Engineering Survey

91) If the horizontal distance between the staff point and the point of observation is d, then the error due to curvature of earth is proportional to

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92) The instrument used for accurate centering in plane table survey is

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plumbing fork

93) Three point problem can be solved by

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all of the above

94) The process of determining the locations of the instrument station by drawing

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resection

95) The following consecutive readings were taken with a dumpy level and a 3 m staff on a continuously sloping ground. 0.425, 1.035, 1.950, 2.360, 2.950, 0.750,1.565, 2.450, 0.320, 1.025, 2.165, 2.955 Which of the following readings are back- sights?

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0.425, 2.950, 0.750, 0.320

96) The following consecutive readings were taken with a dumpy level : 0.695. 1.525, 2.395, 0.635, 0.605, 0.805, 0.125 . The instrument was shifted after the third and fifth readings. The readings 2.395 and 0.635 respectively represent where F.S. is foresight, B.S. is backsight and I.S. is intermediate sight.

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F.S and I.S.

97) The R.L, of the point A which is on the floor is 100 m and backsight reading on A is 2.455 m. If the foresight reading on the point B which is on the ceiling is 2.745 m, the R.L. Of point B will be

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105.20m

98) The sensitivity of a bubble tube can be increased by

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increasing the diameter of the tube

99) Which of the following errors can be eliminated by taking mean of both face

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error due to line of collimation not being perpendicular to horizontal axis

100) Agate cap is fitted with a

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prismatic compass

Subject Notes

Objective Box

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