81. The unit of linear meesurernent in survey work is . . . . . . . .
82. Tangent length calculated by the formule.
83. The arrow isused to mark
84. For the construction of high way (or) rail way, the required are
85. The back bearing of a line is 22°, its fore bearing is . . . . . . . .
86. Pentagraph is used for . . . . . . . .
87. For two survey points the coordinates are given. The line CD has length and bearing
Point
Southing (m)
Westing (m)
C
280.4
310.8
D
620.9
635.9
| Point | Southing (m) | Westing (m) |
| C | 280.4 | 310.8 |
| D | 620.9 | 635.9 |
88. The errors arising due to eccentricity of the verniers and centre is eiiminated by . . . . . . . . method.
89. A curve whose radious varies gradually from infinity to finite value equal to the radious of circular curve to be connected called as . . . . . . . .
90. The horizontal angle between the true meridian and line is called . . . . . . . .
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