Surveying
If two points differing by 1° of latitude and of the same longitude is 110 km apart on the earth, then two astronomical positions on the moon is about

10 km
25 km
30 km
50 km

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Surveying
A telescope is said to be inverted if its

vertical circle is to its right and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is up
vertical circle is to its right and the bubble of the telescope is up

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Surveying
Spring tides are caused when

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

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