Explore topic-wise MCQs in Mechanical Behaviour.

This section includes 31 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.

In intergranular fracture, crack travels along grain boundaries.

A. True
B. False
Answer» B. False
Discussion
2.

The crack may be __________ and ____________ depending on strength of grain boundaries.

A. Brittle, ductile
B. Trans granular, intergranular
C. Shear, cleavage
D. Fibrous, granular
Answer» C. Shear, cleavage
Discussion
3.

Which of the followings is not a type of fracture in brittle materials?

A. Bright granular
B. Flat type
C. Neck
D. Chevron patterns
Answer» D. Chevron patterns
Discussion
4.

Brittle fracture is a break in a brittle piece of metal that failed because stress exceeds _____

A. Cohesion
B. Adhesion
C. Yield stress
D. Tensile stress
Answer» B. Adhesion
Discussion
5.

In ____ fracture, crack is unstable and propagates rapidly.

A. Ductile
B. Brittle
C. Shear
D. Tensile
Answer» C. Shear
Discussion
6.

Which of the following materials don’t give brittle fracture?

A. White cast iron
B. Grey cast iron
C. Aluminum
D. Ceramics
Answer» D. Ceramics
Discussion
7.

Surface energy of the specimen increases when the crack lengthens.

A. True
B. False
Answer» B. False
Discussion
8.

The graph for Griffith’s crack is ____________

A. An ellipse
B. A circle
C. A straight line
D. A hyperbola
Answer» B. A circle
Discussion
9.

Which of the following statement is true regarding the toughness of a metal?

A. Energy consumed is less in ductile fracture than brittle fracture
B. Energy consumed is more in ductile fracture than brittle fracture
C. Energy consumed in the brittle fracture is same as the ductile fracture
D. Energy consumed is more in brittle fracture than ductile fracture
Answer» C. Energy consumed in the brittle fracture is same as the ductile fracture
Discussion
10.

Which of the following fracture mechanisms in which the crack propagates more rapidly?

A. Ductile fracture
B. Brittle fracture
C. Fatigue
D. It doesn’t occur during fracture
Answer» C. Fatigue
Discussion
11.

Which of the following is associated with minimum plastic deformation?

A. Ductile fracture
B. Brittle fracture
C. Fatigue
D. It doesn’t occur during fracture
Answer» C. Fatigue
Discussion
12.

WHICH_OF_THE_FOLLOWINGS_IS_NOT_A_TYPE_OF_FRACTURE_IN_BRITTLE_MATERIALS??$

A. Bright granular
B. Flat type
C. Neck
D. Chevron patterns
Answer» D. Chevron patterns
Discussion
13.

THE_GRAPH_FOR_GRIFFITH‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•S_CRACK_IS_____________?$#

A. An ellipse
B. A circle
C. A straight line
D. A hyperbola
Answer» B. A circle
Discussion
14.

BRITTLE_FRACTURE_IS_A_BREAK_IN_A_BRITTLE_PIECE_OF_METAL_THAT_FAILED_BECAUSE_STRESS_EXCEEDS______?$

A. Cohesion
B. Adhesion
C. Yield stress
D. Tensile stress
Answer» B. Adhesion
Discussion
15.

The crack may be __________ and ____________ depending on strength of grain boundaries.$

A. Brittle, ductile
B. Trans granular, intergranular
C. Shear, cleavage
D. Fibrous, granular
Answer» C. Shear, cleavage
Discussion
16.

Surface energy of the specimen increases when the crack lengthens.$

A. True
B. False
Answer» B. False
Discussion
17.

In_intergranular_fracture,_crack_travels_along_grain_boundaries.

A. True
B. False
Answer» B. False
Discussion
18.

Which of the theory is related to brittle fracture?

A. Laundau theory
B. Dirac hole theory
C. Valence bond theory
D. Griffith’s theory
Answer» E.
Discussion
19.

In ____ fracture, crack is unstable and propagates rapidly?

A. Ductile
B. Brittle
C. Shear
D. Tensile
Answer» C. Shear
Discussion
20.

Which of the statement is true?

A. Energy consumed is less in ductile fracture than brittle fracture
B. Energy consumed is more in ductile fracture than brittle fracture
C. Energy consumed is same in brittle fracture than ductile fracture
D. Energy consumed is more in brittle fracture than ductile fracture
Answer» C. Energy consumed is same in brittle fracture than ductile fracture
Discussion
21.

Fracture always occurs above yield stress.

A. True
B. False
Answer» C.
Discussion
22.

What is characteristic of brittle fracture?

A. Prior warning
B. High speed
C. Necking
D. Ductile rupture
Answer» C. Necking
Discussion
23.

The tendency of brittle fracture increases with:

A. Decreasing temperature
B. Increasing temperature
C. Decrease in strain rate
D. It doesn’t depend on temperature or strain rate
Answer» C. Decrease in strain rate
Discussion
24.

When does brittle fracture is noticed?

A. On overloading
B. On sudden loading
C. Uniaxial loading
D. Compressing
Answer» C. Uniaxial loading
Discussion
25.

Cleavage planes are a term associated with ductile fracture.

A. True
B. False
Answer» C.
Discussion
26.

Which of the following materials don’t give brittle fracture?$

A. White cast iron
B. Grey cast iron
C. Aluminum
D. Ceramics
Answer» D. Ceramics
Discussion
27.

Below which point does brittle fracture occur?

A. Ultimate tensile strength
B. Fracture point
C. Elastic limit
D. Yield point
Answer» D. Yield point
Discussion
28.

Which material fails by brittle fracture?

A. White cast iron
B. Steel
C. Aluminum
D. Copper
Answer» B. Steel
Discussion
29.

In which of the following does crack propagation occur?

A. Ductile fracture
B. Brittle fracture
C. Fatigue
D. It doesn’t occur during fracture
Answer» C. Fatigue
Discussion
30.

What is the cleavage plane for HCP materials?

A. {1 2 3 0}
B. {1 0 0 0}
C. {0 0 0 1}
D. {1 0 0}
Answer» D. {1 0 0}
Discussion
31.

What is cleavage plane for FCC materials?

A. {1 1 1}
B. {1 1 0}
C. {1 2 3}
D. {1 0 1}
Answer» B. {1 1 0}
Discussion