Civil Engineering - Surveying - Discussion
Discussion Forum : Surveying - Section 2 (Q.No. 10)
10.
A uniform slope was measured by the method of stepping. If the difference in level between two points is 1.8 m and the slope distance between them is 15 m, the error is approximately equal to
Discussion:
35 comments Page 1 of 4.
Sandeep Gautam said:
1 year ago
Now we know that the given sloping distance is 15 meters and the elevation difference is 1.8 meters.
That means we know the slope i.e. H: V = 15 : 1.8.
But slope gives us the value of horizontal distance per unit error. We want an error per unit horizontal distance here means 1.8 : 15.
That gives us 0.12 which is cumulative of course due to slope. Hence it will be +0.12 cumulative or corrected for +0.11 cumulative.
That means we know the slope i.e. H: V = 15 : 1.8.
But slope gives us the value of horizontal distance per unit error. We want an error per unit horizontal distance here means 1.8 : 15.
That gives us 0.12 which is cumulative of course due to slope. Hence it will be +0.12 cumulative or corrected for +0.11 cumulative.
Shubham P said:
5 years ago
Now we know that given sloping distance is 15meter and difference in elevation is 1.8 meter.
That means we know the slope i.e. H:V = 15 : 1.8.
but slope gives us value of horizontal distance per unit error. We want error per unit horizontal distance here means 1.8 :15.
That gives us 0.12 which is cumulative of course due to slope. Hence it will be +0.12 cumulative or corrected for +0.11 cumulative.
That means we know the slope i.e. H:V = 15 : 1.8.
but slope gives us value of horizontal distance per unit error. We want error per unit horizontal distance here means 1.8 :15.
That gives us 0.12 which is cumulative of course due to slope. Hence it will be +0.12 cumulative or corrected for +0.11 cumulative.
Paru said:
6 years ago
By Pythagoras Theorem, the ground distance is 15.10 and slope distance is 15m.
Since Error = Measured value - True Value, and here Measured value is lesser that is 15m, we get the error as -ve.
Hence correction +ve. Therefore, I agree with Option (A).
Since Error = Measured value - True Value, and here Measured value is lesser that is 15m, we get the error as -ve.
Hence correction +ve. Therefore, I agree with Option (A).
Khushwant Rana 7840858975 said:
8 years ago
In this question, they are asking for error not correction so.
Correction is always negative.
But the error is positive.
That' s why the answer is +11.
As it is a systematic error not random error so it can be called cumulative error.
Correction is always negative.
But the error is positive.
That' s why the answer is +11.
As it is a systematic error not random error so it can be called cumulative error.
Abhishek Anand said:
9 years ago
Slop error always +'ve and correction always equal to= - (h*h) /2L.
If higher powers neglected otherwise correction increases by (h^4/8L^3).
If higher powers neglected otherwise correction increases by (h^4/8L^3).
Amsal said:
5 years ago
15- √(15^2-1.8^2) = 0.108 = .11.
AND we know slope correction is always negative so the error is positive 0.11.
Option A is correct.
AND we know slope correction is always negative so the error is positive 0.11.
Option A is correct.
(3)
Adeel Rehman said:
5 years ago
Slope correction = h^2/2L = 1.8^2/(2*15) = 0.108~0.11.
Slope error is always + ive slope correction is always -ive.
So, Cumulative Error.
Slope error is always + ive slope correction is always -ive.
So, Cumulative Error.
(7)
SOUVIK said:
9 years ago
I think the answer is [C].cumulative, - 0.11 m; because slope correction is always negative. plz, anyone describes it .
Amit said:
9 years ago
We get Horizontal distance = 14.89 by Pythagoras formula & the error is cumulative.
So, 15 - 14.89 = 0.11.
So, 15 - 14.89 = 0.11.
Siddhartha said:
8 years ago
For positive errors, corrections will be negative and for negative errors, corrections will be positive.
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