Water Supply & Sanitation Engineering Online Test – Paper 2

1. The slope of the hydraulic grade line is always towards the well due to pumping. This line of depressed water table is called

2. A structure constructed where self-cleaning velocity is not developed to prevent choking is called:

3. The sewer meant to carry excess discharge from an existing sewer is called:

4. In an egg-shaped sewer section, the maximum discharge occurs when the depth of flow is: (where d is the total depth of the section)

5. Pump efficiency is 85%, motor efficiency is 94% then the combined efficiency of the two is

6. The type of joint used in joining the plain ends of cast-iron pipes is

7. Suitable sewer section for both combined and separate systems is:

8. Kidney damage may be caused due to excess concentration of

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

10. The valve which allows water to flow in one direction but prevents its flow in the reverse direction is

11. The average discharge of a tube-well is about

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

13. To compensate for losses, thefts, and wastage of water, an allowance made of (as per NWSC)

14. If in the relative stability test on sewage, the period of incubation at 20°C is 15 days, the relative stability is:

15. Inverted siphon is called:

16. Gravity water supply system starts from

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

18. An advantage of the intermittent system of the water supply system:

19. Mass action' during sedimentation is the property of:

20. Aqueducts are generally not designed in

21. Most suitable section of sewer in a separate sewage system is:

22. "Dental Caries" will be absent where the following is present

23. Abyssinian tube well is a special type of

24. The head developed in a centrifugal pump, at zero discharge is known as

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

26. Source of water in the mountains is:

27. The aquifer having the least water-bearing capacity is

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

29. Ovoid sewers are best suited for:

30. In the one-pipe system of plumbing, the number of vertical pipes is: