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MCQs

Total Questions : 212 | Page 18 of 22 pages
Question 171. Tuberculosis brucellosis is caused by the pathogen from an infected cow.
  1.    True
  2.    False
  3.    May be
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 172. Which among the following group of microorganisms are found in the ducts of cow’s mammary glands?
  1.    Coliforms
  2.    Lactobacilli
  3.    Micrococci
  4.    Microbacteria
 Discuss Question
Answer: Option C. -> Micrococci
Answer: (c).Micrococci
Question 173. The concept of putting microbes to help clean up the environment is called
  1.    pasteurization
  2.    bioremediation
  3.    biolistics
  4.    fermentation
 Discuss Question
Answer: Option B. -> bioremediation
Question 174. Some cyanobacteria produce potent neurotoxins that, if ingested, will kill humans. These cyanobacteria are most likely to contaminate
  1.    water rich in phosphate wastes but poor in organic carbon
  2.    water that are anoxic
  3.    water rich in organic carbon wastes but poor in phosphate
  4.    None of these
 Discuss Question
Answer: Option A. -> water rich in phosphate wastes but poor in organic carbon
Question 175. Which of the following is not employed as an oxidation method?
  1.    All of these
  2.    Trickling filters
  3.    Oxidation ponds
  4.    Contact aerators
 Discuss Question
Answer: Option A. -> All of these
Question 176. The filtering medium of trickling filters is coated with microbial flora, known as
  1.    zooglocal film
  2.    geological film
  3.    none of these
  4.    zoological film
 Discuss Question
Answer: Option A. -> zooglocal film
Question 177. The biogas production process takes place at the temperature
  1.    45-60°C
  2.    25-40°C
  3.    lesser than 25°C
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 178. Advanced treatment is generally used to treat waste water to
  1.    reduce BOD
  2.    remove settleable solids
  3.    remove coarse solids
  4.    remove additional objectionable substances
 Discuss Question
Answer: Option D. -> remove additional objectionable substances
Question 179. Activated sludge contains large number of
  1.    yeasts and molds
  2.    all of these
  3.    protozoa
  4.    bacteria
 Discuss Question
Answer: Option B. -> all of these
Question 180. What is an anaerobic digester?
  1.    Method to convert agricultural waste into a biogas
  2.    Microbe that eats hazardous waste
  3.    New diet drink
  4.    All of these
 Discuss Question
Answer: Option A. -> Method to convert agricultural waste into a biogas

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