MT Level 1 :: ASNT/NDT Mock Test Practice Quiz | MCQ’s Part-2

Non-Destructive Testing: 60′ Questions for Conduct of Examinations at NDT MT Levels-1

Magnetic Testing Level -1 (MT-1) General Examination Part-2

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MT Level 1 :: NDT Mock Test Practice Quiz MCQ’s Part-2

1.

For direct contact magnetizing methods, the magnetic field is oriented in what direction relative to the current direction?

 
 
 
 

2.

Which of the following would be likely to cause variations in the output of an inspection black light?

 
 
 
 

3.

A material with a wider hysteresis loop has:

 
 
 
 

4.

Applying the theory of the ‘Right-Hand Rule’, a longitudinal surface defect in a round bar is detected by ‘current passing in a direction parallel to the direction of expected defects’ because:

 
 
 
 

6.

When the orientation of likely discontinuities is unknown, what is the minimum number of magnetizing operations required to perform an adequate test?

 
 
 
 

7.

Which technique is the most sensitive?

 
 
 
 

8.

Which of the following produces a circular field?

 
 
 
 

9.

An electric current through a copper wire:

 
 
 
 

10.

Magnetic lines of flux that are parallel to discontinuity produce:

 
 
 
 

11.

A common physiological effect of black light inspection on the inspector is:

 
 
 
 

12.

Which of the following represents ultraviolet light of wavelengths which are potentially injurious (1 Å = 10-10m)

 
 
 
 

13.

A magnetic particle build-up from a discontinuity is strongest when the discontinuity is oriented:

 
 
 
 

14.

What is the magnetic field strength at the surface of a 100 mm diameter bar as compared to that at the surface of a 50 mm diameter bar, each carrying 1000 amps of current?

 
 
 
 

15.

The opposition that a ferromagnetic material shows to the establishment of a magnetic field is called:

 
 
 
 

17.

The correct number of ampere-turns for a given test specimen is determined by:

 
 
 
 

18.

Why are magnetic particles available in different colours?

 
 
 
 

19.

A material with a narrower hysteresis loop has:

 
 
 
 

20.

The temperature above which most soft steels become nonmagnetic is about:

 
 
 
 

21.

An advantage of AC equipment over DC is:

 
 
 
 

22.

Which of the following are ferromagnetic materials?

 
 
 
 

23.

The most common harmful effect of exposure to black light is:

 
 
 
 

24.

A common rule of thumb to use for current required in circular magnetization:

 
 
 
 

25.

Which of the following types of magnetic fields may be present without any external evidence?

 
 
 
 

26.

A residual circular field may be objectionable because:

 
 
 
 

27.

The strongest magnetic field in a coil is at the:

 
 
 
 

28.

The formula, NI = 45000/(L/D

 
 
 
 

29.

Cracks that are caused by a combination of tensile stress and corrosion are called:

 
 
 
 

30.

The best available source of black light for inspection is:

 
 
 
 

31.

Magnetic lines of force enter and leave a magnet at:

 
 
 
 

32.

Most fluorescent dyes used for magnetic particle testing fluoresce what color?

 
 
 
 

33.

Cracks that are caused by alternating stresses above a critical level are called:

 
 
 
 

34.

Which of the following will best define surface cracks?

 
 
 
 

35.

Why is it preferable to disassemble parts before magnetic particle inspection?

 
 
 
 

36.

Opposition to the establishment of a magnetic field is called:

 
 
 
 

37.

Why should one avoid using a high-velocity flow of wet testing media over the test area?

 
 
 
 

38.

The formula, NI = 45000/(L/D

 
 
 
 

39.

A common physiological effect of black light inspection on the inspector is:

 
 
 
 

40.

What rule describes the direction of current flow (+ to –

 
 
 
 

41.

The reverse magnetizing force necessary to remove a residual magnetic field from a test piece after it has been magnetically saturated is called:

 
 
 
 

42.

For direct contact magnetizing methods, the current should be flowing in what direction relative to expected discontinuities?

 
 
 
 

43.

The most common source of DC current for magnetic particle testing is:

 
 
 
 

44.

The ability of a material to remain magnetic after the magnetizing force is removed is called:

 
 
 
 

45.

A disadvantage of fluorescent magnetic particles is:

 
 
 
 

46.

The unit usually used to denote flux density is the:

 
 
 
 

47.

Fields generated in ferromagnetic material with AC current are useful for locating:

 
 
 
 

48.

Dyes that receive light at one wavelength and re-emit light of another wavelength are called:

 
 
 
 

49.

A split-coil would most likely be used with a:

 
 
 
 

50.

The areas on a magnetized part from which the magnetic field is leaving or returning into the part are called:

 
 
 
 

51.

What is the magnetic field strength at the surface of a 25mm diameter bar as compared to that at the surface of a 50mm diameter bar, each carrying 1000 amps of current?

 
 
 
 

52.

The magnetism which remains in a piece of magnetizable material after the magnetizing force has been removed is called the:

 
 
 
 

53.

The ease with which a magnetic field can be established in a test piece is called:

 
 
 
 

54.

A magnetic field that is contained completely within the test piece is called a:

 
 
 
 

55.

Maximum practical prod spacing is about:

 
 
 
 

56.

The area of maximum induced field strength using a yoke is:

 
 
 
 

57.

Fluorescent magnetic particle indications should be inspected under

 
 
 
 

58.

What equipment is used to determine if a part has been demagnetized?

 
 
 
 

59.

A minimum of external poles are produced by what type of magnetization?

 
 
 
 

60.

The area of maximum induced field strength using a yoke is:

 
 
 
 

Question 1 of 60

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