Which of the following statements is in-correct ?
A. Error due to refraction may not be completely eliminated by reciprocal levelling.
B. Tilting levels are commonly used for precision work.
C. The last reading of levelling is always a foresight.
D. All of the above statements are incorrect.
Answer:D
Which of the following statements is in-correct ?
A. Error due to refraction may not be completely eliminated by reciprocal levelling. B. Tilting levels are commonly used for precision work. C. The last reading of levelling is always a foresight. D. All of the above statements are incorrect.