Water Supply & Sanitation Engineering Online Test – Paper 2

1. The detention time in a septic tank is usually:

2. Pick up the correct statement:

3. Per capita water demand is calculated in liters

4. Choose the odd statement:

5. 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?

6. "A right-angled sleeve (valve) connected in the water main through which water is tapped for domestic supply is called:

7. In the partially ventilated single-stack system of plumbing, the number of vertical pipes is:

8. A structure constructed to remove obstacles in the sewer is known as:

9. Grade aqueducts are not allowed to run

10. In water analysis, the test carried out is

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

12. The clarigesters are:

13. Abyssinian tube well is a special type of

14. The gradient to be provided for sewers depends upon:

15. Widely used pipe for rural water supply in Nepal is:

16. The commonly used material for water supply pipes having the property of not easily corroded, strong, long life but heavy and brittle is

17. Sewer preferred for a combined system of sewage is:

18. The sewage consists of water:

19. Nahni trap is made of:

20. Excess concentration of magnesium salts in water causes

21. The types of diseases caused due to the lack of water are known as

22. Computation of discharges is difficult for:

23. Most common sources of water in hill and terai in our country are...respectively.

24. Inverted siphon is called:

25. For areas of distributed rainfall throughout the year with less intensity, the suitable system of sanitation is:

26. The bacteria which can survive with or without oxygen is known as...

27. Sanitary sewage means:

28. The factor to be considered for the source of water supply is:

29. Advantage of pressure conduits is

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