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 1 of 2.
Neelesh said:
6 years ago
Since temp fall from 20 to 18.
So fall in temp = compression.
So, Answer C is right.
So fall in temp = compression.
So, Answer C is right.
(1)
A Ali said:
5 years ago
It should be option D.
(1)
Allu said:
3 years ago
D is the right answer. I too agree.
(1)
Rahul verma said:
2 years ago
Option D is correct.
Compression in the free bar but, due to fixed conditions it will experience opposite stress which is tensile.
Compression in the free bar but, due to fixed conditions it will experience opposite stress which is tensile.
(1)
Vicky vikrant said:
9 years ago
I think 44 kg/cm^2 tensile is the right answer.
Chhaya said:
8 years ago
Yes @Vicky, the right answer is D.
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.
Hariram said:
8 years ago
According to me, there is no chance of being compressive.
Vivek said:
7 years ago
How? Explain please.
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.
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