Air Pollution MCQ – Environmental Engineering

51. Which of the following is not a type of aerator?

1. Gravity aerator
2. Fountain aerator
3. Diffused aerator
4. Electrical aerator

52. Air pollution disasters in India usually take place during which season of the year?

1. Winter
2. Summer
3. Monsoon
4. Pre-monsoon

53. What is the most common source of acidity in water?

1. Sulphuric acid
2. Oxygen
3. Nitrogen
4. Carbon dioxide

54. Acid rains result out of excessive

1. NO and O₃
2. SO₂ and NO
3. CO and CO
4. CO₂ and O₃

55. One of the main effects of greenhouse is

1. reduced vegetation
2. increased vegetation
3. no effect on vegetation
4. depletion of vegetation

56. According to Central Pollution Control Board, the annual concentration of Sulphur Dioxide (SO₂) in ambient air at ecologically sensitive areas shall not exceed _________ μg/m³ on two consecutive days of monitoring.

1. 100
2. 0.5
3. 20
4. 180

57. According to Central Pollution Control Board, the annual concentration of Ozone O₃ in ambient air at ecologically sensitive areas shall not exceed ______________ μg/m³ on two consecutive days of monitoring.

1. 20
2. 180
3. 100
4. 0.5

58. Consider the below statements with respect to Air pollution control:

Dispersion of air pollutants through long chimneys helps in diluting the air pollutants near their source.
Dispersion of air pollutants through long chimneys, reduce long term undesirable effects on the community as a whole.

Identify the correct statement/s.

1. Both statements are true
2. Statement A is true B is false
3. Statement B is true A is false
4. Both statements are false

59. Pick odd one out with respect to type of particulates in suspended matter (air pollutants).

1. Dust
2. Smoke
3. CO
4. Fumes

60. According to Central Pollution Control Board, the 24 hour concentration of Lead (Pb) in ambient air at ecologically sensitive areas shall not exceed ______________ μg/m³ on two consecutive days of monitoring.

1. 1.0
2. 3.0
3. 2.0
4. 5.0