The box of prismatic compass is made of

Which one of the following procedures for getting accurate orientation is the most distinctive feature of the art of pla…

An obstacle which obstructs both chaining and ranging may be

The telescope of a Dummy level

A line which joins subsidiary stations on the main lines of a chain survey network and serves to facilitate taking offse…

The error in measured length due to bad ranging is

A level surface to which elevation of different points are referred to, is known as:

A 15 cm theodolite means

In levelling, the correction for combined curvature and refraction (in meters) is equal to