Question

The amount of test cycles required to find out the fatigue stress of hard steels is ___________

(a) 10,000,000

(b) 2600

(c) 26

(d) 2,000,000

This question was posed to me during an internship interview.

My question is from Aircraft Materials in division Testing Aircraft Materials of Aerospace Materials & Processes

Answer 1

Correct choice is (d) 2,000,000

Explanation: Performing a fatigue test on a material is a very difficult task. The amount of test cycles required to be performed on hard steels is 2,000,000. For soft steels, the number of cycles required is 10,000,000.