Homework 1 Flashcards
The ease with which a material can conduct lines of magnetic flux is called _____.
permeability
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.
circular
The ____ _____ uses a bundle of optical glass fibers.
fiberoptic borescope
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.
perpendicular
Ac magnetization is best suited for locating _____ faults
surface
Two important characteristics of the testing medium used for magnetic particle inspection are:
[ Select ] [“low”, “high”] permeability
[ Select ] [“high”, “low”] retentivity
Answer 1:
high
Answer 2:
low
Two methods of magnetization for mag particle inspection are _____ and _____ methods.
circular
longitudinal
The two methods of testing by magnetic particle inspection are:
residual
continuous
The magnetism that remains in a material after the magnetizing force is removed is called _____.
residual
Penetrant inspection is based on the principle of _____ ____.
capillary action
Three types of developers that may be used with the liquid penetrant inspection method are:
Dry developer
Wet developer
Nonaqueous developer
The time the penetrant remains on the surface of the part is known as _____ time.
dwell
A _____ ____ uses a CRT for imaging and the image can be recorded for reference.
videoscope
Liquid penetrant inspection may be used to detect discontinuities that are ____ the surface.
open to
There are three types of penetrants used for liquid penetrant inspections:
post-emulsifying
penetrants
solvent-removable
water-soluble penetrants
A _____ is an optional device that allows us to see inside an engine without disassembling it
borescope
Parts which are to be inspected using liquid penetrants _____ be cleaned with an abrasive blast.
should not
When the part is placed in a coil through which the magnetizing current flows, the part is magnetized by the ____ method.
longitudinal
The three types of electrical current that may be used to magnetize a part are:
Alternating Current
Half-Wave Rectified
Direct Current
The magnetic strength of a piece of material is _____ at its surface.
strongest
A fault located with the fluorescent penetrant method will show up as a _____ line.
green
After the part has been inspected using the mag particle inspection method, it must be _____ before returning it to service.
demagnetized
Magnetic particle inspection may be used on ____ metal parts.
ferrous
