Which of the following errors can be neutralised by setting the level midway between the two stations ?
A. error due to curvature only
B. error due to refraction only
C. error due to both curvature and re-fraction
D. none of the above
Answer:C
Which of the following errors can be neutralised by setting the level midway between the two stations ?
A. error due to curvature only B. error due to refraction only C. error due to both curvature and re-fraction D. none of the above