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The correction to be applied to each 30 metre chain length along θ slope , is
- a)30 (sec θ – 1) m
- b)30 (sin θ –1) m
- c)30 (cos θ – 1) m
- d)30 (tan θ – 1) m
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
The correction to be applied to each 30 metre chain length along &thet...
Correct Answer :- C
Explanation : Actual slope correction is always -ve therefore,
Correction = - [L(1 - cosθ)].
= (Lcosθ - L).
= L(cosθ - 1) ; now L is 30m chain.
So the answer comes out to be = 30(cosθ - 1) m.
Most Upvoted Answer
The correction to be applied to each 30 metre chain length along &thet...
A curved surface depends on the radius of curvature of the surface. This correction is known as the "chainage correction" and is calculated using the formula:
Chainage correction = (R/2) x (sinθ/2)
Where R is the radius of curvature and θ is the angle subtended by the arc of the curve.
For example, if the radius of curvature of a curved surface is 100 meters and the angle subtended by the arc of the curve is 10 degrees, then the chainage correction for each 30 metre chain length would be:
Chainage correction = (100/2) x (sin10/2) = 8.66 meters
Therefore, for every 30 metre chain length along the curved surface, an additional 8.66 meters would need to be added to the measured length to account for the curvature.
Chainage correction = (R/2) x (sinθ/2)
Where R is the radius of curvature and θ is the angle subtended by the arc of the curve.
For example, if the radius of curvature of a curved surface is 100 meters and the angle subtended by the arc of the curve is 10 degrees, then the chainage correction for each 30 metre chain length would be:
Chainage correction = (100/2) x (sin10/2) = 8.66 meters
Therefore, for every 30 metre chain length along the curved surface, an additional 8.66 meters would need to be added to the measured length to account for the curvature.
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The correction to be applied to each 30 metre chain length along θslope , isa)30 (sec θ– 1) mb)30 (sin θ–1) mc)30 (cos θ– 1) md)30 (tan θ– 1) mCorrect answer is option 'C'. Can you explain this answer?
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