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Theory of Machine

Theory of Machine
Cam size depends upon

Base circle
Prime circle
Pitch circle
Outer circle

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

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Theory of Machine
In under damped vibrating system, the amplitude of vibration

Increases linearly with time
Increases exponentially with time
Decreases linearly with time
Decreases exponentially with time

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Theory of Machine
The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration.

Different
Same
Unpredictable
None of these

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Theory of Machine
To obviate axial thrust, following gear drive is used

Mutter gears
Single helical gear in which one of the teeth of helix angle a is more
Double helical gears having opposite teeth
Double helical gears having identical teeth

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Theory of Machine
An involute pinion and gear are in mesh. If both have the same size of addendum, then there will be an interference between the

Tip of the pinion and flank of gear
Tip of the gear tooth and flank of pinion
Flanks of both gear and pinion
Tip of both gear and pinion

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