Agricultural Engineering MCQ Quiz Hub

1. Which of the following factors doesn’t influence biological treatment efficiency?
Surface area
Void space
Drainage
High BOD

2. Which of the following has the potential to ‘rough’ high strength industrial effluents prior to sewage discharge?
High rate bio filters
Conventional bio filters
Percolating filters
Rotating biological contractors

3. Rotating biological contractors is used for carbonaceous oxidation as a ________
High rate bio filters
Conventional bio filters
Roughing filter
Filter cake

4. Organic overloading is a major problem associated with Rotating biological contractors.
True
False

5. Absorbing oxygen from the air and pollutants from the wastewater can be decomposed aerobic microorganisms by which of the following methods?
High rate bio filters
Conventional bio filters
Percolating filter
Rotating biological contractors

6. Up flow anaerobic sludge blanket reactor is an anaerobic digester which is used for wastewater treatment with the help of suspended sludge blanket filters.
True
False

7. Activated sludge is a type of wastewater treatment method for the treatment of sewage or industrial wastewaters using aeration and a microbial floc.
True
False

8. Which of the following is low energy consuming system for waste water treatment?
Biological wave contractor
Rotating biological contractors
High rate bio filters
Conventional bio filters

9. ___________ is a natural method of waste water treatment.
Chemical method
Physical method
Water hyacinth pond
Rotating biological contractors

10. Which of the following method can be used to treat crude sewage and nitrify secondary effluent?
Duck weed ponds
Reed beds
Algal fish ponds
Water hyacinth pond

11. Duck weed can grow profusely in nutrient rich waste water.
True
False

12. Which of the following methods can be used to convert organic pollutants into fish biomass?
Duck weed ponds
Reed beds
Algal fish ponds
Water hyacinth pond

13. The bacterial biofilms and floating weeds interact in duckweed ponds resulting in decrease of nutrient load and _______ in waste water.
Organic pollutant
Fish biomass
Oxygen
Water

14. The hollow rhizomes of the reeds generate a hydraulic pathway thereby treating sewage by ___________
Flocculation
Bacterial activity
Precipitation
Sedimentation

15. Which of the following factors doesn’t need to be considered in order to make the system of nutrient removal cost effective?
Waste water type
Space
Production rate
Water volume

16. __________ method can be used for enhancing the performance of waste stabilization ponds.
Water hyacinth pond
Reed beds
Duck weed ponds
Algal fish ponds

17. Algal fish ponds require artificial aeration.
True
False

18. What is the method of treatment used when the TSS in the sample is high?
Ultrafiltration
High rate solid contact clarifier
Pressure Sand filter
Activated Carbon filter

19. Which type of treatment does clarification fall in?
Secondary treatment
Primary treatment
Preliminary treatment
Tertiary treatment

20. Which of these remove coarse materials?
Coarse screen
Grit chamber
Fine screen
Commutors

21. Which type of treatment is the coarse screen?
Preliminary treatment
Primary treatment
Secondary treatment
Tertiary treatment

22. Tube settlers are classified as which type of treatment?
Tertiary treatment
Secondary treatment
Preliminary treatment
Primary treatment

23. Activated Carbon is classified as which type of treatment?
Preliminary treatment
Primary treatment
Secondary treatment
Tertiary treatment

24. Which of these is used to remove odour?
Ultrafiltration
Pressure sand filter
Activated carbon
Nano filter

25. Reverse Osmosis is which type of treatment?
Primary treatment
Preliminary treatment
Secondary treatment
Tertiary treatment

26. Which is usually prior to reverse osmosis?
Ultrafiltration
Activated carbon filter
Clarifier
Tube settler

27. What does zero discharge actually refer to?
There is zero discharge of ions
The reject is recycled from every part of the treatment plant
The reject is not rejected out. Influent equals effluent
100 percent efficient plant

28. What is the size of the small rapid sand filter bed?
50 sqm
80 sqm
100 sqm
120 sqm

29. Pre-treatment of beds is not necessary.
True
False

30. What is the percentage of bacterial removal in filter beds?
60-70 %
75-80 %
80-90 %
90-99 %

31. What is the effective size of sand used in rapid sand filters?
0.2-0.3 mm
0.3-0.6 mm
0.6-1.2 mm
12-2.4 mm

32. What is the head loss found in a rapid sand filter?
<3
>3
0
<4

33. What is the surface wash rate?
5-6 cum/sqm h
6-7 cum/sqm h
8-10 cum/sqm h
10-12 cum/sqm h

34. What is the porosity range during expansion of the filter bed?
0.4-0.5
0.5-0.6
0.1-0.2
0.68-0.7

35. Even by high-rate of backwash, efficiency of cleaning is poor.
True
False

36. What is the air scour rate which is provided before a water backwash?
12 cum/ sqm h
15 cum/ sqm h
20 cum/ sqm h
27 cum/ sqm h

37. What is the depth of washing during high-rate water backwash?
3-4 mm
3-6 mm
2-3 mm
1-2 mm

38. What does sand filter remove?
TDS
TSS
BOD
COD

39. What is the TSS at the outlet of the Pressure Sand Filter (PSF)?
<10 ppm
25 ppm
100 ppm
>150 ppm

40. While designing a sand filter what is the velocity that is assumed?
10-12 m/h
15 m/h
20 m/h
30 m/h

41. While designing a dual media filter what is the velocity that is assumed?
10-12 m/h
15-18 m/h
20 m/h
30 m/h

42. While designing a multimedia filter what is the velocity that is assumed?
10-12 m/h
15-18 m/h
18-20 m/h
30 m/h

43. In which of the following filters, the rate of filtration is highest?
Slow sand filter
Rapid sand filter
Pressure filter
Roughing filter

44. The final loss of head in slow sand filter is ______ than rapid sand filter.
Higher
Lower
Slightly Lower
Equivalent

45. The turbidity of water applied to rapid sand filter is less than _______
35-40ppm
10-20ppm
30-40ppm
10-15ppm

46. The period of cleaning of a slow sand filter is ______ than rapid sand filter.
Smaller
Larger
Slightly smaller
Slightly larger

47. The bacterial removal efficiency of the rapid sand filter is ______ in comparison to slow sand filter.
More
Less
Equal
Better

48. How is the grain size distribution of sand in rapid sand filter?
Stratified
Unlayered
Layered with heaviest grains at the top
Layered with lightest grains at the top

49. Consider the following statement. i. The penetration of suspended matter is deep in the slow sand filter ii. The penetration of suspended matter is superficial in the rapid sand filter iii. Coagulation is not required in the slow sand filter Which of the above statement is/are correct?
Only iii
i, ii
i, ii, iii
ii, iii

50. The filter run in rapid sand filter should not be less than _____ hours.
1
6
12
24