Surveying
The size of a plane table is

750 mm × 900 mm
300 mm × 450 mm
600 mm × 750 mm
450 mm × 600 mm

ANSWER DOWNLOAD EXAMIANS APP

Surveying
The error due to eccentricity of inner and outer axes can be eliminated by

double sighting
taking both face observations and taking the mean of the two
taking mean of several readings distributed over different portions of the graduated circle
reading both verniers and taking the mean of the two

ANSWER DOWNLOAD EXAMIANS APP