Machine Design - Mechanical Engineering Questions and Answers

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The maximum efficiency of a square threaded screw is

$\frac { 1 - sin \varphi } { 1 + sin \varphi }$

$\frac { 1 + sin \varphi }{ 1 - sin \varphi }$

$\frac { 1 - sin \varphi }{ 1 + cos \varphi }$

$\frac { 1 + cos \varphi }{ 1 - sin \varphi }$

Answer : Option A

Explanation :

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