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NDT MCQ Unit 1.doc
1. KARPAGAM INSTITUTE OF TECHNOLOGY
COIMBATORE - 105
DEPARTMENT OF MECHANICAL ENGINEERING
Academic Year: 2020 - 2021 (ODD Semester)
MCQ Test UNIT I
Subject Code & Name : ME8097 –Non Destructive Testing and Evaluation
PART A
1
The other terms commonly used for NDT are
a) Non destructive evaluation
b) Non destructive inspection
c) Both a and b
d) None of the above
2
The NDT methods are most commonly used to achieve the following purpose
a) Flaw detection
b) Structure and microstructure characterization
c) Stress- strain and dynamic response
d) All of the above
3
The main objective of NDT is
a) To detect internal or surface flaws
b) To measure the dimension of the specimen
c) To determine material structure or chemistry
d) All of the above
4
__________ may be defined as the ability of material to resist scratching, abrasion,
cutting or penetration.
a) Strength
b) Fatigue strength
c) Hardness
d) None of the above
5
If the BHN value is higher than the material is said to be _______ , If the BHN is
less, then the material is said to be________
a) Harder, Softer
b) Softer, Harder
c) Softer, Softer
d) Harder, Harder
6
The Vickers hardness test is similar to the Brinell test with the ________ based
diamond pyramid being used as the indenter.
a) Circle
2. b) Square
c) Rectangle
d) Triangle
7
VHN =
a) Applied load + surface area of impression
b) Applied load - surface area of impression
c) Applied load x surface area of impression
d) Applied load / surface area of impression
8
The capacity of a metal to withstand blows without fracture is known as ________
a) Yield strength
b) Tensile strength
c) Impact strength
d) None of the above
9
The visual inspection is commonly used
a) To detect surface characteristics such as finish, scratches, cracks or colour.
b) To check stain in transparent materials
c) To inspect corrosion
d) All of the above
10
_________ is a liquid capable of testing the entire surface and being drawn into the
openings.
a) Developer
b) Penetrant
c) Both a and b
d) None of the above
11
___________ is an absorbent material capable of drawing traces of penetrants from
the defects back on to the surface.
a) Developer
b) Penetrant
c) Both a and b
d) None of the above
12
Non ferrous metals can be used for magnetic particle testing
a) True
b) False
13
Thermography is also called as _______
a) Thermal imaging
b) IR Thermography
c) Both a and b
d) None of the above
14
The eddy current testing is also known as
a) Non inductive testing
b) Inductive testing
c) Both a and b
d) None of the above
15
__________ is an electromagnetic NDT Technique.
a) Eddy current testing
b) Magnetic particle testing
3. c) Visual inspection
d) None of the above
16
BHN =
a) Load on the ball / Area of indentation of steel ball
b) Load on the ball + Area of indentation of steel ball
c) Load on the ball -Area of indentation of steel ball
d) Load on the ball xArea of indentation of steel ball
17
The eddy current testing works on the basis of __________
a) Magnetic induction
b) Electron magnetic induction
c) Electromagnetic induction
d) None of the above
18
__________ testing is uses as the sound energy to determine the integrity of the test
objects
a) Radiography
b) Ultrasonic
c) Thermography
d) None of the above
19
The acoustic emission testing is based on the fact that solid materials emit_____
emission
a) Sonic
b) Ultrasonic
c) Both a and b
d) None of the above
20
In radiography testing, _____________ is used to determine the internal soundness
of the metal.
a) X ray
b) Gamma ray
c) Both a and b
d) None of the above
21
NDT test can be performed on part
a) During manufacturing
b) After manufacturing
c) Parts that are already in service
d) All of the above
22
Which of the following is not the destructive testing method?
a)Tensile test
b) Impact test
c) Fatigue test
d) Visual inspection
23
Which of the following is not the Non destructive testing method?
