Surveying
The nearest star is so far away from the earth that the directions to it from two diametrically opposite points on the earth differs less than

0.001 second
0.01 second
0.0001 second
None of these

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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
line passing through the objective lens and the eye-piece of a dumpy or tilting level
horizontal line

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