Surveying
Spring tides are caused when

None of these
Solar tidal force and lunar tidal force both coincide
Solar tidal force acts opposite to lunar tidal force
Sun and moon are in line with earth

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Surveying
The cross hairs in the surveying telescope are placed

much closer to the objective lens than to the eye piece
much closer to the eye-piece than to the objective lens
midway between eye piece and objec-tive lens
anywhere between eye-piece and objective lens

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Surveying
Which of the following errors is not eliminated by the method of repetition of horizontal angle measurement ?

error due to displacement of station signals
error due to eccentricity of verniers
error due to inaccurate graduation
error due to wrong adjustment of line of collimation and trunnion axis

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