A staff reading taken on a bench mark or a point of known elevation is called

Related MCQs

• 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
• A staff reading taken on a point whose elevation is to be determined as on a change point is called.
• 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.
• When a staff is sighted through the telescope, a certain length of staff is intercepted by the stadia lines. The staff intercept varies with the distance at which the staff is held.
• The levelling should always commence from a temporary bench mak and end on a permanent bench mark.
• If a tripod settles in the interval that elapses between taking a back sight reading and the following foresight reading, then the elevation of turning point will
• The R.L, of the point A which is on the floor is 100 m and back sight reading on A is 2.455 m. If the foresight reading on the point B which is on the ceiling is 2.745 m, the R.L. of point B will be
• When the effect of curvature is taken into account in levelling, the true staff reading is obtained by
• A relatively fixed point of known elevation above datum, is called
• A fixed point of reference of known elevation is called