Surveying
The station which is selected close to the main triangulation station, to avoid intervening obstruction, is not known as

False station
Satellite station
Pivot station
Eccentric station

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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
Solar tidal force acts opposite to lunar tidal force
None of these

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Surveying
Contour interval is

Directly proportional to the flatness of ground
Larger if the time available is more
Inversely proportional to the scale of the map
Larger for accurate works

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