 # Civil Engineering Objective Questions { Surveying }

246. A dumpy level was set up at the mid-point between two pegs A and B, 50 m apart and the staff readings at A and B were 1.22 and 1.06. With the level set up a A, the readings at A and B were 1.55 and 1.37. The collimation error per 100 m length of sight is

247. The bearings of the lines AB and BC are 146? 30' and 68? 30'. The included angle ABC is

248. While setting a plane table at a station it was found that the error in centering was 30 cm away from the ray of length 40 m drawn from the station. If the scale of the plan is 1. cm = 2 cm, the displacement of the end of the ray in plan from the true position will be

249. The staff reading at a distance of 80 m from a level with the bubble at its centre is 1.31 m. When the bubble is moved by 5 divisions out of the centre, the reading is 1.39 m. The angular value of the one division of the bubble, is

250. Staff readings on pegs x and y from X station are 1.755 m and 2.850 m, and from station Y on staff head at Y and X are 0.655 m and 1.560 m. If,reduced level of X is 105.5 m, the reduced level of Y is

251. Probable accidental error in precise levelling as recommended by International Geodetic Association, should not exceed where k is in kilometers.

252. Probable systematic error in precise levelling as recommended by International Geodetic Association should not exceed

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