Water Supply & Sanitation Engineering Online Test – Paper 3

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Created by 83a36dcfd5c4caff12bc80f0020c9c749e12cbbbdb7c406dc1dd39996cb85836?s=32&d=monsterid&r=g gkaimVikash chaudhary

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  • Total Questions: 50
  • Time Allotted: 50 minutes
  • Passing Score: 70%
  • Randomization: Yes
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1. A flight sewer is provided when the gradient is:

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

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3. Clean out is provided in the underground......sewer in place of manhole.

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4. Which one is a waterborne disease?

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5. The water supply system whose main, sub-main, and branches are interconnected with each other is:

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6. Thrash rack/roughing filter is provided at the entrance of

7 / 50

7. If the diameter of the main pipe is taken less than the economical diameter, then

8 / 50

8. The minimum diameter of a sewer pipe should be:

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9. Sewage is treated by aerobic bacteria action in:

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10. Sewerage system is designed for:

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11. The open channels supported above the ground over trestles are called

12 / 50

12. Depth of shallow tube well shall not be more than (considering economic point)

13 / 50

13. Highly colored waters are

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

15 / 50

15. Gravity conduits

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16. The disinfection efficiency of chlorination

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17. Minimum depth of infiltration gallery is

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18. The highest non-scouring velocity in a sewer may be allowed in:

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

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20. The hourly variation factor is generally taken

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

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22. The valve provided on the suction pipe in a tube-well is

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

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

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25. Septic tanks are best suited for:

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26. A sanitary sewer is expected to run:

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

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28. Gastrointestinal irritation is produced because of excess of the following in water

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29. Depth of shallow tube well shall not be more than (considering economic point):

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30. Drop manholes are provided on sewers in:

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31. The maximum amount of copper in domestic water should be

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32. A 1 m cast iron pipe carries a discharge of 0.785 cum/sec, the velocity of flow will be

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

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34. A sewer, which gets its flow from a number of transverse sewers, is known as:

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35. The types of joint not used to resist shock, vibration, etc. is

36 / 50

36. Aeration of water is done by

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37. The process of obtaining energy for their (bacteria) synthesis after the oxidation of organic or inorganic matter is called

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

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39. The quantity of flushing water required for pour-flush water seal latrine is:

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40. Strainer type tube wells are considered unsuitable for

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41. If the head of water is more than 100 m then the type of pipe used is

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42. Gravity water supply system starts from

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43. 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:

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

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45. A tube well of 38cm diameter has depths before and after pumping at 10.7 m and 4.60, respectively. The coefficient of permeability is 2273 liters per day. If the radius of the circle of influence is 304.8m. The yield from the tube well will be

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46. Designation of GI pipe is done with:

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47. The type of joint generally used in cast-iron pipes is

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48. The diameter of pipes in bathrooms and lavatories in domestic water supply is:

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49. Purest water may have

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50. In the above problem 151, using Manning's formula with n = 0.014 then the hydraulic gradient will be

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