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Theory of Machine

Theory of Machine
In order to double the period of a simple pendulum, the length of the string should be

Doubled
Halved
Quadrupled
None of these

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Theory of Machine
A spring controlled governor is said to be unstable when the controlling force

Decreases as the radius of rotation increases
Increases as the radius of rotation decreases
Remains constant for all radii of rotation
Increases as the radius of rotation increases

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Theory of Machine
Davis steering gear consists of

Sliding pairs
Turning pairs
Rolling pairs
Higher pairs

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Theory of Machine
Which of the following is an inversion of a double slider crank chain?

Oldham's coupling
Scotch yoke mechanism
All of these
Elliptical trammel

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Theory of Machine
Flexible coupling is used because

It prevents shock transmission and eliminates stress reversals
It is easy to disassemble
It transmits shocks gradually
It is easy to engage and disengage

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Theory of Machine
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to

Minimize the effect of secondary forces
Have perfect balancing
Minimize the effect of primary forces
To start the locomotive quickly

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