21. With usual notation identify the formula employed in computing correction due to pull . . . . . . . .
22. In a chain survey, if the surveyor lifts both his arms vertically upwards, the signal means.
23. The distance between the point of intersection and point of the commencement of the curve called . . . . . . . .
24. The instruemtn is used to find the area accurately.
25. The bearing of a line taken with a compass in the direction of progress of survey is called . . . . . . . .
26. The whole circle bearing of a line is 330° 45'. The Quadrantel bearlng . . . . . . . .
27. One of the main principles in survey is to work from . . . . . . . .
28. The art of determining the relative heights or elevations of points or objects on earth surface is known as . . . . . . . .
29. In prismatic compass this encloses the compass . . . . . . . .
30. In the Fig, line XX is called . . . . . . . .
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