Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 4 (Q.No. 46)
46.
A standard steel tape of length 30 m and cross-section 15 x 1.0 mm was standardised at 25°C and at 30 kg pull. While measuring a base line at the same temperature, the pull applied was 40 kg. If the modulus of elasticity of steel tape is 2.2 x 106 kg/cm2, the correction to be applied is
Discussion:
27 comments Page 3 of 3.
B N YADAV said:
9 years ago
(Pm-Po)L/AE.
If Pm is greater than Po, the correction will be positive ie. +0.000909 m.
If Pm is greater than Po, the correction will be positive ie. +0.000909 m.
Apcivil@n said:
9 years ago
It should be C as P is greater than Po +ve is the answer.
RK said:
9 years ago
I agree with @Satish as the length of the tape is more so measures length will less so correction will be less.
Ajmal Khan said:
9 years ago
No, @Satish the answer A is correct because the standard pull is 30 Kg and applied pull is 40 Kg, so the tape will measure long distance than actual, so the final result must be subtracted from measured distance. That's why it is negative one.
(1)
Satish said:
9 years ago
But in my point of view c option is correct because pm >po then correction is positive.
Can anyone agree with me?
Can anyone agree with me?
Ajay said:
9 years ago
Correction = (P-p) * L/A * E
=> (40-30) * 30/15 * 2.2 * 10^6.
=> (40-30) * 30/15 * 2.2 * 10^6.
Jay ghosh said:
10 years ago
Applied pull 40 kg and standardized pull 30 kg. So value of correction is +0.000909 m and answer is (C).
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