In distribution pipes, drain valves are provided at __________(a) lower point(b) higher joint(c) junction points(d) anywhereI have been asked this question in semester exam.I would like to ask this question from Water Supply, Electrical and Road Work topic in division Rules and Methods of Measurement of Civil Engineering Drawing

In distribution pipes, drain valves are provided at __________(a) lowe

1.	In distribution pipes, drain valves are provided at __________(a) lower point(b) higher joint(c) junction points(d) anywhereI have been asked this question in semester exam.I would like to ask this question from Water Supply, Electrical and Road Work topic in division Rules and Methods of Measurement of Civil Engineering Drawing
Answer» Right choice is (a) lower point Easiest explanation: The drain valve is subject to SEVERE erosion due to the COMBINED effect of drain DISCHARGE under high differential pressure at plant STARTUP and the spouting of oxidized scale INSIDE the piping. Although drain valve have a short operating life due to their severe usage conditions, we offer a selection of drain valve with enhanced erosion resistance in an effort to increase their operating life.

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