A plain scale is used to read ............

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

In measuring horizontal angles, the theodolite should be turned ............

Diurnal variation of magnetic declination is ............

To orient a plane table at a point with two inaccessible points, the method generally adopted, is ............

Direct ranging is possible only when the end stations are ............

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

The adjustment of horizontal cross hair is required particularly when the instrument is used for ............

Pantagraph is used for ............