Environmental Engineering Mock Test

1. Which system of collection of sewage is a dry system?

2. What is the maximum capacity of medium screen in collecting solids?

3. Which of the following is represented b the green curve in the above figure?

4. is the process in which ground water unfiltrate into the sewers.

5. is the process which indicates the flow of waste water from the sewer into the ground.

6. In which settling type, dilute suspension of particles takes place?

7. What is yellow curve represents in the following figure?

8. Which of the following surface has a maximum Kuichlings impermeability factor?

9. The maximum deficiency of dissolved oxygen is represented by

10. How many types of settling are there in the sedimentation tank?

11. In preliminary treatment of sewage, the operation which takes place, is

12. How many types of aerators are commonly used in the treatment of wastewater?

13. Which of the following represents the oxygen sag curve in the following figure?

14. The detention period of detritus tank is

15. Which reactors are characterized by non- continuous reactions?

16. How is mixing done in SBR?

17. What is the minimum depth of water to be kept in the oxidation pond?

18. What is the shape of the oxidation ditch?

19. In which stage of the SBR is aeration performed?

20. The ditch is lined by layer.

21. SBR is a type of

22. The depth of the filter media of intermittent filter is

23. Which of the following process is not adopted in oxidation ditches?

24. Which of the following filter is used in the anaerobic treatment of sewage?

25. The disposal of sewage from the septic tank is done by which of the following?

26. In which type of settling, sedimentation of discrete particles takes place?

27. The organic loading in low rate trickling filter is 900 kg/hectare- meter/day. What is the efficiency of the filter?

28. How many types of trickling filters are used in sewage treatment?

29. The maximum depth of aeration tank used in activated sludge process is

30. The color of the secondary sludge produced from the high rate trickling filter is

31. Which of the following device is used for the removal of oil and grease?

32. Which is the third zone of pollution in the river?

33. The wet weather flow is also known by

34. In which type of settling, settling of particles takes place by the contact of impurities with each other present in wastewater?

35. Which type of reactor is used for mixing chemicals in water treatment?

36. is the ratio of volume of recirculated sewage to the raw sewage.

37. The settling velocity of spherical particle is given by

38. After how many years, night soil gives good quality manure?

39. Turbidity of water is usually measured in terms of

40. The emission of carbon monoxide in automobile exhaust will be low when the vehicle is

41. Temporary hardness in water in caused by salts like

42. All of the following are pesticides EXCEPT

43. Black holes are celestial bodies which

44. Which system of collection of sewage is called a dry system?

45. The atmosphere gets heated up mainly by

46. The ratio activity of water due to Strontium can be removed by

47. The colour of water is measured

48. The presence of fluorides in drinking water helps in

49. Which of the following plant is highly sensitive to mercury vapour?

50. The presence of which of the following material in water is not considered to be dangerous?

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