In profile leveling, staff readings on two neighbouring pegs 20 m apart are 1.200 and 1.000 respectively. Therefore the proposed road had a ............

Shift of a curve, is ............

An 'are' is the unit of area of a square of side ............

The instrument, belonging to a class of reflecting instrument is ............

A base line in a chain survey ............

The principle of tacheometry is used ............

Grid lines are parallel to ............

The stadia lines of a tacheometer are ............

The tangent to the liquid surface in a level tube, is parallel to the axis of the bubble ............