A leveling station is a place where ............

The variation of magnetic declination within a day is called ............

A line normal to the plumb line at all points is known as ............

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

The stadia lines of a tacheometer are ............

Sensitiveness of Bubble tube ............

The method generally preferred to for contouring an undulating area, is ............

When the measured length is less than the actual length, the error is known as ............

Local attraction at a place may be due to ............