The rise and fall method of reduction of levels, provides a check on ............

The instrument attached to the wheel of a vehicle in order to measure the distance travelled, is called ............

The image formed by the objective in the plane of cross hairs is ............

For the revision of an existing survey with the help of plane table we generally use ............

In direct method of contouring, the process of locating or identifying points lying on a contour is called ............

A level line is ............

From any point on the surface with a given inclination ............

When the temperature rises, length of bubble ............

The best method of interpolation of contours, is by ............