engineering recuitment HPCL Junior Executive 2025 Mock Test Engineering Materials Science Structure and Properties of Engineering Materials Properties of Materials
Hand peening is a method in which the weld zone is hammered along the length with the peen of a hammer, while the joint is hot. Which of the following statements correctly specify the reasons for hand peening?
I. It induces tensile residual stresses.
II. It induces compressive residual stresses.
III. It improves the fatigue life of the joint.
IV. It makes the joint leak-proof.
Choose the best option from below:
1
Statements I and II are correct but III and IV are incorrect
2
Statements II and III are correct but I and IV are incorrect
3
Statements I, II and III are correct but IV is incorrect
4
Statements I, II, III and IV are correct