Explore topic-wise MCQs in Machine Dynamics.

This section includes 8 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 radius of gyration increases then the torsional free vibration increases.

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

Calculate the Polar moment of inertia in m4 of a single motor system from the following data:C = 8 GN/m2, L=9m, I = 600 Kg-m2, f=10 Hz

A. 0.00027
B. 0.00032
C. 0.00045
D. 0.00078
Answer» B. 0.00032
Discussion
3.

If the length inertia is decreased to nine times, then what will be the effect on free torsional vibrations of a single motor system?

A. Increases 3 times
B. Increases 9 times
C. Decreases 9 times
D. Decreases 3 times
Answer» B. Increases 9 times
Discussion
4.

Calculate the free torsional vibrations of a single motor system from the following data:C = 8 GN/m2, L=9m, I = 600 Kg-m2, J = 8×104 m4

A. 162,132
B. 172,132
C. 182,132
D. 192,132
Answer» C. 182,132
Discussion
5.

If the mass moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system?

A. Increases 4 times
B. Increases 2 times
C. Decreases 4 times
D. Decreases 2 times
Answer» E.
Discussion
6.

If the polar moment of inertia is increased to four times, then what will be the effect on free torsional vibrations of a single motor system?

A. Increases 4 times
B. Increases 2 times
C. Decreases 4 times
D. Decreases 2 times
Answer» C. Decreases 4 times
Discussion
7.

Free torsional vibrations of a single motor system increases with increase in polar moment of inertia.

A. True
B. False
Answer» C.
Discussion
8.

Which of the following relation is correct regarding free torsional vibrations of a single motor system?

A. Independent of modulus of rigidity
B. Independent of polar moment of inertia
C. Dependent on mass moment of inertia
D. Independent of length of shaft
Answer» D. Independent of length of shaft
Discussion