Permanent adjustments of a level are ............

The line normal to the plumb line is known as ............

If the angle between index glass and horizon glasses of a box sextant is 40° the horizontal angle between A and B sight …

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

An invar tape is made of an alloy of ............

Survey plotting can be done with an accuracy of ............

Bergchund is a topographical feature in ............

Ranging is an operation of ............

The angle between the reflecting surface of a prism square is ............