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Mechanical Behaviour Testing Materials
Mechanical Behaviour Basic
Quiz 1
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Q.1
What is the order of core energy?
a) 0.5 – 1.5 eV
b) 0.1 – 1.0 eV
c) 2.0 – 4.0 eV
d) 3.0 – 10 eV
Q.2
Which statement is true regarding screw and edge dislocation?
a) Screw and edge dislocation both show non-symmetry
b) Screw and edge dislocation both are equally symmetric
c) Symmetry of edge dislocation is greater than screw dislocation
d) Symmetry of screw dislocation is greater than edge dislocation
Q.3
What is the ratio of elastic strain energy per unit length of an edge dislocation and screw dislocation?
a) 1:1
b) 1:2
c) 2:3
d) 3:2
Q.4
Elastic strain energy of screw dislocation is ____ of that of edge dislocation for unit length?
a) Higher
b) Lesser
c) Equal
d) Half
Q.5
Elastic energy of a dislocation is _____ the Burgers vector.
a) Directly proportional to
b) Proportional to the square of
c) Not dependent on
d) Proportional to the square root of
Q.6
The stability of dislocations ____ with an increase in the Burgers vector.
a) Increases
b) Decreases
c) Remains constant
d) Increases then decrease
Q.7
What is the expression for the force required to bend the dislocation to radius R?
a) Gb/2R
b) Gb/R
c) GbR
d) Gb2/R
Q.8
What is the percentage contribution of elastic strain in the total energy of dislocation?
a) 10%
b) 30%
c) 70%
d) 90%
Q.9
Elastic strain energy _____ with an increase in length.
a) Increases
b) Decreases
c) Remains constant
d) Increases then decrease
Q.10
Line tension (T) is _____
a) ∝ b
b) ∝ b1/2
c) ∝ b2
d) ∝ b3
Q.11
A dislocation can avoid obstacles by a glide.
a) True
b) False
Q.12
As a distance between precipitate particles increases, shear stress to bend dislocation decreases.
a) True
b) False
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