engineering recuitment KPSC JE Civil Mock Test 2020 Strength of Materials Simple Stress and Strain Thermal Stress and Strain
Two steel rails each of 12 m length are laid with a gap of 1.5 mm at ends at a temperature of 24°C. The thermal stress produced at a temperature of 40°C is (take E = 2 × 105 N/mm2, coefficient of thermal expansion = 12 × 10-6 /°C)
1
10.5 N/mm2
2
12.5 N/mm2
3
13.4 N/mm2
4
15.5 N/mm2