Surveying
Which of the following is not used in measuring perpendicular offsets ?

optical square
cross staff
steel tape
line ranger

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Surveying
A ’level line’ is a

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

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

All of these
By subtracting their longitudes if places are in the same hemisphere
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

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Surveying
The rise and fall method

provides a check on the reduction of intermediate point levels
is not suitable for levelling with tilting levels
quicker and less tedious for large number of intermediate sights
is less accurate than height of instrument method

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