Back bearing of a line is equal to ............

The degree of the curve is the angle subtended by a chord of ............ length.

The angle by which the forward tangent deflects from the back tangent of a curve is known as ............

The correction for sag is ............

An angle between the inclined line of sight and the horizontal is called ............

While doing leveling in undulating terrain, it is preferable to set level on ............

The theodolite is an instrument used for measuring very accurately ............

For taking offsets with an optical square on the right hand side of the chain line, it is held ............

The angle of field of the telescope ............