Surveying
Which of the following is not the function of levelling head ?

None of these
to support the main part of the instrument
to attach the theodolite to the tripod
to provide a means for leveling the theodolite

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Surveying
Pick up the correct statement for horizontal photographs.

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
All listed here

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