a)Thermography
b) Eddy current testing
c) Fatigue test
d) Visual inspection
4. 24
The NDT Equipment is often portable
a) True
b) False
25
In UTM___________ is used to measure the elongation of the specimen between
the gauge marks when the load is applied
a) Dial gauge
b) Strain gauge
c) Both a and b
d) None of the above
26
A large impression for a given load and indenter indicates a _________ material,
and a small impression indicates a _________ material in the hardness test.
a) Soft, Hard
b) Hard, Soft
c) Soft, Soft
d) Hard, Hard
27
TheBrinell hardness test is performed by pressing a steel ball is known as
________
a) Press ball
b) Impression ball
c) Load ball
d) Indenter
28
The standard indenter is a square pyramid shape with an angle of ________
between opposite faces
a) 136°
b) 146°
c) 156°
d) 126°
29
In Izod test the test specimen is placed in ___________ position in the anvil.
a) Vertical
b) Horizontal
c) Inclined
d)None of the above
30
In Charpy test the test specimen is placed in ___________ position in the anvil.
a) Vertical
b) Horizontal
c) Inclined
d)None of the above
31
Digital detectors and computer technology have made it possible to automate some
visual inspection this is known as
a) Visual Inspection
b) Machine vision inspection
c) Vision Inspection
d) Machine Inspection
32
One of the limitations of Visual Inspection is Eye fatigue
a) True
b) False
5. 33
In visual inspection the test result is depends on skill and knowledge of tester
a) True
b) False
34
_________ method is an effective method of detecting surface defects in metal and
other non porous material surfaces
a) Visual Inspection
b) Liquid Penetrant
c) Magnetic particle testing
d) Eddy current testing
35
In magnetic particle testing after completing inspection we need to do _________
a) Magnetization
b) De Magnetization
c) Both a and b
d) None of the above
PART B
1
Color, density & specific gravity of material falls under which category
a) Physical properties
b) Chemical properties
c) Mechanical properties
d)Electrical properties
2
Corrosion resistance, atomic number & molecular weight of material falls under
which category
a) Physical properties
b) Chemical properties
c) Mechanical properties
d)Electrical properties
3
Strength, elasticity & plasticity of material falls under which category
a) Physical properties
b) Chemical properties
c) Mechanical properties
d)Electrical properties
4
Resistivity, conductivity & dielectric constant of material falls under which
category
a) Physical properties
b) Chemical properties
c) Mechanical properties
d)Electrical properties
5
A tensile test of a material is performed on ____________ materials to determine
to determine tensile properties
a) Brittle
b) Ductile
c) Both a and b
d) None of the above
6
ASTM stands for
a) American society for tooling and materials
6. b) American standard for tooling and materials
c) American standard for testing and materials
d) American society for testing and materials
7
Ultrasonic frequencies are
a) Greater than 20kHz
b) Less than 20kHz
c) Both a and b
d) None of the above
8
The ultrasonic waves are usually generated by the ____________
a) Piezoelectric effect
b) Eddy current effect
c) Electric induction
d) None of the above
9
Ultrasonic testing is harmful to human health
a) True
b) False
10
All most all materials will emit _________ when stressed, deformed or undergoing
structural changes in Acoustic emission testing.
a) High Frequency
b) Low Frequency
c) Moderate Frequency
d) Very low frequency
11
Which of the following types of rays is used in radiography for the inspection of
casting
a) X rays
b) Infrared rays
c) Ultraviolent rays
d) Visible rays
12
Radiography testing is harmful to human health
a) True
b) False
13
In radiography the penetration of rays is much easier with the less density of metal
or casting
a) True
b) False
14
In Penetrant testing of NDT, a liquid is penetrated into the cracks of metal by the
application of pressure
a) True
b) False
15
Equipments used for inspection of inside portion of hollow chamber or narrow
chamber tube is known as
a) Endoscope
b) Telescope
c) Borescope
d) Flexiscope
