Civil Engineering - UPSC Civil Service Exam Questions - Discussion

3. 

A steel rod, 100 mm long is held between two rigid supports. It is heated by 20°C. If the coefficient of thermal expansion of the material of the rod is 15 x 10-6 /° C and modulus of elasticity is 200 x 103 MN/m2, what is the stress in the rod ?

[A]. 20 MN/m2
[B]. 40 MN/m2
[C]. 60 MN/m2
[D]. 80 MN/m2

Answer: Option C

Explanation:

No answer description available for this question.

Lara said: (Jul 9, 2017)  
Please explain the answer.

Dharshit said: (Oct 14, 2017)  
= Alpha*T*E.
= 15*10^-6 *20*200*10^3.

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