Air Pollution MCQ – Environmental Engineering

131. Which of these is NOT a nature of generally used chlorofluorocarbons?

  1. Reactive
  2. Odourless
  3. Non-corrosive
  4. Non-flammable
Answer. c

132. Which of these produces dangerous photochemical smog?

  1. Lead
  2. Benzene
  3. Carbon Monoxide
  4. Hydrocarbons
Answer. d

133. Which one of the following gases plays a decisive role in affecting the climate of the earth?

  1. Carbon dioxide
  2. Nitrogen
  3. Hydrogen
  4. Oxygen
Answer. a

134. Which one of the following is not present in the acid rain?

  1. HNO3
  2. H2SO4
  3. H2CO3
  4. CH3COOH
Answer. d

135. Reinluft process is used for

  1. desulphurization of flue gas
  2. de-removing carbon from flue
  3. checking atmospheric pollution
  4. none of these
Answer. a

136. The intensity of air pollution is found to be the highest during

  1. monsoon
  2. summer
  3. spring
  4. winter
Answer. d

137. Cyclones are used for cleaning air by separation of

  1. many types of dust
  2. fine metallurgical fumes
  3. organic vapors
  4. organic sulphides
Answer. a

138. Major source of carbon monoxide pollution is

  1. Water
  2. Trees
  3. Sunlight
  4. Automobiles
Answer. d

139. Thermal power plants mostly produce

  1. SO2
  2. CO
  3. PAN
  4. NO2
Answer. a

140. Higher efficiency for removal of SPM less than 1 μm can be achieved with

  1. ESP
  2. Bag Filter
  3. High-efficiency cyclone
  4. Spray tower wet scrubber
Answer. a

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