In horizontal angles, the error due to imperfect leveling of the plate bubble is ............

Left swing is not much favoured in theodolite survey because ............

In a whole circle bearing system N25°15'W corresponds to ............

The zero of the graduated circle of prismatic compass is located at ............

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

The latitude and departure of a traverse line are both positive when the whole circle bearing of the line lies in the ..…

If a chain is used at a temperature ............ the temperature at which it was calibrated, the error in measured lengt…

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

A line joining some fixed points on the main survey lines, is called a ............