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.
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)
Apk said:
3 years ago
It should be Tensile.
Mathivathani said:
3 years ago
Please explain the Formula.
Allu said:
3 years ago
D is the right answer. I too agree.
(1)
Abhishek Thakur said:
4 years ago
Stress on 20°C = 440kg/cm^2,
Stress on18°/C = 396kg/cm^2,
Stress on18°< stress on 20°C.
Therefore compression will occurs,
Due to decrease in temperature.
Stress on18°/C = 396kg/cm^2,
Stress on18°< stress on 20°C.
Therefore compression will occurs,
Due to decrease in temperature.
Gurmeet Kaur said:
4 years ago
Fall in temp =tension produced in martial.
Temp trying to compress the material but material try to expand.
Temp trying to compress the material but material try to expand.
A Ali said:
5 years ago
It should be option D.
(1)
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)
Pavan said:
6 years ago
There is no mention as temperature Increases. There is mention as changed.
Himanshu said:
7 years ago
During an increase in temperature steel try to expand or decrease in temp steel will contract. So, the correct is option C.
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