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Stormwater drainage MCQs Civil

30 Score: 0 Attempted: 0/30
1. The main purpose of a stormwater drainage system is to:




2. The type of storm sewer that collects water from streets and discharges it into a main sewer is called:




3. The minimum velocity of flow in a storm sewer to prevent silt deposition is generally:




4. Catch basins in stormwater drainage are used for:




5. The maximum spacing of catch basins on a street is usually:




6. The design of stormwater sewers is usually based on:




7. The rational method is used to:




8. In the rational method, the formula Q = CiA, “C” represents:




9. The runoff coefficient “C” depends mainly on:




10. A combined sewer system carries:




11. The time of concentration in stormwater design is:




12. A stormwater detention basin is provided to:




13. Open channels are preferred over closed conduits when:




14. The slope of a stormwater sewer is generally designed to:




15. In urban areas, stormwater drains are usually designed for:




16. A curved sewer is preferred in stormwater design when:




17. Catch basins should be designed to remove:




18. Retention ponds in stormwater management are mainly used to:




19. The minimum diameter for a circular storm sewer in urban areas is usually:




20. Trunk sewers are designed to:




21. Velocity in stormwater sewer should not exceed:




22. Hydraulic grade line in sewer design represents:




23. Culverts are provided in stormwater drainage for:




24. Stormwater pumping stations are required when:




25. Rooftop drains are connected to:




26. Runoff from impervious surfaces is generally:




27. The rational formula Q = CiA is applicable for drainage areas:




28. Self-cleansing velocity is the minimum velocity required to:




29. Concrete channels in stormwater drainage are preferred for:




30. The primary factor affecting stormwater runoff is:




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