The error due to eccentricity of inner and outer axes can be eliminated by
A. reading both verniers and taking the mean of the two
B. taking both face observations and taking the mean of the two
C. double sighting
D. taking mean of several readings distributed over different portions of the graduated circle
Answer:A
The error due to eccentricity of inner and outer axes can be eliminated by
A. reading both verniers and taking the mean of the two B. taking both face observations and taking the mean of the two C. double sighting D. taking mean of several readings distributed over different portions of the graduated circle