Explore topic-wise MCQs in Mechanical Engineering.

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

1.

Consider the two states of stress as shown in configurations I and II in the figure below. From the standpoint of distortion energy (Von-Mises) criterion, which one of the following statements is true?

A. I yields after II
B. II yields after I
C. Both yield simultaneously
D. Nothing can be said about their relative yielding
Answer» D. Nothing can be said about their relative yielding
Discussion
2.

Fatigue strength for non-ferrous materials is usually defined at __________ stress cycles.

A. 104
B. 107
C. 109
D. 1012
Answer» C. 109
Discussion
3.

A 4 meter long solid circular cylindrical shaft transmits 1600 kW at 500 rpm. The endurance limit of the material is 210 MPa and a factor of safety of 3 is to be used with respect to fatigue failure. Use G = 77.5 GPa. The design diameter ‘D’ of the shaft in metre is

A. \(3\sqrt {\frac{{69}}{{4375{\pi^2}}}} \)
B. \(3\sqrt {\frac{{4375}}{{96{\pi^2 }}}} \)
C. \(3\sqrt {\frac{{69}}{{4735{\pi^2 }}}} \)
D. \(3\sqrt {\frac{{192}}{{4375{\pi^2}}}} \)
Answer» E.
Discussion