Machine Design
For low and moderate speed engines, the cam follower should move with

Cycloidal motion
Uniform velocity
Uniform acceleration and retardation
Simple harmonic motion

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Machine Design
Cold working

Decreases the fatigue strength
Alone has no influence on fatigue strength
Increases the fatigue strength
Has no influence on fatigue strength

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Machine Design
A woodruff key is

A tapered key with head at one end
Capable of tilting in a recess milled out in the shaft
All of these
Fitted in pairs at right angles

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