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MCQs

Total Questions : 212 | Page 19 of 22 pages
Question 181. The use of microbes to break down synthetic waste products such as polychlorinated biphenyls is called
  1.    bioremediation
  2.    biolistics
  3.    bioinformatics
  4.    biotechnology
 Discuss Question
Answer: Option A. -> bioremediation
Question 182. Treatment of municipal water supplies is based upon
  1.    coagulation, filtration, chlorination
  2.    filtration, coagulation, chlorination
  3.    chlorination, filtration, coagulation
  4.    coagulation, chlorination, filtration
 Discuss Question
Answer: Option A. -> coagulation, filtration, chlorination
Question 183. Biomass
  1.    is unlikely to be a major source of energy globally
  2.    provides the U.S. with about 50% of its energy
  3.    offers the consumer high quality energy with low environmental impact
  4.    consists largely of wood, animal, and human waste
 Discuss Question
Answer: Option D. -> consists largely of wood, animal, and human waste
Question 184. Iron bacteria can produce
  1.    undesirable odors and tastes
  2.    both (a) and (b)
  3.    extreme acidity
  4.    slime
 Discuss Question
Answer: Option B. -> both (a) and (b)
Question 185. Composting is one of the oldest forms of disposal of waste. It is the natural process of decomposition of organic waste that yields manure or compost. One of the following is added to the compost to get better results?
  1.    Ants
  2.    Worms
  3.    Snakes
  4.    Bugs
 Discuss Question
Answer: Option B. -> Worms
Question 186. Which is not a form of biomass energy?
  1.    Composting to produce methane
  2.    Incineration of solid waste
  3.    Photovoltaic production of hydrogen
  4.    Ethanol and methanol production for auto fuel
 Discuss Question
Answer: Option C. -> Photovoltaic production of hydrogen
Question 187. Oxidation ponds are shallow ponds, generally designed at the depth of
  1.    2 to 40 feet
  2.    4 to 6 feet
  3.    5 to 8 feet
  4.    1 to 3 feet
 Discuss Question
Answer: Option A. -> 2 to 40 feet
Question 188. The acetate-utilizing methanogens are responsible for
  1.    70% of methane produced in a biogas reactor
  2.    85% of methane produced in a biogas reactor
  3.    20% of methane produced in a biogas reactor
  4.    50% of methane produced in a biogas reactor
 Discuss Question
Answer: Option A. -> 70% of methane produced in a biogas reactor
Question 189. Which of the following is generally not referred to the sewerage system?
  1.    Solid sewers
  2.    Storm sewers
  3.    Combined sewers
  4.    Sanitary sewers
 Discuss Question
Answer: Option A. -> Solid sewers
Question 190. The magnitude of BOD of wastewater is related to
  1.    amount of inorganic material
  2.    All of these
  3.    bacterial count
  4.    amount of organic material
 Discuss Question
Answer: Option D. -> amount of organic material

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