Contours of different elevations may cross each other only in the case of ............

Which of the following errors can be eliminated by taking mean of both face observations?

For setting out an offset at an angle 45°, ............ cross-staff is used.

The altitude of a traverse leg is obtained by multiplying its length by ............

If the fore bearing of a line is N26°35'W, its back bearing will be ............

Determining the difference in elevation between two points on the surface of the earth, is known as ............

The line in which the plane passing through the given point and the north and south poles intersects the surface of the …

The ratio of the distances at which a stated length can be distinguished by the telescope and the human eye, respectivel…

The chord of a curve less than peg interval, is known as ............