Dynamics of Machinery (3151911) MCQs

MCQs of Turning moment diagrams and flywheel

Showing 31 to 40 out of 74 Questions
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31.

The flywheel is accelerated when

(a)

driving torque = load torque
(b)

driving torque < load torque
(c)

driving torque > load torque
(d)

any of the mentioned
Answer:

Option (c)

32.

Turning moment diagram is a graph between

(a)

torque and crank angle
(b)

torque and crank radius
(c)

force and crank radius
(d)

none of the mention
Answer:

Option (a)

33.

The turning moment is maximum when the crank angle is 90 degrees.

(a)

True
(b)

False
Answer:

Option (a)

34.

When engine torque is more than mean resisting torque, then the flywheel _______.

(a)

has uniform velocity
(b)

has 0 velocity
(c)

has acceleration
(d)

has retardation
Answer:

Option (c)

35.

When engine torque is less than mean resisting torque, then the flywheel _______.

(a)

has uniform velocity
(b)

has 0 velocity
(c)

has acceleration
(d)

has retardation
Answer:

Option (d)

36.

The area of the turning moment diagram represents _______.

(a)

work done
(b)

work done per revolution
(c)

power generated
(d)

power generated per revolution
Answer:

Option (b)

37.

In actual practice, the engine is assumed to work against the mean resisting torque.

(a)

True
(b)

False
Answer:

Option (a)

38.

Mean resisting torque in turning moment diagram is given by

(a)

work done per cycle/angle turned during the cycle
(b)

work done per cycle x angle turned during the cycle
(c)

work done per revolution /angle turned during the cycle
(d)

work done per revolution x angle turned during the cycle
Answer:

Option (a)

39.

The 4-stroke engine has one power stroke per 2 revolutions hence turning moment diagram is uniform.

(a)

True
(b)

False
Answer:

Option (b)

40.

Work produced by the 4-stroke engine is less because _______.

(a)

one power stroke per 2 revolutions
(b)

one power stroke per revolution
(c)

one power stroke per 4 revolution
(d)

four power stroke per revolution
Answer:

Option (a)

Showing 31 to 40 out of 74 Questions
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