76. Measuring with a 30 m chain, 0.01 m too short, introduces
77. Setting out a curve by two theodolite method, involves
78. When the bubble of the level tube of a level, remains central
79. The area of a plane triangle ABC, having its base AC and perpendicular height h, is
80. The vertical angle between longitudinal axis of a freely suspended magnetic needle and a horizontal line at its pivot, is known
81. A relatively fixed point of known elevation above datum, is called
82. Cross hairs in surveying telescopes, are fitted
83. Metric chains are generally available in
84. On a diagonal scale, it is possible to read up to
85. Plotting of inaccessible points on a plane table, is done by
86. 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
87. Probable systematic error in precise levelling as recommended by International Geodetic Association should not exceed
(where k is in kilometers.)
88. The curve composed of two arcs of different radii having their centres on the opposite side of the curve, is known
89. The ratio of the angles subtended at the eye, by the virtual image and the object, is known as telescope's
90. The bubble tube is nearly filled with
91. Simpson's rule for calculating areas states that the area enclosed by a curvilinear figure divided into an even number of strips of equal width, is equal to
92. In a constant level tube, size of the bubble remains constant because upper wall is
93. Prismatic compass is considered more accurate than a surveyor's compass, because
94. In reciprocal levelling, the error which is not completely eliminated, is due to
95. In tacheometrical observations, vertical staff holding is generally preferred to normal staffing, due to
96. Removal of parallax, may be achieved by focussing
97. The direction of steepest slope on a contour, is
98. Back bearing of a line is equal to
99. In an internal focusing telescope
100. The longitudinal section of the surface of bubble tube is