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MCQs

Total Questions : 86 | Page 4 of 9 pages
Question 31. Autotrophic nitrification leads to formation of nitrate by conversion of ammonia.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 32. The optimal removal of phosphate by biological method should have a COD/P ratio of 20g COD/g of phosphate.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 33. Ferrous ions can supplement biological phosphate removal.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 34. Which of the following genera the nitrifying bacteria doesn’t belong to?
  1.    Nitrosomonas
  2.    Nitrosococcus
  3.    Nitrosospira
  4.    Pseudomonas
 Discuss Question
Answer: Option D. -> Pseudomonas
Answer: (d).Pseudomonas
Question 35. Which of the following is not an after effect of accumulation of nitrogen and phosphorus in aquatic ecosystem?
  1.    Adverse health conditions
  2.    Algal blooms
  3.    Increase in water quality
  4.    Reduction in marine life
 Discuss Question
Answer: Option C. -> Increase in water quality
Answer: (c).Increase in water quality
Question 36. The water released after use by the domestic and industrial sectors is called as ________
  1.    waste water
  2.    ground water
  3.    salty water
  4.    pure water
 Discuss Question
Answer: Option A. -> waste water
Answer: (a).waste water
Question 37. The release of untreated water into the surface water causes deterioration of water quality and its ________
  1.    volume
  2.    temperature
  3.    lipophilicity
  4.    biological characteristics
 Discuss Question
Answer: Option D. -> biological characteristics
Answer: (d).biological characteristics
Question 38. Which of the following parameters of the water is not altered after its use?
  1.    Physical
  2.    Chemical
  3.    pH
  4.    Volume
 Discuss Question
Answer: Option D. -> Volume
Answer: (d).Volume
Question 39. Which of the following is not caused as a result of the altered primary productivity of water bodies?
  1.    Algal blooms
  2.    Adverse health effects
  3.    Reduction in water quality
  4.    Increase in water quality
 Discuss Question
Answer: Option D. -> Increase in water quality
Answer: (d).Increase in water quality
Question 40. The diversity of life forms of the water bodies gets affected by the untreated waste water.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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