Theory of Machine
Which of the following statement is correct for involute gears?

The pressure angle is constant throughout the teeth engagement.
The variation in centre distance of shafts increases radial force.
A convex flank is always in contact with concave flank.
The interference is inherently absent.

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Theory of Machine
A body in motion will be subjected to Coriolis acceleration when that body is

In plane rotation with variable velocity
Restrained to rotate while sliding over another body
In plane translation with variable velocity
In plane motion which is a resultant of plane translation and rotation

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