Surveying - Engineering

Q1:

The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known

A levelling

B centering

C orientation

D setting.

ANS:C - orientation

Swinging term is used in Theodolite not in plane table surveying.
So, Orientation should be correct. Orientation means wrt direction. According to me, it should be swinging.