21. The advantage of a prism in a prismatic compass is . . . . . . . .
22. In which method of Tacheometry the stadia hairs are not used . . . . . . . .
23. For a 1° curve the radious is . . . . . . . .
24. The bearings of AB and AC are 41° and 116° 15' respectively taken from A. What is angle BAC.
25. The width across a pond AB shown in . . . . . . . .
26. A chain is standardised with a pull of 100N but during the measurement of a line a pull of 190N is applied. The error in the length of line is . . . . . . . .
27. The line drawn through the points of same declination is known as . . . . . . . .
28. The position of the star when it is farther from the meridien called . . . . . . . .
29. A full chain length is the distance from . . . . . . . .
30. For measurements made with tested chain, plumb bob etc. the usual limit of error is . . . . . . . .
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