A’level line’is a
A. horizontal line
B. line parallel to the mean spheriodal surface of earth
C. line passing through the center of cross hairs and the center of eye piece
D. line passing through the objective lens and the eye-piece of a dumpy or tilting level
Answer:B
A’level line’is a
A. horizontal line B. line parallel to the mean spheriodal surface of earth C. line passing through the center of cross hairs and the center of eye piece D. line passing through the objective lens and the eye-piece of a dumpy or tilting level