ET Level 1 :: Eddy Current Testing MCQ’s Part-2 | Quiz Practice for ASNT/NDT Exam Questions

Non-Destructive Testing: Total 150′ Questions for Conduct of Examinations at NDT ET Level-1. (Quiz Part-1 50′ MCQs, Part-2 50′ MCQs, Part-3 50′ MCQs.).

Eddy Current Testing Level -1 (ET) General Examination Part-2

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ET Level 1 :: NDT Eddy Current Testing MCQ’s Practice Part-2

1.

Some of the products commonly tested using encircling coils are:

 
 
 
 

2.

Using Figure FL-2, what is the vertical component of the leakage flux at the middle of the defect gap of a surface defect?

 
 
 
 

3.

Which type of probe is most commonly sued to inspect solid products such as bar stock?

 
 
 
 

4.

Probes with iron cores tend to:

 
 
 
 

5.

Sliding probes are used to test:

 
 
 
 

6.

Most surface probe coils are wound so that:

 
 
 
 

7.

What is the relationship between electrical conductivity and electrical resistivity?

 
 
 
 

8.

The curve shown in Figure FL-3 is called a:

 
 
 
 

9.

What method of magnetization can be used in flux leakage testing?

 
 
 
 

10.

A Hall effect probe measures:

 
 
 
 

11.

The optimum angle at which the magnetic field must intersect a discontinuity in a test specimen is:

12.

The main purpose of an iron core in a probe is to:

 
 
 
 

13.

Flux leakage inspection can reveal the presence of:

 
 
 
 

14.

Sliding probes usually operate in the:

 
 
 
 

15.

Use of the HPF is not recommended:

 
 
 
 

16.

Flux leakage inspection can normally be applied to:

 
 
 
 

17.

Flux leakage may occur at a surface defect in a ferromagnetic material:

 
 
 
 

18.

When testing for surface flaws, the probe drive frequency used:

 
 
 
 

19.

Inductance is caused by:

 
 
 
 

20.

A probes that can be used to inspect the entire circumference of test objects are:

 
 
 
 

21.

In circular magnetization, the recommended magnetizing current in amperes per linear inch of section thickness is:

 
 
 
 

22.

In the flux leakage examination of tubular products, which of the following discontinuities can be detected?

 
 
 
 

23.

A probe that is often intended to be used in contact with the test surface is called a:

 
 
 
 

24.

A relative motion between the specimen and a_________ is needed in order to pick-up leakage flux.

 
 
 
 

25.

When using the liftoff trace of an impedance plane instrument to distinguish between several materials with high electrical conductivity, it is best to test using a:

 
 
 
 

26.

Which type of probe is most often used to inspect the inside diameter of a machined hole?

 
 
 
 

27.

Which type of probe has a long slender housing to permit inspection in restricted spaces?

 
 
 
 

28.

The depth of penetration is affected by:

 
 
 
 

29.

For a given crack with a given magnetic field, more magnetic lines of force are deflected out of the magnetic path when the:

 
 
 
 

30.

The higher the frequency of the current used to drive the probe, the:

 
 
 
 

31.

In the flux leakage testing of tubular products, the amplitude of the signal received from a discontinuity will depend upon:

 
 
 
 

32.

The ratio B/H is equivalent to a material’s:

 
 
 
 

33.

What material(s) is/are commonly used to shield an eddy current probe?

 
 
 
 

34.

When a probe is brought near a conductive but nonmagnetic material, the coil’s inductive reactance will:

 
 
 
 

35.

Which discontinuity in Figure FL-4 would show the strongest indication?

 
 
 
 

36.

The HPF allows:

 
 
 
 

37.

LPF stands for:

 
 
 
 

38.

Rotational transverse magnetization in a bar or pipe testing used for the detection of:

 
 
 
 

39.

Which of the following are a common eddy current reference standard?

 
 
 
 

40.

HPF stands for:

 
 
 
 

41.

What will be the relative flux leakage level on the surface of the 1 x 7 strand cable (Figure FL-1) caused by an outer wire break compared with that caused by an inner wire break? (Assume that the gap between the ends of the broken wire is the same in both cases.)

 
 
 
 

42.

Wide surface probes are used when scanning:

 
 
 
 

43.

Pencil probes are prone to:

 
 
 
 

44.

Relative permeability is:

 
 
 
 

45.

Filters are adjusted in:

 
 
 
 

46.

Probes for inspection of pipe and tubing are typically of the:

 
 
 
 

47.

When an absolute probe is brought near a ferromagnetic material, the inductive reactance of the coil will:

 
 
 
 

48.

Flux leakage techniques can normally examine for:

 
 
 
 

49.

With rotational flux leakage detection systems, distinctions between similar OD and ID defects are accomplished by:

 
 
 
 

50.

When making a conductivity measurement, the thickness of the material should be at least ___ times the standard depth of penetration.

 
 
 
 

Question 1 of 50

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