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Civil Engineering Objective Questions { Surveying }

260. The distance between the point of intersection of an up grade + gi% and downgrade g2% and the highest point of the vertical curve of length L, is
A. L(gi -g)400
B. L(gi + g2)400
C. L(g - g2)
D.C L(gi. g2) 800
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261. A level when set up 25 m from peg A and 50 m from peg B reads 2.847 on a staff held on A and 3.462 on a staff held on B, keeping bubble at its centre while reading. If the reduced levels of A and B are 283.665 m and 284.295 m respectively, the collimation error per 100 m is
A. 0.015 m
B. 0.030 m
C. 0.045 m
D. 0.060 m.
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262. In a telescope the object glass of focal length 14 cm, is located at 20 cm from the diaphragm. The focussing lens is midway between them when a staff 16.50 m away is focussed. The focal length of the focussing lens, is
A. 5.24 cm
B. 6.24 cm
C. 7.24 cm
D. 8.24 cm.
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263. The bearing of C from A is N 300 E and from B, 50 metres east of A, is N 60? W. The departure of C from A is
A. 50 m
B. 50 Ad m
C. 25 Ar3- m
D. 25 m.
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264. The latitude of point C as stated in Q. No. 3.285, is
A. 50 m
B. 50 V-3?m
C. 25 ii
D. 25 m.
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265. If the long chord and tangent length of a circular curve of radius R are equal the angle of deflection, is
A. 30?
B. 60?
C. 90?
D. 120?
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266.  Pick up the correct statement from the following :
A. The directions of plumb lines suspended at different points in a survey are not strictly parallel
B. In surveys of small extent, the effect of curvature may be ignored and the level surface of the earth is assumed as horizontal
C. In surveys of large extent, the effect of curvature of the earth must be considered
D. All the above.
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