8/2/2019 c1ce02 c1106 Surveying Set1

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8/2/2019 c1ce02 c1106 Surveying Set1

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Code No: C1CE02-C1106 N5/05

(b) A reverse curve is to be set out between two parallel tangents 30 m apart. Theline joining the two tangent points is 300 m. The two arcs of the curve havethe same radius. Calculate the necessary data to set the curve on the eld byoffsets from a long chord at intervals of 20 m from the common tangent point.

[10+10]

6. (a) Describe Base Line Measurement. What are the points which have to beconsidered in selection of site for base line measurements.

(b) A base line was measured between two points A and B at an average elevationof 224.35m. The corrected length after applying all corrections was 149.3206m. Reduce the length to mean sea level. Take earths mean radius 6367 km.

[10+10]

7. (a) Explain the principle of Electronic measuring devices. Also discuss the classi-cation of EDM instruments.

(b) Describe the principle and working of Laser Level. [10+10]

8. (a) Explain how the ground coordinates of points w hose images appear in a ver-tical photograph are determined.

(b) A pair of photographs was taken with an aerial camera from an altitude of 4000m above MSL. The mean principal base measured is 88 mm. The differencein parallax between two points is 1.5 mm. Determine the difference in heightbetween the two points if the elevation of the lower point is 450 m above MSL.Calculate the difference in elevation corresponding to parallax difference of 1.9mm. [10+10]

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