Machine Design
The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.

Remain same
Increases
None of these
Decreases

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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
Fitted in pairs at right angles
All of these

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Machine Design
The contact ratio is the ratio of

Length of arc of contact to the circular pitch
Length of arc of recess to the circular pitch
Length of path of contact to the circular pitch
Length of arc of approach to the circular pitch

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