# Civil Engineering - Surveying - Discussion

### Discussion :: Surveying - Section 4 (Q.No.18)

18.

The method of finding out the difference in elevation between two points for eliminating the effect of curvature and refraction, is

 [A]. reciprocal levelling [B]. precise levelling [C]. differential levelling [D]. flying levelling

Explanation:

No answer description available for this question.

 Manish said: (Jun 12, 2017) Answer is 3 because in reciprocal levelling curvature of the earth is eliminated and refraction is considered while differential levelling both are eliminated.

 Karam said: (Jan 22, 2018) Answer should be 3.

 Tushar Bhosale said: (Mar 15, 2018) Reciprocal levelling is the right answer.

 Tushar Bhosale said: (Mar 15, 2018) In reciprocal leveling. If the level is placed exactly midway between two points and staff readings are taken to determine the difference of level then the errors (due to inclined colimiation line, curvature and refraction. ) are automatically eliminated.

 Umesh said: (Jul 29, 2019) Reciprocal correction is eliminated the curvature, collimation and refraction correction is partially. So, C is correct.