Environmental Issues
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The meaning of BOD is :
  • Bacterial oxygen demand
  • Biological optimum density
  • Biochemical oxygen demand
  • Bioorganisation decay

C.

Biochemical oxygen demand
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    Smog is a mixture of  :
    • Aluminium ions
    • Methane and ozone
    • smoke and fog
    • water and smoke
    Answer
    Which of the following pollutants is not produced by exhaust of motor vehicles ?
    • CO
    • Hydrocarbon
    • Fly-ash
    • NO
    Answer
    What is the term for the inflammation of cornea due to high absorption of UV-B radiation :
    • myopia
    • snow blindness
    • biomagnification
    • None of the above
    Answer
    WHO’s recommendations about the industrial noise limit is of :
    • 105 dB
    • 75 dB
    • 135 dB
    • 165 dB
    Answer
    First 2 3 4 Last
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