Air Pollution MCQ – Environmental Engineering

41. Ozone layer in the upper atmosphere is getting destroyed owing its reaction with pollutant like

  1. Hydrogen peroxide
  2. Carbon monoxide
  3. Volatile organic acids
  4. Chlorofuoro carbons
Answer. d

42. Which of the following air pollutants causes irritation of the eye?

  1. Photo-chemical oxidants
  2. Ozone
  3. Carbon monoxide
  4. Sulphur oxides
Answer. b

43. Which of the following compound in air can harm plants?

  1. sulphur dioxide
  2. hydrogen fluoride
  3. ozone
  4. smog
Answer. a

44. Smaller pollutants that can be seen in air are of size not less than

  1. 0.1 μm
  2. 1.0 μm
  3. 10.0 μm
  4. 100.0 μm
Answer. b

45. According to Bharat Stage IV norms, air pollutants which are monitored for petrol-driven vehicles are

  1. SO2, NOx
  2. NOx, PM
  3. HC, NOx
  4. CO, HC
Answer. b

46. Aerosols are defined as

  1. finely divided liquid droplets or solid particle capable of remaining suspended in air
  2. toxic gases
  3. solid particles
  4. non-toxic gases
  5. finely divided liquid droplets only
Answer. a

47. SO2 and CO adversely affect

  1. oxygen carrying capacity of blood and functioning of lungs respectively
  2. functioning of the respiratory system and brain respectively
  3. functioning of the respiratory system and oxygen carrying capacity of blood respectively
  4. functioning of air passages and chest respectively
Answer. c

48. When the Adiabatic Lapse Rate (ALR) is more than Environment Lapse Rates (ELR), then the ELR can be called as

  1. super adiabatic lapse rate
  2. sub adiabatic lapse rate
  3. dry adiabatic lapse rate
  4. wet adiabatic rate
Answer. b

49. Nitrous Oxide (N2O) traps ___________ times more heat than Carbon dioxide (CO2).

  1. 70
  2. 310
  3. 140
  4. 230
Answer. b

50. Which of the following air pollution control equipment is not used for removal of particulate matter from the air?

  1. Cyclones
  2. Adsorbers
  3. Scrubbers
  4. Electrostatic Precipitators
Answer. b
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