Theory of Machine
The Klein's diagram is used when

Crank has uniform angular velocity
Crank has uniform angular acceleration
Crank has nonuniform angular acceleration
Crank has nonuniform angular velocity

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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 variation in centre distance of shafts increases radial force.
The interference is inherently absent.

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