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.
Rajesh said:
8 years ago
When pull the tape more than standard then the measurement will be less than 30m. So sure the correction to be added to measured length.
Abhishek Anand said:
9 years ago
Ans must be C.
As the applied pull is more than std pull so the length of tape increases.Hence the distance measured becomes less than actual.
Correction = +'ve if app>std pull.
Correction = - ve if app<std pull.
Cp=(P-Ps)L/AE;
P=app pull.
Ps=std pull.
As the applied pull is more than std pull so the length of tape increases.Hence the distance measured becomes less than actual.
Correction = +'ve if app>std pull.
Correction = - ve if app<std pull.
Cp=(P-Ps)L/AE;
P=app pull.
Ps=std pull.
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.
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.
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