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Environmental Science MCQs – Practice Test 58 (Chapter 4)

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Download the Environmental Pollution Learning App (Android & iOS): Secondary treatment reduces the BOD, ranges from; MCQ with answers: 40-70%, 20-50%, 70-80%, and 70-95%. Practice Water Pollution Quiz Questions, download Apple Book (Free Chapter) to strengthen laboratory knowledge.

Environmental Pollution MCQ – Practice Test 58 PDF Download

MCQ 286: Where does the combustion of solid waste take place ?

  1. Pyrolysis Reactor
  2. Pyrolysis Chamber
  3. Simple Reactor
  4. Simple chamber

MCQ 287: The secondary treatment reduces the BOD, ranges from:

  1. 20-50%
  2. 40-70%
  3. 70-80%
  4. 70-95%

MCQ 288: 'Trichlorethylene' is less reactive than:

  1. Photochemical smog
  2. Olefins
  3. Ozone
  4. Carbon dioxide

MCQ 289: What causes excessive growth of algae and other aquatic plants?

  1. Waste matters
  2. Organic Nutrients
  3. Inorganic Nutrients
  4. Solid waste

MCQ 290: Addition of hydrogen and removal of oxygen, known as:

  1. Reduction
  2. Oxidation
  3. Suspended solids
  4. Dispersion

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