134 Water Supply & Sanitation Chapter Wise McQ Test of 25 Question #24 Water Supply & Sanitation Chapter Wise McQ Test of 25 Question for PSC, NEC, UPSC, SSC and Many more. 1 / 25 1. The distance between soak pit and septic should be at least……. A. 3m B. 2m C. 1m D. 0.9m 2 / 25 2. The minimum height of flushing cisterns is A. 1m B. 2m C. 3m D. 4m 3 / 25 3. The capacity of flushing cistern for water closets is A. 1-2 liters B. 10-15 liters C. 5 liters D. 20-25 liters 4 / 25 4. The capacity of flushing cistern is normally A. 12 to 15 liters B. 20 to 25 liters C. 30 to 40 liters D. 1 to 5 liters 5 / 25 5. The capacity of flushing cistern for urinals is generally is A. 1 liter B. 5 liter C. 15 liter D. 40 liter 6 / 25 6. The quantity of flushing water required for pour – flush water seal latrine is A. 0.5 to 1.5 liters B. 1.5 to 2 liters C. 2 to 3 liters D. 3 to 4 liters 7 / 25 7. The amount of oxygen required for chemical oxidation of organic matter and other reducing agents in the sewer is called? A. COD B. BOD C. COD and BOD D. None of the above 8 / 25 8. The minimum dissolved oxygen required in water to save the aquatic life is A. 1 ppm B. 2 ppm C. 4 ppm D. 8 ppm 9 / 25 9. The standard BOD at 20°C, is taken for the consumption A. 20days B. 15days C. 10days D. 5days 10 / 25 10. The bacteria which requires free oxygen for their survival are called A. Aerobic bacteria B. Anaerobic bacteria C. Facultative bacteria D. None of the above 11 / 25 11. The bacteria which do not requires free oxygen for their survival are called A. Aerobic bacteria B. Anaerobic bacteria C. Facultative bacteria D. None of the above 12 / 25 12. The bacteria with or without free oxygen for their survival are called A. Aerobic bacteria B. Anaerobic bacteria C. Facultative bacteria D. None of the above 13 / 25 13. Sewage is treated by aerobic bacteria action in A. Septic tank B. Settling tank C. Trickling filter D. Oxidation pond 14 / 25 14. As compared to fresh river water, sea water contains oxygen A. 10% less B. 20% less C. 10% more D. 20% more 15 / 25 15. Self-purification of natural streams is caused due to A. Dilution B. Sedimentation C. Oxygen reduction D. All of the above 16 / 25 16. Manholes on sewer lines are provided for A. Periodic cleaning B. Providing air for oxidation C. Removal of part of sewage D. All of the above 17 / 25 17. The main function of manhole is: A. Cleaning of sewer B. Inspection of sewer C. Joining different types of sewer D. Jointing different grade of sewer 18 / 25 18. The working chamber of a manhole, along the direction of flow should have minimum length for depth more than 0.8m: A. 0.6m B. 0.9m C. 1.2m D. 2.4m 19 / 25 19. The manhole is generally provided at each: A. Bend B. Junction C. Change of gradient D. Change of sewer 20 / 25 20. Manhole is said to be deep if its depth is more than: A. 1.5m B. 1.7m C. 1.9m D. 2.1m 21 / 25 21. Manhole is said to be shallow if its depth is less than A. 0.7-0.9m B. 1-1.2m C. 0.8m D. 0.7m 22 / 25 22. Manhole is said to be medium if its depth between A. 0.7-0.9m B. 0.9-1.2m C. 0.9-1.3m D. 0.9-1.5m 23 / 25 23. The minimum diameter of a manhole cover should be A. 25 m B. 50 cm C. 75 cm D. 100 cm 24 / 25 24. A masonry or R.C.C. chamber constructed at suitable intervals along the sewer lines, for providing access into them is called A. Inverted siphons B. Manhole C. Flushing tank D. Clean-outs 25 / 25 25. Inspection arm is provided in A. Manhole B. Drop manhole C. Lamp hole D. Clean out Your score is The average score is 53% 0% Restart quiz Exit civil engineermcqcivilnecpscupsc
