Water Supply & Sanitation Engineering Online Test – Paper 2

1. Which traps have perpendicular legs?

2. Where it is not possible to obtain self-cleansing velocities for sewers, flush are provided with the minimum available head of:

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

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

5. Which traps have parallel legs?

6. In the single-stack system of plumbing, the number of vertical pipes is:

7. A G.I. pipe has a coating of

8. 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?

9. The flow in the sewers is minimum during which hours?

10. B-coli tests are conducted to serve as a

11. Mass curve is used for the determination of

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

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

14. During the water test of sewer, 2 lit/cm of dia/km of sewer line may be allowed for a period of:

15. Asbestos pipes are

16. The sewage in an inverted siphon will flow under what condition?

17. The underground structure in the form of a circular or rectangular tank for the purpose of admitting sewerage into it from the intercepting chamber is called:

18. According to the guidelines of DWSS, the maximum number of users in each stand post should be:

19. The ratio of the maximum daily consumption to the average demand is

20. When the fall in elevation is greater than 60cm, the manhole provided is called:

21. By boiling water, hardness can be removed if it is due to:

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

23. The minimum water flow in a tap stand is:

24. Inverted siphon is called:

25. "Puits developee" is generally provided in case of

26. The factor for the selection of the pumping station site is

27. Grit chamber has a detention period of:

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

29. Factors considered in the selection of the site for the intake point are that it should be

30. Most commonly used section in the grade aqueduct is