A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of

Theory of Machine
A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of

2.22 mm

3.0 mm

2 mm

2.50 mm

2.22 mm

3.0 mm

2 mm

2.50 mm

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Theory of Machine
Whirling speed of the shaft is the speed at which

Shaft tends to vibrate in longitudinal direction

Combination of transverse and longitudinal vibration occurs

Shaft tends to vibrate vigorously in transverse direction

Torsional vibrations occur

Shaft tends to vibrate in longitudinal direction

Combination of transverse and longitudinal vibration occurs

Shaft tends to vibrate vigorously in transverse direction

Torsional vibrations occur

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Theory of Machine
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by

2ECS

2E²CS

EC S/2

2ECS²

2ECS

2E²CS

EC S/2

2ECS²

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Theory of Machine
Which of the following governor is used to drive a gramophone?

Pickering governor

Watt governor

Porter governor

Hartnell governor

Pickering governor

Watt governor

Porter governor

Hartnell governor

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Theory of Machine
Angle of action of cam is defined as the angle

Moved by the cam from beginning of ascent to the termination of descent

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Of rotation of the cam for a definite displacement of the follower

Through which the cam rotates during the period in which the follower remains in the highest position

Moved by the cam from beginning of ascent to the termination of descent

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Of rotation of the cam for a definite displacement of the follower

Through which the cam rotates during the period in which the follower remains in the highest position

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Theory of Machine
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

M/(m + M)

m/(m + M)

(m + M)/M

(m + M)/m

M/(m + M)

m/(m + M)

(m + M)/M

(m + M)/m

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Theory of Machine

Theory of Machine Whirling speed of the shaft is the speed at which

Theory of Machine With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by

Theory of Machine Which of the following governor is used to drive a gramophone?

Theory of Machine Angle of action of cam is defined as the angle

Theory of Machine The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)

Theory of Machine
Whirling speed of the shaft is the speed at which

Theory of Machine
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by

Theory of Machine
Which of the following governor is used to drive a gramophone?

Theory of Machine
Angle of action of cam is defined as the angle

Theory of Machine
The ratio of height of Porter governor (when length of arms and links are equal) to the height of Watt's governor is (where m = Mass of the ball, and M = Mass on the sleeve)