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A plumbing fork is used to __________ the plane table.

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A plumbing fork is used to __________ the plane table.

(a) Focus

(b) Centre

(c) Orient

(d) Level

I had been asked this question in an interview for job.

I need to ask this question from Plane Table Surveying topic in portion Basic Surveying of Basic Civil Engineering

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Right option is (b) Centre

To explain: Plumbing fork is also called U-fame. It has a U-shaped frame which can be clamped onto the plane table. The lower end has provision for suspending a plumb bob. It is used to centre the table w.r.t station.

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