In any closed traverse, if they survey work is correct, then ............

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

The difference between the most probable value and its observed value is ............

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

Line of collimation ............

In an adjusted level, when the bubble is central, the axis of the bubble tube becomes parallel to ............

When the staff is held on a B.M. of R.L. 100.000, the staff reading was 2.000. When the staff is held on station P, the …

The operation of turning the table so that all the lines on the paper are parallel to the corresponding lines on the gro…

While viewing through a level telescope and moving the eye slightly, a relative movement occurs between the image of the…