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

Related MCQs

• When the effect of refraction is taken into account in levelling, the true staff reading is obtained by subtracting the correction for refraction from the observed staff reading.
• A method of differential levelling is used in order to find the difference in elevation between two points when
• It is required to find the difference in elevation between two points A and B. During levelling, it is found that the staff reading at B is more than the staff reading at A. It indicates that the point A is
• As applied to staff readings, the corrections for curvature and refraction are respectively The above table shows a part of a level field book. The value of X should be
• Combined correction for curvature and refraction for 800 m distance is……
• In levelling, the correction for combined curvature and refraction (in metres) is equal to
• Determining the relative positions of points on above or beneath the surface of the earth by means of direct or indirect measurements of distance and direction and elevation is called as _________
• In levelling, the effect of refraction may be taken as
• In levelling, the effect of refraction varies with the atmospheric conditions
• An arbitrary surface with reference to which the elevation of points are measured and compared, is called