Machine Design
Which of the following statement is correct regarding power screws?

If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%
The efficiency of a self locking screw can not be more than 50%
Both (A) and (B)
The efficiency of Acme (trapezoidal) thread is less than that of a square thread

ANSWER DOWNLOAD EXAMIANS APP

Machine Design
A stud

Has head at one end and other end fits into a tapped hole in the other part to be joined
Has pointed threads
Has a head on one end and a nut fitted to the other
Has both the ends threaded

ANSWER DOWNLOAD EXAMIANS APP