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MCQs

Total Questions : 86 | Page 6 of 9 pages
Question 51. Which of the following organisms represent the natural living style as biofilms?
  1.    Microbial communities
  2.    Fungi
  3.    Protozoa
  4.    Animals
 Discuss Question
Answer: Option A. -> Microbial communities
Answer: (a).Microbial communities
Question 52. Which of the following compound is broken down by the microbial biofilms in the waste water?
  1.    Iron
  2.    Nitrogen
  3.    Sodium
  4.    Potassium
 Discuss Question
Answer: Option B. -> Nitrogen
Answer: (b).Nitrogen
Question 53. Pathogens can be removed by action of microbial biofilms.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 54. __________ method is used for water disinfection.
  1.    Chlorination
  2.    Floatation
  3.    Flocculation
  4.    Filtration
 Discuss Question
Answer: Option A. -> Chlorination
Answer: (a).Chlorination
Question 55. Which of following physical methods cannot be used for treatment of waste water?
  1.    Sedimentation
  2.    Floatation
  3.    Filtration
  4.    Chlorination
 Discuss Question
Answer: Option D. -> Chlorination
Answer: (d).Chlorination
Question 56. Which of the following process involves addition of chemical followed by rapid mixing?
  1.    Coagulation
  2.    Sedimentation
  3.    Filtration
  4.    Ultra filtration
 Discuss Question
Answer: Option A. -> Coagulation
Answer: (a).Coagulation
Question 57. The major disadvantage of heterotrophic nitrification is ____________ for final disposal.
  1.    excess sludge generation
  2.    less sludge generation
  3.    presence of oxygen
  4.    presence of carbon source
 Discuss Question
Answer: Option A. -> excess sludge generation
Answer: (a).excess sludge generation
Question 58. Expand OLNAD.
  1.    Oxygen limited nitrification and denitrification
  2.    Oxygen reduced nitrification and denitrification
  3.    Oxygen limited ammonification and denitrification
  4.    Oxygen reduced nitrification and ammonification
 Discuss Question
Answer: Option A. -> Oxygen limited nitrification and denitrification
Answer: (a).Oxygen limited nitrification and denitrification
Question 59. Which of the following method can be used to treat crude sewage and nitrify secondary effluent?
  1.    Duck weed ponds
  2.    Reed beds
  3.    Algal fish ponds
  4.    Water hyacinth pond
 Discuss Question
Answer: Option B. -> Reed beds
Answer: (b).Reed beds
Question 60. Which of the following methods can be used to convert organic pollutants into fish biomass?
  1.    Duck weed ponds
  2.    Reed beds
  3.    Algal fish ponds
  4.    Water hyacinth pond
 Discuss Question
Answer: Option A. -> Duck weed ponds
Answer: (a).Duck weed ponds

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