Magnetic Particle Inspection Questions

Question 1

True/False
In nondestructive testing, a discontinuity may be defined as an interruption in the normal physical structure or configuration of a part.

Answer 1

True

Question 2

There are two methods in magnetizing a part. [“continuous”, “residual”] is when the magnetizing force is removed the indicating medium is added.

[“residual”, “continuous”] is when the magnetizing force is present the indicating medium is added.

[“residual”, “continuous”] magnetization is used when a smaller defect is needed to be detected.

Answer 2

Answer 1: residual

Answer 2: continuous

Answer 3: continuous

Question 3

In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes…

Answer 3

a large disruption in the magnetic field

Question 4

What materials can you use for magnetic particle inspection?

Answer 4

ferrous based metals

Question 5

Magnetic particle inspection is used primarily to detect

Answer 5

flaws on or near the surface

Question 6

(True/False)
A discontinuity may or may not affect the usefulness of a part.

Answer 6

True

Question 7

True/False
An aircraft part may be demagnetized by subjecting it to ac gradually reduced in strength or from dc that is alternated reversed in direction and gradually reduced in strength.

Answer 7

True

Question 8

In a magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux lines generally causes

Answer 8

a large disruption

Question 9

Under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition?

Answer 9

the flaw is found in a highly stressed area

Question 10

One way a part may be demagnetized after magnetic particle inspection is by

Answer 10

slowly moving the part out of an ac field

Question 11

Which statement is true regarding the use of residual magnetization method?

Answer 11

It may be used with steels that have been heat treated for stressed applications

Question 12

What defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable?

Answer 12

defects perpendicular to the long axis of the part

Question 13

The pattern for an inclusion in your test material during a magnetic particle inspection where a magnetic particle buildup is forming is

Answer 13

parallel lines

Question 14

What method of magnetic particle inspection (pick 2) is used most often to inspect aircraft parts for minute or invisible cracks?

Answer 14

continuous
dc

Question 15

Circular magnetization of a part can be used to detect defects that are

Answer 15

parallel to the long axis of the part

Question 16

What are the two types of indicating mediums used in magnetic particle inspection?

Answer 16

Wet and dry

Question 17

The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has…

Answer 17

high permeability and low retentivity

Question 18

We magnetize a part [ Select ] and [ select ]
in order to see all defects, but a [ Select ]
crack will show on both methods

Answer 18

Answer 1: longitudinally

Answer 2: circularly

Answer 3: 45