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Environmental Engineering problems

  • 1. Pick out the one which is not a chemical coagulant.

  • Options
  • A. Aluminium sulphate
  • B. Ferrous sulphate
  • C. Hydrated lime
  • D. Chloramine
    • Discuss
  • 2. Main pollutants released from petroleum refineries is

  • Options
  • A. CO, SO2 & H2S.
  • B. CO2, NO & SO3.
  • C. CO2, H2S & NO2.
  • D. SO3, NO2 & CO2.
    • Discuss
  • 3. Thermal pollution due to excessive heat & temperature in the working place causes

  • Options
  • A. reduction in working efficiency of manpower.
  • B. fatigue.
  • C. high breathing rate.
  • D. all (a), (b) & (c).
    • Discuss
  • 4. Green house effect is accentuated by

  • Options
  • A. deforestation.
  • B. rapid industrialisation.
  • C. increased transportation activity.
  • D. all (a), (b) and (c).
    • Discuss
  • 5. Radioactive substances present in the polluted water stream can be removed by

  • Options
  • A. biological oxygen treatment.
  • B. coagulation and filtration.
  • C. adsorption in ion exchange materials.
  • D. none of these.
    • Discuss
  • 6. The major reason of hydrodynamic noise (i.e., noise resulting from liquid flow) is

  • Options
  • A. pipe vibrations.
  • B. cavitation.
  • C. boundary layer separation.
  • D. fluctuation in liquid flow.
    • Discuss
  • 7. High noise level in a chemical plant can be controlled by the

  • Options
  • A. suppression of noise at the source itself.
  • B. path control of noise.
  • C. protection of operating personnel.
  • D. all (a), (b) & (c).
    • Discuss
  • 8. Higher concentration of CO2 in atmosphere

  • Options
  • A. allows visible solar radiation (ultraviolet) of short wave-length to pass through.
  • B. reflects and absorbs the longer wavelength (infra-red) radiations.
  • C. prevents solar heat being radiated out completely, resulting in 'heat trap' i.e., global warming.
  • D. all (a), (b) and (c).
    • Discuss
  • 9. Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as

  • Options
  • A. photochemical smog.
  • B. peroxy acetyl nitrate (PAN) or methyl nitrile.
  • C. benzopyrene.
  • D. poly acrylonitrile
    • Discuss
  • 10. The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria.

  • Options
  • A. anaerobic
  • B. saphrophytic
  • C. aerobic
  • D. parasitic
    • Discuss

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