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Theory of Machine

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

Mass and stiffness
Stiffness and eccentricity
Mass
Stiffness

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Theory of Machine
A spring controlled governor is found unstable. It can be made stable by

Decreasing the spring stiffness
Increasing the ball mass
Decreasing the ball mass
Increasing the spring stiffness

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Theory of Machine
V-belts are usually used for

Long drives
None of these
Long and short drives
Short drives

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Theory of Machine
If two moving elements have surface contact in motion, such pair is known as

Rolling pair
Higher pair
Sliding pair
Surface pair

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Theory of Machine
When a slider moves on a fixed link having curved surface, their instantaneous centre lies

At the centre of curvature
At the centre of circle
At the pin joint
On their point of contact

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Theory of Machine
In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

Equal to sum of other two
There is no such relationship
Less than sum of other two
Greater than sum of other two

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