The least count of a levelling staff is

The imaginary line passing through the intersection of cross hairs and optical centre of the objective is known as

A relatively fixed point of known elevation above datum, is called

The method of surveying used for determining the relative heights of points on the surface of the earth is called

A staff reading taken on a point whose elevation is to be determined as on a change point is called

The observation is taken on a change point is :

……….type of errors rises due to imperfect focusing.

The back sight reading on a bench mark of 'RL. 200.00m is 2.685 and fore sight reading on 'B* is 1.305m the RL of B is:

The height of instrument and the reduced level of a point, if its foresight reading is 1.845 m and the back sight reading on a bench mark of R.L 250.000 m is 2.985 m are :

The first staff reading after the level has been moved to a new position, is

Which of the following is not true?

A dumpy level is set up between atations A and B. Staff is held at A whose reduced our 100,000 and Back Sight is noted as 1.100, then Fore Sight is noted as 1.000 after holding the staff at B. What is the reduced level of B?

The height of instrument method is :

.…………..is a point denoting shifting of the level.

BM in surveying designates:

The line of collimation method of reduction of levels, does not provide a check on

A fixed point of known elevation is :

Leveling is the art of finding the…….. of the objects on the surface of the earth.

In rise and fall method of reduction of levels provides a check on :