Surveying
Which of the following methods of offsets involves less measurement on the ground?

all involve equal measurement on the ground
method of oblique offsets
method of perpendicular offsets
method of ties

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Surveying
A ’level line’ is a

line passing through the center of cross hairs and the center of eye piece
line passing through the objective lens and the eye-piece of a dumpy or tilting level
horizontal line
line parallel to the mean spheriodal surface of earth

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Surveying
Contour interval is

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

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Surveying
For a line AB

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

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