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MCQs

Total Questions : 80 | Page 5 of 8 pages
Question 41. MBBR was developed based on the activated sludge process and _____
  1.    Sedimentation process
  2.    Clarifier process
  3.    Aeration process
  4.    Biofilter process
 Discuss Question
Answer: Option D. -> Biofilter process
Answer: (d).Biofilter process
Question 42. What part of the tank is used by MBBR for biomass growth?
  1.    1/ 4
  2.    1/ 2
  3.    3/ 4
  4.    1/ 1
 Discuss Question
Answer: Option D. -> 1/ 1
Answer: (d).1/ 1
Question 43. The biofilm carrier movement is caused by ________
  1.    Stirring
  2.    Horizontal shaft
  3.    Vertical shaft
  4.    Agitation by air
 Discuss Question
Answer: Option D. -> Agitation by air
Answer: (d).Agitation by air
Question 44. What is the shape of the biofilm carrier?
  1.    Circular
  2.    Rectangular
  3.    Square
  4.    Cylindrical
 Discuss Question
Answer: Option D. -> Cylindrical
Answer: (d).Cylindrical
Question 45. What is the length of the cylinder?
  1.    2 mm
  2.    5 mm
  3.    7 mm
  4.    10 mm
 Discuss Question
Answer: Option C. -> 7 mm
Answer: (c).7 mm
Question 46. What is the diameter of the cylinder?
  1.    5 mm
  2.    7.5 mm
  3.    10 mm
  4.    12 mm
 Discuss Question
Answer: Option C. -> 10 mm
Answer: (c).10 mm
Question 47. What is the standard filling degree of MBBR?
  1.    50%
  2.    55%
  3.    67%
  4.    72%
 Discuss Question
Answer: Option C. -> 67%
Answer: (c).67%
Question 48. What is the retention time considered for aeration tanks in a moving bed bioreactor system?
  1.    4 hrs
  2.    5-6 hrs
  3.    6-8 hrs
  4.    8-12 hrs
 Discuss Question
Answer: Option C. -> 6-8 hrs
Answer: (c).6-8 hrs
Question 49. What is the surface area of the media used in these moving bed bioreactor systems?
  1.    2000 m²
  2.    3000 m²
  3.    200-300 m²
  4.    400-600 m²
 Discuss Question
Answer: Option D. -> 400-600 m²
Answer: (d).400-600 m²
Question 50. What is the BOD removal level for moving bed bioreactor?
  1.    3.5-4.5 Kg BOD/m³day
  2.    2-2.75 Kg BOD/ m³day
  3.    3 Kg BOD/ m³day
  4.    5 Kg BOD/m³day
 Discuss Question
Answer: Option A. -> 3.5-4.5 Kg BOD/m³day
Answer: (a).3.5-4.5 Kg BOD/m³day

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