Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 6 (Q.No. 12)
12.
A steel bar of 2 m length is fixed at both ends at 20°C. The coefficient of thermal expansion is 11 x 10-6/°C and the modulus of the elasticity is 2 x 106 kg/cm2. If the temperature is changed to 18°C, then the bar will be experience a stress of
Discussion:
16 comments Page 2 of 2.
Lov said:
7 years ago
It is fixed from both ends so elongation will not take place.
Hence, 11x10^-6 x 2x10^6 x 20 = 44 kg /cm^2 compreesive is the right answer.
Hence, 11x10^-6 x 2x10^6 x 20 = 44 kg /cm^2 compreesive is the right answer.
Vivek said:
7 years ago
How? Explain please.
Hariram said:
8 years ago
According to me, there is no chance of being compressive.
Roy said:
8 years ago
When temperature increases thermal stress induced in steel rod is compressive and when temp decreases it is tensile in nature. So option D is the correct answer.
Chhaya said:
8 years ago
Yes @Vicky, the right answer is D.
Vicky vikrant said:
9 years ago
I think 44 kg/cm^2 tensile is the right answer.
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