1. The stations choosed by main survey lines called . . . . . . . .
2. The drawing of an irregular area is covered by 42.2 squares of 200 mm side. If the side of the drawing is 10mm = 1m, the actual area of field . . . . . . . .
3. The 90° corners of a building are set out on the ground by, easily . . . . . . . .
4. The arithmetical check for levelling is . . . . . . . .
5. The bearing of a line which is measured from North of South direction . . . . . . . .
6. The angle between the vertical and fault plane is known as . . . . . . . .
7. The arithematic sum of northings should be equal to arithematic sum of . . . . . . . .
8. The bearing sof PQ and PR are S 20° 30' E and 24°W angle QPR is . . . . . . . .
9. To locate a point with reference to a chain line the rninimum number of oblique measurements required is . . . . . . . .
10. A fixed reference point of known elevation.
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