Surveying
Sidereal day

Is slightly shorter than an ordinary solar day
Is divided into the conventional hours, minutes and seconds
All listed here
Is the period of time taken by the earth in making a complete rotation with reference to stars

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Surveying
Spring tides are caused when

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

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