Explore topic-wise MCQs in Mechanical Behaviour.

This section includes 33 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 is the Hall-Petch constant for Iron?

A. 0.068
B. 0.11
C. 0.71
D. 1.77
Answer» D. 1.77
Discussion
2.

What is the CRSS value of a copper crystal?

A. 0.5
B. 0.75
C. 5
D. 15
Answer» B. 0.75
Discussion
3.

According to ________ five independent systems are required to maintain the reliability of grain boundaries.

A. Hal-Petch principle
B. Mohr-Coulomb theory
C. Tresca criterion
D. Von Mises criterion
Answer» E.
Discussion
4.

What is the value of Boltzmann’s constant?

A. 8.314
B. 1.38 * 10-23
C. 1.38
D. 8.314 * 10-23
Answer» C. 1.38
Discussion
5.

Pile up of dislocations causes strain hardening.

A. True
B. False
Answer» B. False
Discussion
6.

The slope of stress-strain curve in plastic range is _____

A. Rate of strain hardening
B. Bauschinger effect
C. True strain
D. Resolved shear stress
Answer» B. Bauschinger effect
Discussion
7.

Value of CRSS ____ with increasing impurity contents in a metal crystal.

A. Increases
B. Decreases
C. Remains constant
D. May increase or decrease
Answer» B. Decreases
Discussion
8.

Value of CRSS for HCP crystal _____ with increasing temperature.

A. Increases
B. Decreases
C. Remains constant
D. First decreases then remain unaffected
Answer» E.
Discussion
9.

What is interplanar spacing for {1 1 0} planes in BCC?

A. a/√3
B. a/2√2
C. a/2
D. a/√2
Answer» C. a/2
Discussion
10.

What is interplanar spacing for {1 1 1} planes in BCC?

A. a/2√3
B. a/√2
C. a/2
D. a√3/2
Answer» B. a/√2
Discussion
11.

What is the atomic density on the prismatic plane?

A. 1/a2
B. 2/ac
C. 2/a2
D. 2/√3a2
Answer» C. 2/a2
Discussion
12.

VALUE_OF_CRSS______WITH_INCREASING_IMPURITY_CONTENTS_IN_A_METAL_CRYSTAL.?$

A. Increases
B. Decreases
C. Remains constant
D. May increase or decrease
Answer» B. Decreases
Discussion
13.

WHAT_IS_THE_CRSS_VALUE_OF_A_COPPER_CRYSTAL??$

A. 0.5
B. 0.75
C. 5
D. 15
Answer» B. 0.75
Discussion
14.

Pile up of dislocations causes strain hardening.$

A. True
B. False
Answer» B. False
Discussion
15.

The slope of stress-strain curve in plastic range is _____$

A. Rate of strain hardening
B. Bauschinger effect
C. True strain
D. Resolved shear stress
Answer» B. Bauschinger effect
Discussion
16.

What is the Hall-Petch constant for Iron?$

A. 0.068
B. 0.11
C. 0.71
D. 1.77
Answer» D. 1.77
Discussion
17.

Ideal rolling texture is developed after ____ cold deformation.

A. 20-30%
B. 40-50%
C. 60-70%
D. 80-90%
Answer» E.
Discussion
18.

Recrystallization temperature is defined as the temperature at which cold worked metal recrystallizes completely in 1 hour.

A. True
B. False
Answer» C.
Discussion
19.

Value of CRSS for HCP crystal _____ with increasing temperature?

A. Increases
B. Decreases
C. Remains constant
D. First decreases then remain unaffected
Answer» E.
Discussion
20.

According to ________ five independent systems are required to maintain the reliability of grain boundaries?

A. Hal-Petch principle
B. Mohr-Coulomb theory
C. Tresca criterion
D. Von Mises criterion
Answer» E.
Discussion
21.

What is c/a ratio of titanium?

A. 1.886
B. 1.632
C. 1.587
D. 1.586
Answer» D. 1.586
Discussion
22.

How many slip systems are present in a NaCl crystal?

A. 3
B. 6
C. 12
D. 18
Answer» C. 12
Discussion
23.

What is c/a ratio of magnesium?

A. 1.856
B. 1.624
C. 1.593
D. 1.567
Answer» C. 1.593
Discussion
24.

What is the slip plane for an FCC crystal?

A. {110}
B. {111}
C. {112}
D. {123}
Answer» C. {112}
Discussion
25.

c/a ratio is highest for ______ and least for _____

A. Mg, Co
B. Zr, Ti
C. Cd, Be
D. Hg, Be
Answer» D. Hg, Be
Discussion
26.

At what value of the index of strain rate sensitivity does the material behave superplastically?

A. 0
B. 0.2
C. 0.4 – 0.9
D. 1.0 – 1.2
Answer» D. 1.0 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 1.2
Discussion
27.

{1 1 1} are called _____ planes.

A. Basal
B. Prismatic
C. Octahedral
D. Cube
Answer» E.
Discussion
28.

What is the value of Boltzmann’s constant?$

A. 8.314
B. 1.38 * 10<sup>-23</sup>
C. 1.38
D. 8.314 * 10<sup>-23</sup>
Answer» C. 1.38
Discussion
29.

The process of increasing strength of a material by changing grain size known as __________

A. Grain boundary strengthening
B. Work hardening
C. Solid solution hardening
D. Precipitation hardening
Answer» B. Work hardening
Discussion
30.

What is interplaner spacing for {1 1 1} planes in BCC?

A. a/2‚àö3
B. a/‚àö2
C. a/2
D. a‚àö3/2
Answer» B. a/‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ2
Discussion
31.

What is the SI unit for the stress of a material?

A. N
B. N m
C. N m<sup>-1</sup>
D. N m<sup>-2</sup>
Answer» E.
Discussion
32.

What is atomic density on {1 1 1} plane in fcc?

A. 4/‚àö3a<sup>2</sup>
B. ‚àö2/a<sup>2</sup>
C. 2/a<sup>2</sup>
D. 1/a<sup>2</sup>
Answer» B. ‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ2/a<sup>2</sup>
Discussion
33.

What is atomic density on prismatic plane?

A. 1/a<sup>2</sup>
B. 2/ac
C. 2/a<sup>2</sup>
D. 2/‚àö3a<sup>2</sup>
Answer» C. 2/a<sup>2</sup>
Discussion