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Theory of Machine

Theory of Machine
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to

cosecφ
cosφ
sinφ
secφ

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Theory of Machine
In which of the following type of gear train the first gear and the last gear are co-axial.

Reverted gear train
Simple gear train
Compound gear train
None of the listed here

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Theory of Machine
The Coriolis component of acceleration depends upon

None of these
Velocity of slider
Angular velocity of the link
Both (A) and (B)

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Theory of Machine
Governor is used in automobile to

Maximize the fuel economy
Limit the vehicle speed
Maintain constant engine speed
Decrease the variation of speed

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Theory of Machine
The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m). (dx/dt) + (s/m). x = 0. If the roots of this equation are real, then the system will be

Under damped
Critically damped
Over-damped
Without vibrations

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Theory of Machine
The sense of Coriolis component is such that it

Is along the sliding velocity vector
Leads the sliding velocity vector by 180°
Leads the sliding velocity vector by 90°
Lags the sliding velocity vector by 90°

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