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

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

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Surveying
The cross hairs in the surveying telescope are placed

anywhere between eye-piece and objective lens
much closer to the eye-piece than to the objective lens
midway between eye piece and objec-tive lens
much closer to the objective lens than to the eye piece

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