1.

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

2.

Use of the HPF is not recommended:

3.

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

4.

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

5.

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

6.

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

7.

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

8.

The HPF allows:

9.

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

10.

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

11.

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

12.

What is the relationship between electrical conductivity and electrical resistivity?

13.

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.)

14.

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

15.

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

16.

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

17.

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

18.

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

19.

Flux leakage techniques can normally examine for:

20.

Some of the products commonly tested using encircling coils are:

21.

LPF stands for:

22.

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

23.

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

24.

Filters are adjusted in:

25.

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

26.

A Hall effect probe measures:

27.

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

28.

HPF stands for:

29.

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

30.

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

31.

Relative permeability is:

32.

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

33.

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

34.

Flux leakage inspection can reveal the presence of:

35.

Inductance is caused by:

36.

Pencil probes are prone to:

37.

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

38.

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

39.

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

40.

Sliding probes are used to test:

41.

Wide surface probes are used when scanning:

42.

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

43.

Probes with iron cores tend to:

44.

Flux leakage inspection can normally be applied to:

45.

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

46.

Most surface probe coils are wound so that:

47.

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

48.

Sliding probes usually operate in the:

49.

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:

50.

The depth of penetration is affected by: