Non Destructive Testing
Section A
Visual Inspection
1.
A …………………………….. is an optical
device that allows us to see inside an engine without disassembling it.
2.
The …………………………. Bore scope uses
a bundle of optical glass fibers.
3.
A ……………….. ………………….. uses a CRT
for imaging and the image can be recorded for reference.
4.
Liquid penetrant inspection may
be use to detect discontinuities that are …………………………………. (open to or below) the
surface.
5.
Penetrant inspection is based
on the principle of ………………………….. attraction.
6.
A fault located with the
fluorescent penetrant method will show up as a …………… (red or green ) line.
7.
Parts which are to be inspected
using liquid penetrants ………………………… (should or Should not) be cleaned with an
abrasive blast.
8.
The time the penetrant remains
on the part is known as the ……………….. time.
9.
There are three types of
penetrant inspection. They are :
10.
Three types of developers that
may be used with the liquid penetrant inspection method are :
11.
The two methods of testing by
magnetic particle inspection are :
12.
Magnetic particle inspection
may be used on …………………. Metal parts.
13.
The magnetism that remains in a
material after magnetizing force is removed is known as ……………… magnetism.
14.
The ability of a material to
retain magnetism after the magnetizing force is removed is called ……………………
15.
The ease with which a material
can conduct tic lines of magnetic flux is called its ………………
16.
When magnetizing a part for
magnetic particle inspection, it must be magnetized in such a way that the
lines of flux area ……………………… (parallel
or perpendicular) to the suspected fault.
17.
Two methods of magnetizing for
magnetic particle inspection are ………………….. and …………………
18.
When a part is placed between
the heads of the magnetizing machine and
current flows though the specimen, the part is magnetized by the ……………………………….
Method.
19.
When a part is placed in a coil
through which the magnetizing current flows, the part is magnetized by the
……………………….. method.
20.
The magnetic strength of piece
of material is ………………………….. (strongest or weakest) at its surface.
21.
The three types of electrical
current that may be used to magnetize a part for inspection are :
22.
AC magnetization is best suited
foe locating ……………………….. (surface or sub-surface) faults.
23.
Two important characteristics
of the testing medium used for magnetic particle inspection are :
24.
After the part has been
inspecting using the magnetic particle inspection method it must be ……………………..
before returning it to service.
Section B
Electronic Inspection
1.
The four properties of a metal that makes Eddy current
inspection possible are :
2.
What are the two methods of
inspection that utilize Eddy current principles?
3.
Ultrasonic waves that are used
for nondestructive inspection vary in
frequency from ……………………… kilo hertz to ………………………megahertz.
4.
A …………………………. Material is one
that will produce an electrical
potential when it is pressed, bend, or otherwise distorted.
5.
The three of waves that can
introduced into a test specimen when
using ultrasonic inspection are :
6.
The two types of radiation
energy (rays) used for radiographic inspection
are:
7.
The ……………………… (voltage or
current)supplied to the anode of an X ray tube determines the in energy of an
X-ray.
8.
The …………………… (voltage or current) supplied to the
cathode of an X ray tube determines the
in intensity of an X-ray.
9.
Gamma rays are produced by the
disintegration of certain …………………………………..
10.
The factors that determine the
proper exposure for radiographic inspection include, but are not limited to :
11.
The image formed on the photographic
film by either X-rays or Gamma rays is a ………………………. (positive or negative)
representation of the specimen being inspected.
12.
Persons working around X-ray or
Gamma-ray equipment should wear ………………………. Film badges.
Section 11 A
1.
Boroscope
2.
Fiberoptic
3.
Vedio Scope
4.
Open to
5.
Capillary
6.
Green
7.
Should not
8.
Dwell
9.
a, Water b. Post-emulsified c.
Solvent-removable.
10.
A. Dry b. Wet c. Non aqueous
11.
A. Continuous b. residual
12.
Ferrous
13.
Residual
14.
Retentivity
15.
Permeability
16.
Perpendicular
17.
a.
Lonmgitudinal b.circular
18.
Circular
19.
Longitudinal
20.
Strongest
21.
a, alternating
current b, direct current c. Half-wave rectified current
22.
Surface
23.
a. High b.
low
24.
Demagnetized
Section B
1.
a.
Conductivity b.
Permeability c. Mass
d. Presence of faults
2.
a. Absolute
b. comparison
3.
200, 25
4.
Piezoelectric
5.
a. Longitudinal b.
Transverse c. surface
6.
a. X-ray b. Gamma ray
7.
Voltage
8.
Current
9.
Isptopes
10.
a. Material
thickness and density b. Shape and size of the object
c. Type of defect to be detected d. Characteristics of the equipment used
e. Exposure distance f. Exposure angle
g. Film characteristics h. Types of intensifying screen, if used
11.
Negative
12.
Monitoring
