Environmental Engineering

1. _________ cannot control the noise pollution.

  1. Use of silencers
  2. Green house gases
  3. Vibration damping
  4. Tree plantation
Correct answer: (B)
Green house gases

2. _________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant.

  1. Calcium
  2. Fluorine
  3. Phosphorous
  4. Sulphur
Correct answer: (B)

3. _________ is removed from water by lime-soda process.

  1. Foul smell and taste
  2. Iron and manganese
  3. Temporary hardness
  4. Permanent hardness
Correct answer: (C)
Temporary hardness

4. _________ is the process of killing organism in water.

  1. Coagulation
  2. Sterilisation
  3. Disinfection
  4. Sedimentation
Correct answer: (C)

5. _________ plant emits large amount of SO2 as an air pollutant.

  1. Nitric acid
  2. Sulphuric acid
  3. Chlor alkali
  4. Iron&steel
Correct answer: (B)
Sulphuric acid

6. _________ substances present in sewage are removed in grit chamber during sewage treatment.

  1. Organic
  2. Fatty
  3. Inorganic
  4. Dissolved
Correct answer: (B)

7. Which of the following is a secondary air pollutant?

  1. Photochemical smog
  2. Sulphur dioxide
  3. Nitrogen dioxide
  4. Dust particles
Correct answer: (A)
Photochemical smog

8.'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟?

  1. Dust&mists
  2. Smoke&fumes
  3. Photochemical smog&soot
  4. None of these
Correct answer: (D)
None of these

9.'Pneumoconiosis' is a disease caused by the inhalation of _________ dust.

  1. Coal
  2. Uranium ore
  3. Iron ore
  4. Lime
Correct answer: (A)

10.'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

  1. Industrial chimney exhaust
  2. Automobiles exhaust
  3. Photochemical reaction in polluted atmosphere
  4. Burning of domestic fuel
Correct answer: (B)
Automobiles exhaust
Page 1 of 43