Surveying
The sun's declination remains north between

September 21 to December 21
March 21 to June 21
June 21 to September 21
Both (A) and (B) of above

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Surveying
Theodolite is an instrument used for

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

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