause:

16. Some limitations of coil magnetization techniques are that:

17, The term used to refer to the total opposition flow of current represented by the combined effect of resistance, inductance, and capacitance of a circuit is:

18. Which of the following casting defects is cause by non-uniform cooling resulting in stresses, which rupture the surface of the metal?

19. A coil shot required to be performed after a headshot using the wet continuous method. In order to properly conduct the coil shot is necessary to:

20. When adding concentrate to any wet magnetic particle suspension liquid it is common practice:

21. A desirable property of magnetic particles used for the inspection medium for either the dry or wet method is that they:

22. Which of the following can cause non-relevant magnetic particle indications?

23. External poles which are too strong to permit good inspection of a likely to result when using

24. A rough forging discontinuity has the following characteristic: it can ocour on the surface or internally: it is associated with processing at low temperature: it is often caused by excessive working: it creates straight or irregular cavities varying in size How would it be identified or classified?

25. Discontinuities in plate, sheet, or strip caused by pipe, inclusions, or blowholes in the original ingot which after rolling are usually flat and parallel to the outside surface are called:

26. Forging laps occur in what relation to the axial direction of a part?

27. The accumulation of particles at a site on the part surface, collected at and held to the site by the magnetic leakage field, is called:

28. Half wave rectified AC (HWDC) is used for detected of

29. Which of the following is not an acceptable technique for removing a thin film of oil or grease prior to magnetic particle testing?

30. Where particles are attracted to site on the surface of a part by a magnetic leakage field which is due to a condition such as a crack, lap, or other condition not acceptable to the applicable standards for the part, then we have:

31. Which of the following is a commonly used technique for preserving MT powder patterns?

32. Which one of the following is not a discontinuity common to rolled products?

33. Which one of the following is not a discontinuity common to forged products?

34. Which one of the following is a defect commonly associated with the welding process?

35. Which of these cracks may appear as an irregular, checked, or scattered pattern of fine lines usually caused by local overheating?

36. Of the following discontinuity categories, which one is considered most detrimental to the service life of an item?

37. If a copper conductor is placed through a ferrous cylinder and a current is passed through the conductor, then the magnetic field (flux density) in the cylinder will be:

38. The length of a part being magnetized by passing an electric current from one end to the other:

39. If one-inch and two-inch diameter bars were magnetized by passing the same current through them, the magnetic fields would be:

40. IF a current of same amperage is passed through two conductors of the same dimensions, one of which is magnetic and one of which is nonmagnetie field surrounding the conductors will:

41. The most effective MT method for inspection of a large casting is using.

42. The most common failure mechanism associated with a sharp fillets, notches, undercuts, and seams is

43. When it is believed that a defect has removed by chipping, grinding, or flame cutting, the next operation is to:

44. When the most complete demagnetization available is desire and demagnetization is to be accomplished by placing the part in a coil energized with AC of progressively decreasing amperage, the following orientation of the long axis of the part is most desirable:

45. Non-relevant indications due to residual local poles interfere with magnetic particle testing. For a successful examination one should:

46. Cold working indications will no reappear if the part is:

47. The unit of measure of one line of flux per square centimeter of area is one:

48. The ability of matter to attract other matter to itself is a phenomenon associated with:

49. Materials which are strongly attracted to a magnet are called:

50. Materials which are weakly attracted to a magnet are called:

51. Materials which are repelled magnetically are called

52. The end of a magnet at which the lines of flux are thought of as entering the bar is:

53. A general rule to use for determining the defectability of surface discontinuities by magnetic particle inspection is that:

54. The general term used to refer to a break in the metallic continuity of the part being tested is:

55. The pattern of iron powder sprinkled on a paper placed over a bar magnet is called a:

56. The lines of force that form a path around a crack in a ring magnet are called:

57. Since the magnetic lines of force within a bar magnet run the length of the bar, it is said to be:

58. Lines of flux are thought to leave a magnet at:

59. A break in the magnetic uniformity if a part that is called a magnetic discontinuity is related to a sudden change in:

60. In order to detect defects in different directions in a material by magnetic particle inspection, it is best to use:

61. The parts are blanks cut from rolled iron bar stock. They have been rough machined. Inspection by continuous method, using a circular shot, reveals well-defined but broken lines running parallel with the axis on some of the pieces and no indications on others. The broken lines range in length from ¼ to 1 inch. These indications are indicative of:

62. A large forging is repaired by welding Magnetic particle inspection of the repair weld reveals an irregular indication running parallel with the weld passes. It is located near the center of the bead and starts and ends by turning off slightly from the axial direction. This indication is indicative of:

63. What wattage is most commonly used for mercury vapor bulbs for portable fluorescent magnetic particle inspection?

64. An example of non relevant indication that would be classed as a magnetic irregularity rather than an actual discontinuity could be caused by:

65. The detection of deep-lying defects in heavy weldments (1/4 to 2 inches below surface) is:

66. In magnetic particle inspection, it is best to:

67. An indication, in magnetic particle inspection, that is held mechanically and not magnetically, is known as

68. Optimum magnetic particle inspection of a 2 inch inside diameter gear containing a keyway would require:

69. Which of the following surface or near surface types of discontinuities in ferrous material is least detectable by dry magnetic particle method?

70. The field in a section of pipe being magnetized by means of a central conductor is stronger at:

71. Fine surface defects such as fatigue cracks on smoothly machined parts which have been in service are best detected with magnetic particle inspection by use of:

72. An example of non-relevant indication that would be classified as a magnetic normally rather than an actual discontinuity is a:

73. Porosity, cold shuts, hot tears would all be examples of defects due to which of the following processes?

74. In order to be able to most effectively locate or detect a defect in a large casting, disregarding economic aspects,

75. The nearer a discontinuity is to the surface,

76. It is easier to remove surface defects from raw casting than from machined parts because:

77. The strength of the magnetic field within a coil is determined by:

78. The magnetizing method that can be used most universally is that of:

79. If an overall pattern (sometimes circular lines) appears on the test surface, one should:

80. External fields that are too strong to permit good examination of a part are usually created by: