Explore topic-wise MCQs in Machine Dynamics.

This section includes 10 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.

For a gearing system, the equivalent system is made consisting of three rotors. How many nodes will this new equivalent system will have?

A. 0
B. 1
C. 2
D. 3
Answer» D. 3
Discussion
2.

At a nodal point in the shaft, the frequency of vibration is _________

A. Zero
B. Double than at the ends
C. Minimum
D. Maximum
Answer» B. Double than at the ends
Discussion
3.

When inertia of gearing is taken into consideration, then an additional shaft must be introduced in the equivalent system of the rotors connected by the shaft.

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

In a gearing system, pump speed is one third of the motor. Shaft from motor is 6 cm in diameter and 30cm long, the impellar shaft is 10cm diameter and 60cm long. Mass moment of inertia is 1500 Kg-m2, C = 80Gn/m2. Neglecting the inertia of shaft and gears calculate the frequency of free torsional vibrations in Hz.

A. 4.7
B. 5.7
C. 4.5
D. 5.5
Answer» B. 5.7
Discussion
5.

When inertia of gearing is taken into consideration, then which of the following should be taken into account.

A. Addition of rotor
B. Addition of gear
C. Addition of shaft
D. Addition of pump
Answer» B. Addition of gear
Discussion
6.

A geared system possessed a strain energy if 150kJ, later it was converted into a two-rotor system connected by a shaft. The Strain energy of the equivalent system will be _____

A. 150 kJ
B. less than 150 kJ
C. more than 150 kJ
D. Dependent on the length of the equivalent shaft
Answer» B. less than 150 kJ
Discussion
7.

A geared system possessed a kinetic energy if 200kJ, later it was converted into a two-rotor system connected by a shaft. The kinetic energy of the equivalent system will be_____

A. 200 kJ
B. less than 200 kJ
C. more than 200 kJ
D. Dependent on the length of the equivalent shaft
Answer» B. less than 200 kJ
Discussion
8.

If the pinion has 20 teeth and the gear has 32 teeth, then what is the gear ratio?

A. 5/8
B. 8/5
C. 25/64
D. 64/25
Answer» B. 8/5
Discussion
9.

In a geared system free torsional vibration will take place when the Inertia of gear is taken into consideration.

A. True
B. False
Answer» C.
Discussion
10.

For the free torsional vibration of a geared system which of the following statement is true?

A. Backlash in geared system
B. High inertia of shaft
C. Gearing teeth always in contact
D. High inertia of gear
Answer» D. High inertia of gear
Discussion