SSC JE Civil Engineering 2017 Set 4 Solved Paper

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Question : 126 of 200

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Which of the following is the correct meaning of the term ‘level line’ in surveying ?

The line parallel to the mean spheroidal surface of earth.
The line is horizontal.
The line passing through the center of crosshairs and the center of the eye piece.
The line passing through the objective lens and the eye piece of a dumpy or tilting level

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