Microbiology Of Waste Water(Microbiology ) Questions and Answers

Question 1.  Treatment of municipal water supplies is based upon
  1.    coagulation, filtration, chlorination
  2.    chlorination, filtration, coagulation
  3.    filtration, coagulation, chlorination
  4.    coagulation, chlorination, filtration
Explanation:-
Answer: Option A. -> coagulation, filtration, chlorination
Question 2.  Which of the following is not employed as an oxidation method?
  1.    Oxidation ponds
  2.    Trickling filters
  3.    Contact aerators
  4.    All of these
Explanation:-
Answer: Option D. -> All of these
Question 3.  The filtering medium of trickling filters is coated with microbial flora, known as
  1.    zoological film
  2.    geological film
  3.    zooglocal film
  4.    none of these
Explanation:-
Answer: Option C. -> zooglocal film
Question 4.  The biogas production process takes place at the temperature
  1.    lesser than 25°C
  2.    25-40°C
  3.    45-60°C
  4.    all of these
Explanation:-
Answer: Option D. -> all of these
Question 5.  The concept of putting microbes to help clean up the environment is called
  1.    pasteurization
  2.    bioremediation
  3.    fermentation
  4.    biolistics
Explanation:-
Answer: Option B. -> bioremediation
Question 6.  Advanced treatment is generally used to treat waste water to
  1.    remove coarse solids
  2.    remove settleable solids
  3.    reduce BOD
  4.    remove additional objectionable substances
Explanation:-
Answer: Option D. -> remove additional objectionable substances
Question 7.  
Some cyanobacteria produce potent neurotoxins that, if ingested, will kill humans. These cyanobacteria are most likely to contaminate
  1.    water rich in organic carbon wastes but poor in phosphate
  2.    water that are anoxic
  3.    water rich in phosphate wastes but poor in organic carbon
  4.    none of the above
Explanation:-
Answer: Option C. -> water rich in phosphate wastes but poor in organic carbon
Question 8.  What is an anaerobic digester?
  1.    New diet drink
  2.    Microbe that eats hazardous waste
  3.    Method to convert agricultural waste into a biogas
  4.    All of the above
Explanation:-
Answer: Option C. -> Method to convert agricultural waste into a biogas
Question 9.  The use of microbes to break down synthetic waste products such as polychlorinated biphenyls is called
  1.    bioinformatics
  2.    biolistics
  3.    biotechnology
  4.    bioremediation
Explanation:-
Answer: Option D. -> bioremediation
Question 10. . Activated sludge contains large number of
  1.    bacteria
  2.    yeasts and molds
  3.    protozoa
  4.    all of these
Explanation:-
Answer: Option D. -> all of these
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