Question

Q65. A screw jack is said to be self-locking if its
efficiency is
(A) Less than 50%
(B) Equal to 50%
(C) More than 50%
(D) 100%​

Answer 1

Answer:

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Step-by-step explanation:

Efficiency of self locking screws is less than 1/2 or 50%. If the efficiency is more than 50%, then the screw is said to be overhauling. Explanation: Efficiency of self locking screws is less than 1/2 or 50%.