Diaphragm of a surveying telescope is held inside ............

In a quadrantal system, the bearing of a line is measured ............

In indirect method of contouring, the best method of interpolation if contours ............

The ratio of the focal length of the objective to that of an eye-piece of a telescope is called its ............

The angle between two plane mirrors of the optical square is kept ............

If D is the angle of deflection of a simple curve of radius R, the length of its long chord, is ............

The principle of working from whole to part is used in surveying because ............

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

For locating the locations of the individual points according to situation we resort to ............