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.

Torque due to weight of the connecting rod affects the torque due to connecting rod.

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

Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m
Find angular acceleration of connecting rod in rad/s2.

A. 16.782
B. 17.824
C. 15.142
D. 17.161
Answer» C. 15.142
Discussion
3.

From the data given:
Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m ; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m

A. nFind the correcting couple in N-m?
B. 52.7
C. 49.5
D. 59.5
E. 56.5
Answer» D. 59.5
Discussion
4.

Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m
Find the equivalent length L of a simple pendulum swung about an axis.

A. 1.35 m
B. 1.42 m
C. 1.48 m
D. 1.50 m
Answer» C. 1.48 m
Discussion
5.

For a steam engine, the following data is given:
Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m ; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m

A. ncalculate inertia force at =30 degrees from IDC.
B. 19000 N
C. 19064 N
D. 19032 N
E. 20064 N
Answer» C. 19064 N
Discussion
6.

When mass of the reciprocating parts is neglected then the inertia force is _____

A. Maximum
B. Minimum
C. 0
D. Not defined
Answer» D. Not defined
Discussion
7.

Inertia forces on the reciprocating parts acts along the line of stroke.

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

Force which does not act on the connecting rod is ______

A. Weight of connecting rod
B. Inertia force of connecting rod
C. Radial force
D. Coriolis force
Answer» E.
Discussion