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) Centering
The correct sequence of these operations is

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

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Surveying
In triangulation surveys

Sides are not measured excepting the base line
The area is divided into triangular figures
All listed here
Control stations are located from which detailed surveys are carried out

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