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| Q. |
Septic tank is usually consists of brick wall in cement not less than |
| A. | 20 cm |
| B. | 100 cm |
| C. | 80 cm |
| D. | 200 cm |
| Answer» A. 20 cm | |
| Explanation: septic tank is usually consists of brick wall in cement not less than 20cm(9”) thick and the foundation floor are of cement concrete 1:3:6 or 1:2:4. both inside and outside faces of wall and floor are plastered with a minimum thickness of 12mm thick cement mortar 1:3 and all inside corners are rounded. | |
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