civil-engineering-surveying Related Question Answers

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





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