Explore topic-wise MCQs in Mechanical Behaviour.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Behaviour knowledge and support exam preparation. Choose a topic below to get started.

1.

What will be strength, if Burgers vector of dislocation is a [x y z]?

A. a2[x2 + y2 + z2]
B. a[x2 + y2 + z2]
C. a[x2 + y2 + z2]1/2
D. a[x2 + y2 + z2]2
Answer» D. a[x2 + y2 + z2]2
Discussion
2.

a/6[1 2 1] + a/6[1 2 1] → _______

A. a/3[1 0 1]
B. a/6[1 0 1]
C. a/3[1 0 1]
D. a/6[1 0 1]
Answer» B. a/6[1 0 1]
Discussion
3.

The reaction a/6[1 2 1] + a/6[2 1 1] → a/2[1 1 0] is ________

A. Favourable energetically
B. Favourable vectorially
C. Favourable vectorially and energetically
D. Not favourable vectorially and energetically
Answer» C. Favourable vectorially and energetically
Discussion
4.

The reaction a/2[1 1 0] → a/6[1 2 1] + a/6[2 1 1] is _______

A. Favourable energetically
B. Favourable vectorially
C. Favourable vectorially and energetically
D. Not favourable vectorially and energetically
Answer» D. Not favourable vectorially and energetically
Discussion
5.

What is the strength of the Burgers vector for dislocations in BCC structure?

A. a/√2
B. a/3
C. a√3/2
D. 3a/√2
Answer» D. 3a/√2
Discussion
6.

THE_REACTION_A/2[1_1_0]_‚ÄÖ√Ñ√∂‚ÀÖ√∫‚Àւ†_A/6[1_2_1]_+_A/6[2_1_1]_IS________?$#

A. Favourable energetically
B. Favourable vectorially
C. Favourable vectorially and energetically
D. Not favourable vectorially and energetically
Answer» D. Not favourable vectorially and energetically
Discussion
7.

a/6[1 2 1] + a/6[1 2 1] ‚Üí _______$#

A. a/3[1 0 1]
B. a/6[1 0 1]
C. a/3[<span style="text-decoration:overline;">1</span> 0 1]
D. a/6[<span style="text-decoration:overline;">1</span> 0 1]
Answer» B. a/6[1 0 1]
Discussion
8.

The_reaction_a/6[1_2_1]_+_a/6[2_1_1]_‚Üí_a/2[1_1_0]_is_________$#

A. Favourable energetically
B. Favourable vectorially
C. Favourable vectorially and energetically
D. Not favourable vectorially and energetically
Answer» C. Favourable vectorially and energetically
Discussion
9.

What_will_be_strength,_if_Burgers_vector_of_dislocation_is_a_[x_y_z]?

A. a<sup>2</sup>[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>]
B. a[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>]
C. a[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>]<sup>1/2</sup>
D. a[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>]<sup>2</sup>
Answer» D. a[x<sup>2</sup> + y<sup>2</sup> + z<sup>2</sup>]<sup>2</sup>
Discussion
10.

What is the strength of the Burgers vector for dislocations in FCC structure?

A. a/‚àö2
B. a‚àö3/2
C. 3a/‚àö2
D. a/2
Answer» B. a‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ3/2
Discussion
11.

Extended screw dislocations can move only on the plane with stacking fault.

A. True
B. False
Answer» B. False
Discussion
12.

SFE of copper increases with the amount of zinc.

A. True
B. False
Answer» C.
Discussion
13.

The pair of partial dislocations along with stacking fault region is called ______ dislocation.

A. Frank partial
B. Lomer-Cottrell
C. Extended
D. Unit
Answer» D. Unit
Discussion
14.

The energy released on dissociation of perfect dislocation into partial dislocations is _____

A. Stacking fault energy
B. Dislocation energy
C. Elastic energy
D. Core energy
Answer» B. Dislocation energy
Discussion
15.

What is not a type of partial dislocation?

A. Frank
B. Shockley
C. Stair rod
D. Unit
Answer» E.
Discussion
16.

A dislocation with its Burgers vector equals one lattice spacing is called ______ dislocation.

A. Unit
B. Partial
C. Imperfect
D. Frank
Answer» B. Partial
Discussion