The telescope of a dumpy level ............

In chain surveying, perpendiculars to the chain line, are set out by ............

For accurate work, the steel band should always be used in preference to chain because the steel band ............

The adjustment of horizontal cross hair is required particularly when the instrument is used for ............

Tacheometric formula for horizontal distance using horizontal sights can also suitabel be employed for inclined sights t…

Magnetic bearing of a survey line at any place ............

Correction for refraction for a distance of 1 km = ............

An angles of 45° with a chain line may be set out with ............

The distance between terminal points computed from known, as ............