When the length of chain used in measuring distance is longer than the standard length, the error in measured distance will be ............

When the image formed by the objective is not situated in the plane of cross-hairs ............

Correction for pull is ............

It is more difficult to obtain good results while measuring horizontal distance by stepping ............

The radius of curvature of the bubble tube is generally kept ............

Height of instrument method of leveling is ............

The process of turning the telescope about the vertical axis in horizontal plane is known as ............

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 ............

In leveling, the correction for curvature (in meters) is equal ............