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Name the open drains provided for conveying water from kitchens, bathroom and rain water to main sewers.(a) drains(b) Sewers(c) Soak pit(d) Surface drainsThis question was posed to me during an online exam.My question comes from Water Supply Works in portion Road Estimating, Sanitary and Water Supply Work of Civil Engineering Drawing

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Right ANSWER is (d) Surface drains

To explain I would SAY: These are usually provided at the side of the road and along the boundary line of the BUILDING. As far as possible drains should not be laid under the buildings. For efficient draining the surfacedrains should have certain qualities, such as should be laid in such a gradient to develop self -cleaning velocity, should have a reasonable free board at the top, joint should be smooth FINISHED, easy curves, INNER surface should be smooth, cheap in construction and maintenance.



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