Explore topic-wise MCQs in Mechanical Metallurgy Questions and Answers.

This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Metallurgy Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

According to Irwin’s theory of crack resistance, the failure occurs when the rate of change of __________ release rate is equal to the rate of change of _______________ to the crack growth.

A. strain energy, resistance
B. resistance, plastic flow
C. plastic flow, strain energy
D. resistance, plastic flow
Answer» B. resistance, plastic flow
Discussion
2.

The value of J integral in potential energy term is written as J=dUo/da=K2/E’. The value of E’ in case of plane stress is equal to ______ (where v is the poison’s ratio).

A. E
B. Ev
C. E/v
D. E2v
Answer» B. Ev
Discussion
3.

The geometry of the plastic zone in front of a crack tip is shown in the following figure.

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