The maximum spacing of manholes specified by Indian standard in sewers upto 0.3 m diameter is
A. 20 m
B. 30 m
C. 45 m
D. 75 m
Answer: Option C
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The effluent of a septic tank is
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B. Foul and contains dissolved and suspended solids
C. As good as that from a complete treatment
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The spacing of manhole is recommended in IS 1742-1960, For sewer up to 0.3 m diameter or sewers which cannot be entered for cleaning or inspection the maximum spacing between the manholes recommended is 30 m, and 300 m Spacing for pipe greater than 2.0 m diameter
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