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During levelling if back sight is more than fore sight, then:

AForward staff point is lower than backward staff point

BBackward staff point is lower than forward staff point

CDifference in level cannot be measured

DNone of the above

Answer:

B. Backward staff point is lower than forward staff point


Related Questions:

Example for derived reading in levelling work is:
The use of an optical square is:
Auxiliary theodolite station near an inaccessible main triangulation station:
Indirect ranging using Theodolite is called:
Reciprocal ranging is adopted when the following is encountered: