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MCQs

Total Questions : 43 | Page 5 of 5 pages
Question 41. . 
__________ is an environment like __________ where microorganisms are functioning in an extremely thin film of water and where oxygen-containing air is close to them.
  1.    low oxygen diffusion environment; soils
  2.    high oxygen diffusion environment; soils
  3.    low oxygen diffusion environment; lakes
  4.    high oxygen diffusion environment; lakes
 Discuss Question
Answer: Option B. -> high oxygen diffusion environment; soils
Question 42. . Trickling filter comes under
  1.    primary treatment
  2.    secondary treatment
  3.    tertiary treatment
  4.    none of these
 Discuss Question
Answer: Option B. -> secondary treatment
Question 43. . Which of the following species in water reveal the presence of fecal pollution of human or animal origin?
  1.    E.coli
  2.    Fecal Streptococci
  3.    Clostridium perfringens
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these

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