Pollution Control Device - MCQs - TNPSC Environmental Scientist
Air Pollution Control Devices – MCQs
Answers are given below ....
1. Which of the following devices is used to remove particulate matter from flue gases using gravitational settling and centrifugal force?A) Electrostatic precipitatorB) Cyclone separatorC) Baghouse filterD) Wet scrubber2. In an electrostatic precipitator, the primary method of removing particles is:A) FiltrationB) Electrostatic attractionC) AbsorptionD) Centrifugation3. Which air pollution control device uses fabric bags to collect fine dust particles?A) ScrubberB) Cyclone separatorC) Electrostatic precipitatorD) Baghouse filter4. Wet scrubbers are most effective in removing:A) Carbon dioxideB) Fine particulate matterC) Volatile organic compoundsD) Gaseous pollutants like SO₂ and NOₓ5. Which of the following is not an air pollution control device for particulate removal?A) Gravity settling chamberB) Cyclone separatorC) Wet scrubberD) Catalytic converter6. The device used in automobiles to reduce carbon monoxide and nitrogen oxides in exhaust gases is:A) Air filterB) Baghouse filterC) Catalytic converterD) Cyclone separator7. Electrostatic precipitators are more efficient for removing particles that are:A) Coarse and heavyB) Sticky and fibrousC) Fine and dryD) Moist and large8. Which of the following factors affects the efficiency of a cyclone separator?A) Gas temperatureB) Flow rate and particle sizeC) Voltage appliedD) Bag material9. A scrubber works on the principle of:A) Centrifugal separationB) Filtration through clothC) Contact between pollutant gas and liquidD) Electrostatic charge10. The term "collection efficiency" in air pollution control devices refers to:A) Amount of air cleaned per hourB) The weight of pollutant removedC) Percentage of pollutants captured from the gas streamD) Volume of gas processed
ANSWERS:
Air Pollution Control Devices – MCQs
1. Which of the following devices is used to remove particulate matter from flue gases using gravitational settling and centrifugal force?A) Electrostatic precipitatorB) Cyclone separatorC) Baghouse filterD) Wet scrubber✅ Answer: B) Cyclone separator2. In an electrostatic precipitator, the primary method of removing particles is:A) FiltrationB) Electrostatic attractionC) AbsorptionD) Centrifugation✅ Answer: B) Electrostatic attraction3. Which air pollution control device uses fabric bags to collect fine dust particles?A) ScrubberB) Cyclone separatorC) Electrostatic precipitatorD) Baghouse filter✅ Answer: D) Baghouse filter4. Wet scrubbers are most effective in removing:A) Carbon dioxideB) Fine particulate matterC) Volatile organic compoundsD) Gaseous pollutants like SO₂ and NOₓ✅ Answer: D) Gaseous pollutants like SO₂ and NOₓ5. Which of the following is not an air pollution control device for particulate removal?A) Gravity settling chamberB) Cyclone separatorC) Wet scrubberD) Catalytic converter✅ Answer: D) Catalytic converter6. The device used in automobiles to reduce carbon monoxide and nitrogen oxides in exhaust gases is:A) Air filterB) Baghouse filterC) Catalytic converterD) Cyclone separator✅ Answer: C) Catalytic converter7. Electrostatic precipitators are more efficient for removing particles that are:A) Coarse and heavyB) Sticky and fibrousC) Fine and dryD) Moist and large✅ Answer: C) Fine and dry8. Which of the following factors affects the efficiency of a cyclone separator?A) Gas temperatureB) Flow rate and particle sizeC) Voltage appliedD) Bag material✅ Answer: B) Flow rate and particle size9. A scrubber works on the principle of:A) Centrifugal separationB) Filtration through clothC) Contact between pollutant gas and liquidD) Electrostatic charge✅ Answer: C) Contact between pollutant gas and liquid10. The term "collection efficiency" in air pollution control devices refers to:A) Amount of air cleaned per hourB) The weight of pollutant removedC) Percentage of pollutants captured from the gas streamD) Volume of gas processed✅ Answer: C) Percentage of pollutants captured from the gas stream
