Surveying
The great circle which passes through the zenith, nadir and the poles, is known as

Meridian
None of these
Vertical circle
Prime vertical

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Surveying
In the prismatic compass

the magnetic needle and graduated circle do not move with the box
the magnetic needle moves with the box
the line of the sight does not move with the box
the graduated circle is fixed to the box and the magnetic needle always remains in the N-S direction

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Surveying
For a line AB

the forebearing of AB and back bearing of AB differ by 180°
none is correct
the forebearing of AB and back bearing of BA differ by 180°
both (A) and (B) are correct

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