Surveying
Theodolite is an instrument used for

measurement of horizontal angles only
measurement of both horizontal and vertical angles
measurement of vertical angles only
tightening the capstan-headed nuts of level tube

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

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