Water Supply & Sanitation Engineering Online Test – Paper 2

1. 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

2. Infiltration gallery is a

3. Designation of GI pipe is done with:

4. A communicable disease is

5. Digesters are used for:

6. Disinfection of water involves.....

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

8. When the limiting non-scouring velocity is 5 m/sec, the type of sewer generally used is:

9. Turbidity is the ability of water to

10. Turbidity of water is measured in

11. Sewage is treated by aerobic bacteria action in:

12. For a 150mm diameter sewer, the gradient required to generate self-cleaning velocity is:

13. The ratio of maximum to average sewage flow for mains up to 1 m in diameter is usually:

14. The valve provided at low points of the pipe to drain off water quickly under gravity is

15. A sewer, which receives the discharge of a number of house sewers, is called:

16. Which metal is good for keeping drinking water?

17. Per capita water demand is calculated in liters

18. Time of concentration depends upon:

19. A heavy metal having non-toxic property

20. The standard BOD at 20°C is taken for the consumption in:

21. The suitable system of sanitation for an area having rainfall for only one season is:

22. If you have to design a simple water filtration unit for a community water supply system in Biratnagar, which type of filter will you choose in general?

23. Goitre is due to

24. What will happen if an induction motor pump is run under significantly low voltage continually?

25. Septic tank is provided for:

26. The maximum diameter of a sewer pipe should preferably be:

27. Which is in the correct order?

28. A pressure conduit laid underground may not be subjected to

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

30. 2 ml of sewage, having BOD-500 mg/l, is diluted to 200 ml, and incubated for 5 days at 20°C. If the D.O. content after 5 days is found to be 5 mg/l, what was the initial D.O. content of the diluted sample?