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MCQs

Total Questions : 86 | Page 9 of 9 pages
Question 81. Absorbing oxygen from the air and pollutants from the wastewater can be decomposed aerobic microorganisms by which of the following methods?
  1.    High rate bio filters
  2.    Conventional bio filters
  3.    Percolating filter
  4.    Rotating biological contractors
 Discuss Question
Answer: Option D. -> Rotating biological contractors
Answer: (d).Rotating biological contractors
Question 82. Which of the following is low energy consuming system for waste water treatment?
  1.    Biological wave contractor
  2.    Rotating biological contractors
  3.    High rate bio filters
  4.    Conventional bio filters
 Discuss Question
Answer: Option A. -> Biological wave contractor
Answer: (a).Biological wave contractor
Question 83. Amino nitrogen and heterocyclic nitrogen can be degraded by biological method by first converting it into ______________
  1.    Ammonia
  2.    Nitrate
  3.    Sulphate
  4.    Carbon dioxide
 Discuss Question
Answer: Option A. -> Ammonia
Answer: (a).Ammonia
Question 84. Which of the following is the main source for eutrophication of surface water?
  1.    Nitrogen
  2.    Calcium
  3.    Magnesium
  4.    Potassium
 Discuss Question
Answer: Option A. -> Nitrogen
Answer: (a).Nitrogen
Question 85. Which of the following process is not involved in the removal of nitrogen?
  1.    Nitrification
  2.    Ammonification
  3.    Denitrification
  4.    Desalination
 Discuss Question
Answer: Option D. -> Desalination
Answer: (d).Desalination
Question 86. ___________ is a natural method of waste water treatment.
  1.    Chemical method
  2.    Physical method
  3.    Water hyacinth pond
  4.    Rotating biological contractors
 Discuss Question
Answer: Option C. -> Water hyacinth pond
Answer: (c).Water hyacinth pond

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