Surveying
Check lines (or proof lines) in Chain Surveying, are essentially required

To plot the offsets
To indicate the accuracy of the survey work
To increase the out-turn
To plot the chain lines

ANSWER DOWNLOAD EXAMIANS APP

Surveying
A ’level line’ is a

line parallel to the mean spheriodal surface of earth
horizontal line
line passing through the objective lens and the eye-piece of a dumpy or tilting level
line passing through the center of cross hairs and the center of eye piece

ANSWER DOWNLOAD EXAMIANS APP