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This question belongs to Mechanical Engineering Machine Design

Machine Design

?

The efficiency of a square threaded screw is maximum if the helix angle is equal to
(Where $$\varphi $$ = Angle of friction)

A) $${90^ \circ } - \varphi $$ B) $${45^ \circ } - \varphi $$ C) $${45^ \circ } - \frac{\varphi }{2}$$ D) $${45^ \circ } + \frac{\varphi }{2}$$

Answer & Solution

Correct Answer: Option C

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Question posted by Examveda

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