Q: As per IS 11401 (part 2) : 1990, the recommended value of filtration rate for slow sand filters in the rural water supply is: IS 11401 (भाग 2) : 1990 के अनुसार ग्रामीण जल आपूर्ति में मन्द रेत फिल्टर के लिए फिल्टर दर का अनुशंसित मान है-
A.
0.1 - 0.2 m/h
B.
0.25 - 0.3 m/h
C.
0.4 -0.5 m/h
D.
0.3 - 0.43 m/h
Correct Answer:
Option A -
Explanations:
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