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Theory of Machine

Theory of Machine
The critical speed of a shaft depends upon its

Stiffness
Stiffness and eccentricity
Mass and stiffness
Mass

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Theory of Machine
The distance by which the __________ of the D-slide valve overlaps the steam port is called exhaust lap.

None of these
Inner edge
Outer edge
Corners

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Theory of Machine
Kinematic pairs are those which have two elements that

Have surface contact
Permit relative motion
Have line contact
Are held together

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Theory of Machine
An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be

700°K
650°K
600°K
625°K

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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 mm
2.50 mm
3.0 mm
2.22 mm

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Theory of Machine
Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts?

Applied mechanics
Mechanisms
Kinetics
Theory of machines

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