Civil Engineering MCQAE Level Civil Engineering
Temperature rise required to produce 100 N/mm² in a constrained steel bar (α=12×10⁻⁶/°C, E=200 GPa):
Strength of MaterialsRequired Temperature RiseMEDIUM
Choose the correct answer
A
25°C
B
41.7°C
C
50°C
D
83.3°C
Correct Answer
B. 41.7°C
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ΔT=σ/(Eα)=100/(200,000×12×10⁻⁶)=100/2.4=41.7°C
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