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