100 Strength of Materials (SOM) Interview Questions (With Answers) – 2025 Guide

Strength of Materials (SOM) is a core subject in Mechanical, Civil, Aerospace, and Structural engineering interviews. Whether you are preparing for PSU, MNC, or academic interviews, this list of 100+ SOM interview questions with short, crisp answers will help you revise quickly and confidently.

1. Description of the Ideal Vapour Compression Cycle on the P-H Diagram

The Pressure-Enthalpy (P-H) diagram is the most practical representation for the VCS, as the system's performance metrics (work and heat) are directly proportional to changes in enthalpy (h).

The diagram features a saturation dome, with the saturated liquid line on the left and the saturated vapor line on the right. The cycle is composed of four distinct points connected by four processes: