Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 7 (Q.No. 14)
14.
A 30 m steel tape was standardised at 20°C measurements of distances were taken as 15°C. If the coefficient of linear expansion of the material of the tape were 0.00, 00112 degree centigrade, then the error, due to temperature, per tape length would be
Discussion:
16 comments Page 2 of 2.
Majid said:
4 years ago
A is the correct answer.
Paras dhakad said:
4 years ago
B is the correct answer.
Abhishek Thakur said:
4 years ago
@All.
Here, There are two cases possibilities;
1. The temperature of the field is greater than the temperature at which the tape is standardized; Tm > To. This results in an increase in the tape length, making the measured length shorter. Hence the correction is additive.
2. The temperature of the field is lesser than the standardized temperature, i.e. Tm<To, then the tape length decreases. This results in an increase in the measured length than the original. Hence the correction is subtractive.
So, options c is the correct answer
Here, There are two cases possibilities;
1. The temperature of the field is greater than the temperature at which the tape is standardized; Tm > To. This results in an increase in the tape length, making the measured length shorter. Hence the correction is additive.
2. The temperature of the field is lesser than the standardized temperature, i.e. Tm<To, then the tape length decreases. This results in an increase in the measured length than the original. Hence the correction is subtractive.
So, options c is the correct answer
(2)
Apcivilian said:
3 years ago
The Error will be in positive.
(1)
Ashutosh said:
3 years ago
Option C is correct, Tm<T0 and it is -ve.
(2)
LALIT kumar bhat said:
2 years ago
Here it is behaviour as a short chain because temperature decrease than standard temp. In short chain error will be positive and correction will be negative so option A and D is wrong.
Because the questions asks Error due to temperature not correction. Per tape length not per 1m tape length. So C is correct.
Because the questions asks Error due to temperature not correction. Per tape length not per 1m tape length. So C is correct.
(2)
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