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

2.50 mm

3.0 mm

2.22 mm

2 mm

2.50 mm

3.0 mm

2.22 mm

2 mm

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Theory of Machine
The maximum fluctuation of speed is the

Difference of minimum fluctuation of speed and the mean speed

Difference of the maximum and minimum speeds

Sum of maximum and minimum speeds

Variations of speed above and below the mean resisting torque line

Difference of minimum fluctuation of speed and the mean speed

Difference of the maximum and minimum speeds

Sum of maximum and minimum speeds

Variations of speed above and below the mean resisting torque line

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Theory of Machine
When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.

None of these

Increases

Decreases

Remains constant

None of these

Increases

Decreases

Remains constant

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Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)

(1/2) μ W R cosecα

(2/3) μ W R cosecα

(3/4) μ W R cosecα

μ W R cosecα

(1/2) μ W R cosecα

(2/3) μ W R cosecα

(3/4) μ W R cosecα

μ W R cosecα

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Theory of Machine
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

Exhaust lap

Steam lap

Lead

None of these

Exhaust lap

Steam lap

Lead

None of these

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Theory of Machine
The unbalanced force due to reciprocating masses

Varies in magnitude but constant in direction

Varies in direction but constant in magnitude

Varies in magnitude and direction both

Constant in magnitude and direction both

Varies in magnitude but constant in direction

Varies in direction but constant in magnitude

Varies in magnitude and direction both

Constant in magnitude and direction both

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Theory of Machine

Theory of Machine The maximum fluctuation of speed is the

Theory of Machine When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.

Theory of Machine The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)

Theory of Machine In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

Theory of Machine The unbalanced force due to reciprocating masses

Theory of Machine
The maximum fluctuation of speed is the

Theory of Machine
When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.

Theory of Machine
The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)

Theory of Machine
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

Theory of Machine
The unbalanced force due to reciprocating masses