When internal angles are to be subtended by a theodolite survey for closed traverse ............

A tape of length l and weight W kg/m is suspended at its ends with a pull of p kg, the sag correction is ............

An imaginary line tangential to the longitudinal curve of the level at the centre of the tie is called ............

Ramsden eye-piece consists of ............

The curvature of the earth's surface is taken into account only if the extent of survey is more than ............

When several contours coincide, it indicates ............

In any closed traverse, if they survey work is correct, then ............

Setting out of a simple curve by two theodolite method does not require ............

Determining the difference in elevation between two points on the surface of the earth, is known as ............