Water Supply & Sanitation Engineering Online Test – Paper 2

1. Excess concentration of sodium salts in water causes

2. The pump does not require any power, energy, fuel, etc., for its working is

3. Manhole is said to be deep if its depth is more than:

4. The rate of flow in an artesian spring is continuous and

5. A lamp hole is helpful in:

6. The water carriage sewage system:

7. After incubating a 2.5% solution of a sewage sample for 5 days at 20°C, the depletion of oxygen was found to be 5 PPM. The BOD of the sewage will be recorded as:

8. Inverted siphon is called:

9. Coefficient of permeability is maximum for

10. The most commonly used coagulant is:

11. The most suitable excreta disposal unit for human excreta is:

12. Thrust blocks are installed wherever there is a

13. The common pipe used in house plumbing is:

14. Manholes on sewer lines are provided for:

15. Garbage dumping home is:

16. A sewer that collects sewage from toilets is called:

17. The approximate diameter of a water mains for supplying 7.15 mld with 1.21 m/sec velocity flow will be

18. If 10 ml of raw sewage is diluted to 250 ml, the dilution factor is:

19. The main pipes must be designed to carry

20. As compared to cast iron pipes, steel pipes are

21. Sanitary sewage means:

22. Self-purification of natural streams is caused due to

23. In distribution pipes, drain valves are provided at

24. A heavy metal having non-toxic property

25. In Chezy's formula v=c√ms for calculating the velocity of flow in a circular sewer, the Chezy's constant c depends upon:

26. Sewage is treated by aerobic bacteria action in:

27. Before entering a manhole, a candle is lowered into the manhole:

28. Laying of a sewer is generally done with the help of:

29. R.M.O. means

30. If p is the population of a place in thousands then the fire demand of water in liters per minute, according to Kuichling formula, is given by