Explore topic-wise MCQs in Mechanical Metallurgy.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy knowledge and support exam preparation. Choose a topic below to get started.

1.

The Burgers vector for Body-centred cubic lattice will be equal to ________

A. a<sub>o</sub>[100]
B. a<sub>o</sub>[110]
C. a<sub>o</sub>/2[111]
D. a<sub>o</sub>/2[110]
Answer» D. a<sub>o</sub>/2[110]
Discussion
2.

The extended dislocation formed on the basal plane of Hexagonal closed packed structure are sessile dislocation.

A. True
B. False
Answer» C.
Discussion
3.

Burger vector for Hexagonal closed packed structure is ______

A. (a<sub>0</sub>/3)[1120]
B. (a<sub>0</sub>)[1120]
C. (a<sub>0</sub>/3)[1000]
D. (a<sub>0</sub>)[1000]
Answer» B. (a<sub>0</sub>)[1120]
Discussion
4.

The basal plane and chief slip direction for Hexagonal closed packed structure is _________

A. (0 0 0 1) &amp; &lt;1 1 2 0&gt;
B. (0 2 1 1) &amp; &lt;1 1 -2 0&gt;
C. (0 0 0 1) &amp; &lt;1 0 0 0&gt;
D. (1 1 2 2) &amp; &lt;1 1 -2 1&gt;
Answer» B. (0 2 1 1) &amp; &lt;1 1 -2 0&gt;
Discussion
5.

Shockley dislocation is which type of dislocation?

A. Sessile
B. Glissile
C. Full dislocation
D. Mixed dislocation
Answer» C. Full dislocation
Discussion
6.

The burgers vector for frank partial dislocation is equal to ___________ (Lattice parameter is ao)

A. a<sub>o</sub>[100]
B. a<sub>o</sub>/2[110]
C. a<sub>o</sub>/3[111]
D. a<sub>o</sub>/3[110]
Answer» D. a<sub>o</sub>/3[110]
Discussion
7.

The higher the width of the stacking fault _________ will be the stacking-fault energy. Higher the stacking fault energy __________ will be the cross slip.

A. higher, easier
B. lower, easier
C. lower, difficult
D. higher, difficult
Answer» C. lower, difficult
Discussion
8.

The formation of Shockley partial dislocation in the material will generate a region of stacking fault.

A. True
B. False
Answer» B. False
Discussion
9.

The slip in FCC crystal occurs in the (111) plane in {110} direction, but generally it is not energetically favourable, so it slips into two partial dislocations. The correct partial dislocation is represented by which of the following equation?

A. a<sub>o</sub>/2[1 1 0] a<sub>o</sub>/3[-1 2 1]+a<sub>o</sub>/2[112]
B. a<sub>o</sub>/2[1 1 0] a<sub>o</sub>/6[-1 2 1]+a<sub>o</sub>/6[112]
C. a<sub>o</sub>/2[1 1 0] a<sub>o</sub>/6[2 -1 -1]+a<sub>o</sub>/2[11-2]
D. a<sub>o</sub>[1 1 0] a<sub>o</sub>/3[-1 2 1]+a<sub>o</sub>/2[112]
Answer» D. a<sub>o</sub>[1 1 0] a<sub>o</sub>/3[-1 2 1]+a<sub>o</sub>/2[112]
Discussion
10.

The burger vector for Face-centred cubic material is _______; Where ao is the lattice parameter.

A. a<sub>o</sub>/2[110]
B. a<sub>o</sub>/2[111]
C. a<sub>o</sub>[110]
D. a<sub>o</sub>[100]
Answer» B. a<sub>o</sub>/2[111]
Discussion