Explore topic-wise MCQs in Mechanical Metallurgy.

This section includes 8 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.

The hydrostatic stress influence the crack propagation but not the crack initiation.

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

The Hydrostatic stress __________________ the dislocation pileup in the material.

A. increases
B. decreases
C. does not increase
D. sometimes increases and then decreases
Answer» D. sometimes increases and then decreases
Discussion
3.

The hydrostatic component of stress exerts no __________

A. shear stress
B. tensile stress
C. compressive stress
D. triaxial stress
Answer» B. tensile stress
Discussion
4.

The hydrostatic compressive state of stress __________ the fracture strength of the material.

A. increases
B. decreases
C. does not alter
D. no relationship
Answer» B. decreases
Discussion
5.

In the case of 3-dimension state of stress, if one of the stress values, say, principal stress direction becomes compressive, the fracture stress reduces significantly.

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

Which of the following does not influence the ductile to the brittle transition of a material?

A. Stress state
B. Temperature
C. Strain rate
D. Shape of specimen
Answer» E.
Discussion
7.

The fracture of material occurs when the flow curve _______________

A. is under the fracture curve
B. intersects the fracture curve
C. is parallel to fracture curve
D. is perpendicular to fracture curve
Answer» C. is parallel to fracture curve
Discussion
8.

In which way, the notch decreases the tendency of brittle failure?

A. By producing high local stresses
B. By introducing triaxial tensile state of stress
C. By providing low local strain hardening and cracking
D. By creating a local magnification to the strain rate
Answer» D. By creating a local magnification to the strain rate
Discussion