engineering recuitment ONGC AEE Mechanical Mock Test 2025 Strength of Materials Simple Stress and Strain Thermal Stress and Strain
A 10 m aluminium flagpole is installed at 30°C. After 2 days, the temperature drops to -10° C. How much does the height change of the flagpole (in mm)? (Assume thermal expansion coefficient for aluminium = 23 × 10-6°C-1)
1
7.8 mm
2
8.8 mm
3
9.5 mm
4
9.2 mm
5
10 mm