51. A uniform slope was measured by the method of stepping. If the difference in level between two points is 1.8 m and the slope distance between them is 15 m, the error is approximately equal to
52. In optical reading instruments
53. For setting out a simple curve, using two theodolites.
54. Geodetic surveying is undertaken
55. The desired sensitivity of a bubble tube with 2 mm divisions is 30". The radius of the bubble tube should be
56. A dumpy level was set up at the midpoint 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
57. Keeping the instrument height as 1 m, length of staff 4 m, the up gradient of the ground 1 in 10, the sight on the up slope must be less than
58. True meridian of different places
59. Let angular value of one graduation of a tube of length x be φ seconds and R be the radius of its internal curved surface, then
60. Two hill tops A and B 20 km apart are intervened by a third top C. If the top most contour of the three hill tops are of the same value, state whether the line of sight AB
61. The diaphragm of a stadia theodolite is fitted with two additional
62. Centering error of a theodolite produces an error
63. A tape of length l and weight W kg/m is suspended at its ends with a pull of P kg, the sag correction is
64. The operation of making the algebraic sum of latitudes and departures of a closed traverse, each equal to zero, is known
65. Dr. M.S. Swaminathan has distinguished himself in the field of:?
66. Orientation of a plane table by solving two point problem is only adopted when
67. A back sight
68. If the area calculated form the plan plotted with measurements by an erroneous chain, accurate area of the plan is
69. The sum of the interior angles of a geometrical figure laid on the surface of the earth differs from that of the corresponding plane figure only to the extent of one second for every
70. The systematic errors which persist and have regular effects in the performance of a survey operation, are due to
71. It θ is the probable error of an observed bearing of a line of length l, the error over the whole length of the traverse of n lines of length l is
72. The best method of interpolation of contours, is by
73. Pick up the correct specification of Ramsden eyepiece from the following :
74. The conventional sign shown in below figure represents a
75. Deviation of the actual road gradient from the proposed contou'r gradient up hill side, involves