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__________ instrument is used to sight to an object.

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in Basic Civil Engineering by (111k points)
__________ instrument is used to sight to an object.

(a) Compass

(b) U-frame

(c) Plumbing fork

(d) Alidade

The question was asked by my college director while I was bunking the class.

I would like to ask this question from Plane Table Surveying in chapter Basic Surveying of Basic Civil Engineering

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Correct answer is (d) Alidade

Explanation: Alidade is a straight edge with some form of sighting device. It can be plain (with slits) or telescopic. It is kept on a plane table and objects are sighted.

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