Explore topic-wise MCQs in Machine Dynamics.

This section includes 9 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.

If the mass is of 10 Kg, find the natural frequency in Hz of the free longitudinal vibrations. The displacement is 0.01mm.

A. 44.14
B. 49.85
C. 43.43
D. 46.34
Answer» C. 43.43
Discussion
2.

A cantilever shaft having 50 mm diameter and length of 300 mm has a disc of mass 100 kg at its free end. The Young’s modulus for the shaft material is 200 GN/m2. Calculate the natural longitudinal frequency in Hz.

A. 575
B. 625
C. 525
D. 550
Answer» B. 625
Discussion
3.

Static deflection and frequency are independent of each other.

A. True
B. False
Answer» C.
Discussion
4.

A cantilever shaft has a diameter of 6 cm and the length is 40cm, it has a disc of mass 125 kg at its free end. The Young’s modulus for the shaft material is 250 GN/m². Calculate the static deflection in nm.

A. 0.001
B. 0.083
C. 1.022
D. 0.065
Answer» B. 0.083
Discussion
5.

Which of the following methods will give an incorrect relation of the frequency for free vibration?

A. Equilibrium method
B. Energy method
C. Reyleigh’s method
D. Klein’s method
Answer» E.
Discussion
6.

Find the displacement in mm of the free longitudinal vibrations if the Natural frequency is 20 Hz.

A. 0.1
B. 0.2
C. 0.5
D. 0.6
Answer» E.
Discussion
7.

Find the displacement in mm of the free longitudinal vibrations if the Natural frequency is 15 Hz.

A. 1.1
B. 1.2
C. 1.5
D. 1.6
Answer» B. 1.2
Discussion
8.

If the spring displacement is high then the frequency of the spring increases.

A. True
B. False
Answer» C.
Discussion
9.

Find the natural frequency in Hz of the free longitudinal vibrations if the displacement is 2mm.

A. 11.14
B. 12.38
C. 11.43
D. 11.34
Answer» B. 12.38
Discussion