Surveying
Pick up the correct statement from the following. The difference between the longitudes of the places is obtained.

By adding their longitudes if places are in the different hemispheres
By subtracting the sum of their longitudes exceeding 180° from 360° if places are in different hemispheres
By subtracting their longitudes if places are in the same hemisphere
All of these

ANSWER DOWNLOAD EXAMIANS APP

Surveying
A ’level line’ is a

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

ANSWER DOWNLOAD EXAMIANS APP