Surveying
Overturning of vehicles on a curve can be avoided by using

transition curve
vertical curve
compound curve
reverse curve

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Surveying
In the prismatic compass

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

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Surveying
For a line AB

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

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