After levelling of an instrument is done what is the next up?

The collimation method for obtaining the reduced levels of points does not provide a check on

Imaginary line passing through points having equal magnetic isogonic line declination is termed as

The maximum allowable limit up to that a measurement may vary from the true value is known as

Total station is

One mile equals to

The angle of intersection of a curve is the angle between

Contour interval is

An instrument used to find slopes of ground is