Perpendicularity of an offset may be judged by eye, if the length of the offset is ............

For which of the following permanent adjustments of theodolite, the spire test is used?

"Cross-section" and "Longitudinal sectioning" is ............

In route surveys, the most suitable method of contouring is ............

The first reading from a level station is ............

Local attraction in compass surveying may exist due to ............

An angle made by a survey line with the prolongation of the proceeding line, is known as ............

The properties of autogenous curve for automobiles are given by ............

For preparation of contour plan for a route survey ............