Question

What is the mechanical advantage of the screw shown below?

A. 1.3
B. 3.9
C. 8.0
D. 10.4

Answer 1

C. 8.0

Explanation:

The mechanical advantage is got from dividing the circumference of the shaft by the pitch of the screw.

Therefore, the circumference= 2πr

=2×π×2.3mm

=14.45mm

Mechanical advantage=14.45mm/1.8mm

=8.03