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Machine Design

Q1:

Which of the following statement is correct regarding power screws?

A The efficiency of a self locking screw can not be more than 50%

B The efficiency of Acme (trapezoidal) thread is less than that of a square thread

C If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%

D (A) and (B) Only

ANS:D - (A) and (B) Only

Explanation: No answer description is available.



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