Surveying
The declination and right ascension of the sun becomes 23° 27' N and 90° respectively on

December 22
September 21
June 21
March 21

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Surveying
A ’level line’ is a

line parallel to the mean spheriodal surface of earth
line passing through the center of cross hairs and the center of eye piece
horizontal line
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.

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

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