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Mechanical Behaviour Testing Materials
Testing Materials Exam
Quiz 1
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Q.1
Which of the following is a dynamic hardness test?
a) Brinell
b) Poldi
c) Knoop
d) Vickers
Q.2
What is the standard height of impact for shore test?
a) 125 mm
b) 250 mm
c) 500 mm
d) 750 mm
Q.3
What is a weight of hammer in shore test?
a) 2.0 gm
b) 2.3 gm
c) 2.4 gm
d) 3.0 gm
Q.4
As the height of rebound enhances the material’s hardness ___________
a) Increases
b) Decreases
c) First Increases and then decreases
d) Remains constant
Q.5
Specimen less than 1 kg must be clamped because of ________
a) Elastic recovery
b) Penetration
c) Inertial effect
d) Personal error
Q.6
What is a disadvantage of shore test?
a) Very slow
b) Deep indentation
c) Clamping problem
d) Heavy machinery
Q.7
Which test should be preferred for finished lathe machine bed?
a) Brinell
b) Poldi
c) Shore
d) Rockwell
Q.8
What is the height of Poldi apparatus?
a) 10 mm
b) 100 mm
c) 150 mm
d) 250 mm
Q.9
What is the disadvantage of Poldi hardness test?
a) Expensive
b) Not portable
c) Not accurate
d) Can’t perform on heavy machinery
Q.10
Poldi hardness test gives a value of ________ also along with dynamic hardness.
a) Yield strength
b) Tensile strength
c) Toughness
d) Young’s modulus
Q.11
Tensile strength is given in tonnes per square inch in Poldi test.
a) True
b) False
Q.12
Hardness of heavy components can’t be measured by Poldi test.
a) True
b) False
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