Homework 1

Question 1

The ease with which a material can conduct lines of magnetic flux is called _____.

Answer 1

permeability

Question 2

When a part is placed between the heads of the magnetizing machine and current flows through the specimen, the part is magnetized by the ____ method.

Answer 2

circular

Question 3

The ____ _____ uses a bundle of optical glass fibers.

Answer 3

fiberoptic borescope

Question 4

When magnetizing a part for magnetic particle inspection, it must be magnetized in such a way that the lines of flux are _____ to the suspected fault.

Answer 4

perpendicular

Question 5

Ac magnetization is best suited for locating _____ faults

Answer 5

surface

Question 6

Two important characteristics of the testing medium used for magnetic particle inspection are:
[ Select ] [“low”, “high”] permeability
[ Select ] [“high”, “low”] retentivity

Answer 6

Answer 1:
high
Answer 2:
low

Question 7

Two methods of magnetization for mag particle inspection are _____ and _____ methods.

Answer 7

circular
longitudinal

Question 8

The two methods of testing by magnetic particle inspection are:

Answer 8

residual
continuous

Question 9

The magnetism that remains in a material after the magnetizing force is removed is called _____.

Answer 9

residual

Question 10

Penetrant inspection is based on the principle of _____ ____.

Answer 10

capillary action

Question 11

Three types of developers that may be used with the liquid penetrant inspection method are:

Answer 11

Dry developer
Wet developer
Nonaqueous developer

Question 12

The time the penetrant remains on the surface of the part is known as _____ time.

Answer 12

dwell

Question 13

A _____ ____ uses a CRT for imaging and the image can be recorded for reference.

Answer 13

videoscope

Question 14

Liquid penetrant inspection may be used to detect discontinuities that are ____ the surface.

Answer 14

open to

Question 15

There are three types of penetrants used for liquid penetrant inspections:

Answer 15

post-emulsifying
penetrants

solvent-removable

water-soluble penetrants

Question 16

A _____ is an optional device that allows us to see inside an engine without disassembling it

Answer 16

borescope

Question 17

Parts which are to be inspected using liquid penetrants _____ be cleaned with an abrasive blast.

Answer 17

should not

Question 18

When the part is placed in a coil through which the magnetizing current flows, the part is magnetized by the ____ method.

Answer 18

longitudinal

Question 19

The three types of electrical current that may be used to magnetize a part are:

Answer 19

Alternating Current
Half-Wave Rectified
Direct Current

Question 20

The magnetic strength of a piece of material is _____ at its surface.

Answer 20

strongest

Question 21

A fault located with the fluorescent penetrant method will show up as a _____ line.

Answer 21

green

Question 22

After the part has been inspected using the mag particle inspection method, it must be _____ before returning it to service.

Answer 22

demagnetized

Question 23

Magnetic particle inspection may be used on ____ metal parts.

Answer 23

ferrous