Surveying
Polaris is usually observed for the determination of the azimuth when it is

At elongation
Neither at culmination nor at elongation
At culmination
Either at culmination or at elongation

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Surveying
Spring tides are caused when

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

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