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Q. |
What is the minimum diameter of pipes used for drainage of waste water? |
A. | 50 mm |
B. | 75 mm |
C. | 100 mm |
D. | 105 mm |
Answer» B. 75 mm | |
Explanation: waste water is from showers, basins, kitchen sinks, washing machines and the like. this is also called grey water. |
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