Surveying
After fixing the plane table to the tripod, the main operations which are needed at each plane table station are (i) Levelling (ii) Orientation (iii) CenteringThe correct sequence of these operations is

(i), (iii), (ii)
(ii), (iii), (i)
(iii), (i), (ii)
(i), (ii), (iii)

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Surveying
Bowditch rule is applied to

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

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