Take A Free ASNT NDT MT Level 3 Practice Test – Quiz Course

1.

Introduction to Magnetic Particle Testing
Materials and the Theory of Magnetism

A solenoid is a coiled conductor that:

2.

If the like poles of two magnets are brought into close proximity, the magnets will:

3.

Magnetic lines of force do NOT:

4.

All bar magnets have:

5.

A permanent magnet is a material with magnetic domains that:

6.

Currents Used in the Magnetic Particle Testing Inspection Process

An advantage of direct current from batteries is that:

7.

A disadvantage of alternating current is that it:

8.

An advantage of alternating current is that it:

9.

The source that supplies the most power for magnetizing is:

10.

The source that is commonly obtained from batteries, rectifying alternating current, and generators where in the current flows continuously in one direction at a consistent voltage is:

11.

Field Strength and Distribution

When comparing the magnetic fields surrounding a hollow conductor and a solid conductor of the same size, same diameter and with the same current passing through them, the external magnetic field surrounding a solid conductor is:

12.

The lines of flux or force in a circularly magnetized ferromagnetic bar:

13.

When the current is passed through a part, the magnetic field:

14.

Direct current:

15.

When using a central conductor, placement of the cylinder in the field of the central conductor is critical because:

16.

Magnetic Field Direction and Intensity

Shims are to be used:

17.

A hall effect meter is used to:

18.

Shims are small, thin devices used to:

19.

The pie gage:

20.

An estimate of the direction and intensity of the magnetic field is NOT determined by:

21.

Magnetic Particle Testing Equipment

A portable 220V power supply and a cable wrap provide 3000-ampere turns. To provide the same amount of magnetism, a pre-wound coil with an output of 120V at 6 A would require:

22.

Some yokes have flexible legs and no input or output current control. The flux density in the metal being magnetized with such yokes:

23.

Alternating current/direct current yokes designed for 6 A on the alternating current will require how much current on direct current?

24.

The primary advantage of a permanent magnet yoke is that it:

25.

ASNT NDT Level III personnel should be capable of evaluating magnetic particle test equipment for the capabilities that meet their requirements. The best source for this data about specific test equipment is from:

26.

Magnetic Particle Testing Materials

The viscosity of the suspension oil should be as low as possible to provide mobility to the particles. The suspension should be discarded when:

27.

Fluorescent magnetic particle testing is preferred over visible magnetic particles:

28.

The particle content of magnetic rubber is:

29.

Which of the following is NOT true?

30.

Magnetic particles should have:

31.

Magnetic Particle Testing Practices

A piece of bar stock in the yard of a fabricating shop was inspected for inclusions using clamps and cables. The magnetism in the bar was:

32.

When a magnetic particle testing indication is sharp and very fine, the discontinuity is:

33.

A crack shows the strongest indication of when it is located:

34.

Paint will not adversely affect the detection of a crack if the:

35.

The type of magnetic field that can be induced in parts using permanent magnet yokes is:

36.

Indications and Interpretations

The most effective technique to recognize the presence of fatigue cracks from nonrelevant indications is to:

37.

A seam-welded pipe that had the weld ground flush showed broad, fuzzy indications near the toes of the weld that extended the complete length of the pipe. The probable cause of the indication is:

38.

To determine whether an indication is a crack or a nonrelevant indication:

39.

An indication was noted during a test using direct current magnetization. To determine if the discontinuity is surface or subsurface:

40.

An example of a nonrelevant indication is:

41.

Probability of Detection

To develop reliability and reproducibility for magnetic particle testing:

42.

To ensure the reliability of test results during magnetic particle testing, inspection personnel must:

43.

The best practice to ensure the reproducibility of magnetic particle testing is to:

44.

In magnetic particle testing, the probability of detection varies in order of importance by:

45.

Which statement is correct?

46.

Process and Equipment Controls

The Ketos ring test will provide a complete functional check of the magnetic particle testing process. It is a quick, simple test that should be used:

47.

Which of the following is NOT a means of verifying the correct operation of the magnetic particle testing process?

48.

The alternating current ammeter should be checked:

49.

The magnetizing current ammeter should be calibrated by:

50.

The ammeter should be checked against a calibrated shunt/ammeter:

51.

The controlling document(s) that would be most likely to contain acceptance criteria for discontinuities indicated by a magnetic particle test on a particular casting is a:

52.

Small parts are sometimes fabricated from engineering drawings that contain acceptance criteria in the notes on the face of the drawing. In such cases, the drawing most nearly represents a:

53.

The organization that most probably developed and issued the document referenced in question 2 is:

54.

A document in widespread use by large segments of the industry is titled Recommended Practice for Measurement and Control of Magnetic Particle Materials Used in Magnetic Particle Inspection. This document is most probably a:

55.

On a daily basis, NDT Level I personnel normally use: