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Which type of dressing does the figure below represent?(a) Pitch faced dressing(b) Furrowed finish(c) Combed finish(d) Fine toolingI have been asked this question in final exam.My query is from Quarrying and Dressing of Stones in section Materials for Construction of Basic Civil Engineering

Answer»

Right choice is (d) Fine tooling

Easy explanation: Fine tooling involves removing PROJECTIONS till a fairly smooth surface is OBTAINED. In pitch faced dressing, the edges are levelled and the flaws on the face of the stone is allowed to remain. In furrowed finish, a fixed margin is sunk on all sides with a CENTRAL portion projecting. In the combed finish, a comb with steel teeth is rubbed on the surface.



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