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Prestressed Concrete Structures
1000 Mechanical Behaviour Testing Materials
Quiz 2
Solution
Q.1.
Which of the following materials can be tested by MPI?
a) Ferromagnetic
b) Magnetic
c) Non-magnetic
d) Paramagnetic
Q.2.
As the height of rebound enhances the material’s hardness ___________
a) Remains constant
b) Decreases
c) Increases
d) First Increases and then decreases
Q.3.
What is the Knoop hardness of diamond?
a) 2000 HK
b) 4000 HK
c) 7000 HK
d) 5000 HK
Q.4.
Which of the following scale is used to test softer materials?
a) A
b) B
c) C
d) D
Q.5.
What test force is applied for nonferrous materials in Brinell test?
a) 500 kgf
b) 1000 kgf
c) 3000 kgf
d) 50 kgf
Q.6.
For higher __________ indentation hardness is also higher.
a) Stiffness
b) Ductility
c) Plasticity
d) Maleabitility
Q.7.
__________ is used for measuring the hardness of brittle materials.
a) Shore hardness test
b) Vickers hardness test
c) Brinell hardness test
d) Rockwell hardness test
Q.8.
Which of the following material has the lowest scratch hardness?
a) Gypsum
b) Talc
c) Topaz
d) Diamond
Q.9.
With increase in stacking fault energy, fatigue strength of material __________
a) Remains constant
b) Decreases
c) Increases
d) First Increases and then decreases
Q.10.
Which of the following materials is predominated by thermal failure?
a) Actual
b) Nylon
c) PMMA
d) Polycarbonate
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