The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is (A) Reciprocal levelling (B) Precise levelling (C) Differential levelling (D) Flying levelling

The method of finding out the difference in elevation between two points for eliminating the 

effect of curvature and refraction, is 

(A) Reciprocal levelling 

(B) Precise levelling 

(C) Differential levelling 

(D) Flying levelling 

by

1 Answer

Answer :

(A) Reciprocal levelling 

by

Related questions

In reciprocal levelling, the error which is not completely eliminated, is due to (A) Earth's curvature (B) Non-adjustment of line of collimation (C) Refraction (D) Non-adjustment of the bubble tube

Description : In reciprocal levelling, the error which is not completely eliminated, is due to  (A) Earth's curvature  (B) Non-adjustment of line of collimation  (C) Refraction  (D) Non-adjustment of the bubble tube 

Last Answer : (C) Refraction 

Determining the difference in elevation between two points on the surface of the earth, is known as (A) Levelling (B) Simple levelling (C) Differential levelling (D) Longitudinal levelling

Description : Determining the difference in elevation between two points on the surface of the earth, is known as (A) Levelling (B) Simple levelling (C) Differential levelling (D) Longitudinal levelling

Last Answer : (C) Differential levelling

Which of the following statements is incorrect? (A) Error due to refraction may not be completely eliminated by reciprocal levelling (B) Tilting levels are commonly used for precision work (C) The last reading of levelling is always a foresight (D) All of the above statements are incorrect

Description : Which of the following statements is incorrect? (A) Error due to refraction may not be completely eliminated by reciprocal levelling (B) Tilting levels are commonly used for precision work (C) The last reading of levelling is always a foresight (D) All of the above statements are incorrect

Last Answer : (D) All of the above statements are incorrect

Probable accidental error in precise levelling as recommended by International Geodetic Association should not exceed (where k is in kilometers.) (A) ± 0.1 k mm (B) ± 0.5 k mm (C) ± 1 k mm (D) ± 5 k mm

Description : Probable accidental error in precise levelling as recommended by International Geodetic Association should not exceed (where k is in kilometers.) (A) ± 0.1 k mm (B) ± 0.5 k mm (C) ± 1 k mm (D) ± 5 k mm

Last Answer : (C) ± 1 k mm

Probable systematic error in precise levelling as recommended by International Geodetic Association should not exceed (where is in kilometers.) (A) ± 0.1 k mm (B) ± 0.2 k mm (C) ± 0.1 k (D) 0.2 k mm

Description : Probable systematic error in precise levelling as recommended by International Geodetic Association should not exceed (where is in kilometers.) (A) ± 0.1 k mm (B) ± 0.2 k mm (C) ± 0.1 k (D) 0.2 k mm

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The combined effect of curvature and refraction over a distance kilometres is (A) 67.2 L2 mm (B) 76.3 L2 mm (C) 64.5 L2 mm (D) None of these

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Last Answer : (A) 67.2 L2 mm

Refraction correction (A) Completely eliminates curvature correction (B) Partially eliminates curvature correction (C) Adds to the curvature correction (D) Has no effect on curvature correction

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Which of the following statements about risk is true? Select one: a. Project risk focuses on identifying, assessing, and eliminating the risks on the project. b. Risk management is all about eliminating risk. c. Project risk is an uncertain event that, even if it occurs, has no effect on project objectives. d. There are no risk-free projects. e. Risk management involves identification, evaluation, and elevation of risk

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In case of levelling, backsight is (a) A fixed point of known elevation (b) The last staff reading taken before shifting the instrument (c) The first staff reading taken after setting the instrument (d) Any staff reading taken on a point of unknown elevation

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Last Answer : (c) The first staff reading taken after setting the instrument

Explain reciprocal levelling with neat sketch.

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The difference in gradients after full super-elevation and the initial alignment of a road, is known as (A) Ruling gradient(B) Rising gradient (C) Compensated gradient (D) Differential gradient

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Last Answer : Answer: Option D

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Pick up the incorrect statement from the following. The super-elevation on roads is (A) Directly proportional to width of pavement (B) Directly proportional to velocity of vehicles (C) Inversely proportional to acceleration due to gravity (D) Inversely proportional to the radius of curvature

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If x% is the gradient of an alignment and y% is the gradient after proper super-elevation along a curved portion of a highway, the differential grade along the curve, is (A) (x + y) % (B) (x - y) % (C) (y - x) % (D) (y + x) %

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Differentiate between simple levelling and differential levelling with neat sketch.

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