A plain scale is used to read

Three-point problem can be solved by

The graduated ring of a prismatic compass is graduated in

The method of surveying in which field work and plotting work are done simultaneously, is called

The least count of prismatic compass is

When the first object is to be focused, the scale, is set to 0° 00'00" and then

Profile levelling is usually done for determining

During levelling if back sight is more than foresight

Number of subdivision per meter length of a levelling staff is