Civil Engineering :: Surveying
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Pick up the correct statement from the following :
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The area of a plane triangle ABC, having its base AC and perpendicular height h, is
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The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known
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A relatively fixed point of known elevation above datum, is called
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Cross hairs in surveying telescopes, are fitted
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Metric chains are generally available in
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On a diagonal scale, it is possible to read up to
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Plotting of inaccessible points on a plane table, is done by
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A dumpy level is set up with its eye-piece vertically over a peg A. The height from the top of peg A to the centre of the eye-piece is 1.540 m and the reading on peg B is 0.705 m. The level is then setup over B. The height of the eye-piece above peg B is 1.490 m and a reading on A is 2.195 m. The difference in level between A and B is
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Probable systematic error in precise levelling as recommended by International Geodetic Association should not exceed
(where k is in kilometers.)
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