Surveying
The rise and fall method of levelling provides a complete check on

All of these
intermediate sight
foresight
backsight

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Surveying
Contour interval is

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

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Surveying
Bowditch rule is applied to

None of these
an open traverse for graphical adjustment
a closed traverse for adjustment of closing error
determine the effect of local attraction

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