engineering recuitment HPCL Junior Executive 2025 Mock Test Strength of Materials Simple Stress and Strain Thermal Stress and Strain
The young's modulus and thermal stress developed in a steel rod of diameter 2 cm and length 2 m are 200 GPa and 288 MPa respectively, this experiences heating from temperature 30°C to 150°C and the rod has been restricted in the original position. Calculate the value of the coefficient of thermal expansion.
1
1.2 × 10-5/°C
2
12 × 10-4/°C
3
12 × 10-5/°C
4
None of these