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A levelling staff is used to establish:(a) Horizontal line of sight(b) Vertical line of sight(c) Location of points(d) Distance of pointsI had been asked this question in semester exam.This question is from Equipments Used in Levelling topic in chapter Basic Surveying of Basic Civil Engineering

Answer»

Right option is (a) Horizontal line of sight

Best explanation: A levelling staff is a STRAIGHT rectangular rod, with graduations, zero STARTING from foot of staff. It is PLACED at the required POINT and horizontal line of sight from a LEVEL is made.



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