Question:-
The maximum efficiency of self locking screw is
Option (A)
50%
Option (B)
70%
Option(C)
75%
Option(D)
80%
Correct Option:
(A)
Question Solution:
h of screw
\ h = (tan Æ / (tan(a+ Æ))
\ for self locking Æ ³ a or a £ ³
\ from this expression h of self locking screw is less than 1/2 or 50% if the h is more then 50% screw is said to be so maximum h is 50%
question-answer-faq-5138