Explore topic-wise MCQs in Machine Dynamics.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Dynamics knowledge and support exam preparation. Choose a topic below to get started.

1.

A shaft supported in ball bearings is assumed to be a simply supported.

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

If the static deflection is 1.665 10-3m, calculate the critical speed of the shaft in rps.
Centre of disc at 0.25m away from centre of axis of shaft.

A. 8.64
B. 9.64
C. 10.64
D. 12.2
Answer» E.
Discussion
3.

The speed at which the shaft runs so that the additional deflection from the axis of rotation of the shaft becomes infinite, is known as _________

A. Whirling speed
B. Rotational speed
C. Stabilizing speed
D. Reciprocating speed
Answer» B. Rotational speed
Discussion
4.

When the centre of gravity of the rotor lies between the centre line of the shaft and the centre line of the bearing, e is taken positive.

A. True
B. False
Answer» C.
Discussion
5.

Assuming the shaft to be freely supported. Calculate the whirling speed of the shaft : 2 cm diameter and 60 cm long carrying a mass of 1 kg at its mid-point. The density of the shaft material is 40 Mg/m3, and Young s modulus is 200 GN/m2.

A. 2598
B. 2434
C. 2756
D. 2634
Answer» B. 2434
Discussion