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

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

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Theory of Machine
Inertia force acts

None of the listed here
Along the direction of acceleration force
Opposite to the direction of acceleration force
Perpendicular to the acceleration force

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