Q331
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.
Both (A) and (B)
AnswerAnswer: Option D
Solution
Answer: Option D
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