547. For efficient working of a sewer, it must be ensured that _____________? September 7, 2025 by Admin A. Minimum velocity of 0.45 m/sec, is maintained at its minimum flow B. A maximum velocity of 0.90 m/sec, is maintained at its maximum flow C. Both A. and B. D. Neither A. nor B. ✅ The correct answer is option C.
