Explore topic-wise MCQs in Mechanical Metallurgy.

This section includes 9 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.

In the case of plane strain, the relationship between the fracture toughness and crack extension force is given as _______ (where K is the fracture toughness, is the crack extension force, is the poison s ratio, and E is the young s modulus).

A. K= E
B. K<sup>2</sup>= E/(1- <sup>2</sup>)
C. K=( E)/
D. K= /E
Answer» C. K=( E)/
Discussion
2.

In the case of plane stress, the relationship between the fracture toughness and crack extension force is given as _______ (where K is the fracture toughness, is the crack extension force, and E is the young s modulus).

A. K= E
B. K<sup>2</sup>= E
C. K=( E)<sup>2</sup>
D. K= /E
Answer» C. K=( E)<sup>2</sup>
Discussion
3.

The plane-strain value of critical stress intensity factor KIc is independent of the specimen thickness and describes the fracture toughness of the durable material. Here, in the KIc the I represents _____

A. mode of fracture
B. number of stress state
C. number of strain state
D. the magnitude of fracture toughness
Answer» B. number of stress state
Discussion
4.

In the Crack Opening Mode-I, the extreme case is the thick plate which shows the condition of ____________

A. plane stress
B. plane strain
C. uniaxial stress
D. uniaxial strain
Answer» C. uniaxial stress
Discussion
5.

In the Crack opening Mode-I, the extreme case is the thin plate which shows the condition of ____________

A. plane stress
B. plane strain
C. uniaxial stress
D. uniaxial strain
Answer» B. plane strain
Discussion
6.

In determining the fracture toughness, the Mode-III is defined as the _____________

A. crack opening mode
B. forward shear mode
C. parallel shear mode
D. perpendicular shear mode
Answer» D. perpendicular shear mode
Discussion
7.

In determining the fracture toughness, the Mode-II is defined as the _____________

A. crack opening mode
B. forward shear mode
C. parallel shear mode
D. perpendicular shear mode
Answer» C. parallel shear mode
Discussion
8.

In determining the fracture toughness, the Mode-I is defined as _____________

A. crack opening mode
B. forward shear mode
C. parallel shear mode
D. perpendicular shear mode
Answer» B. forward shear mode
Discussion
9.

The value of the geometric parameter for a plate of width w loaded in tension with the centrally loaded crack of the length 2a __________

A. [w/2 tan( a/w)]<sup>1/2</sup>
B. [wtan( a/w)]<sup>1/2</sup>
C. [w/2 tan( a/w)]
D. [w/2 ]
Answer» B. [wtan( a/w)]<sup>1/2</sup>
Discussion