Surveying
The necessary geometrical condition for triangulation adjustment is:

The sum of the eight angles of a braced quadrilateral should be 360°
The sum of the angles around a station should be 360°
The sum of the three angles of a plane triangle should be 180°
All listed here

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Surveying
Pick up the correct statement for horizontal photographs.

All listed here
The lines parallel to the negative plane are projected as parallel lines
Parallel lines do not appear parallel in central projection
The two sides of a road meet at the vanishing point

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Surveying
Spring tides are caused when

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
None of these

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