Home
Learn about new technologies!

What is the correct answer?

4

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