Question

05. Fatigue strength of a metal is improved by
O(A) Overstressing
O(B) Scratching the surface
O(C) Raising the temperature
(D) Under-stressing​

Answer 1

$\huge\fbox\red{❥answer}$

(D) Under-stressing

(not sure abt ans..!)

Answer 2

Answer:

(D)

Explanation:

=Under - stressing

is the answer