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Pollution Control Technologies MCQs

1. : Which device is most commonly used to control particulate air pollution in industries?

(A) Scrubber


(B) Cyclone separator


(C) Electrostatic precipitator


(D) Fabric filter (Baghouse)




2. : Baghouse filters are mainly used for removing:

(A) Gaseous pollutants


(B) Particulate matter


(C) Carbon monoxide


(D) Lead vapors




3. : Wet scrubbers are most effective in removing:

(A) Sulfur dioxide (SO₂) and particulate matter


(B) Nitrogen gas


(C) Carbon dioxide


(D) Ozone




4. : Which pollution control technology uses an electric field to capture particles?

(A) Venturi scrubber


(B) Cyclone separator


(C) Electrostatic precipitator


(D) Gravity settler




5. : Cyclone separators remove particles primarily through:

(A) Magnetic separation


(B) Centrifugal force


(C) Electrostatic attraction


(D) Filtration




6. : Catalytic converters in vehicles are used to control:

(A) Lead


(B) Noise


(C) Exhaust gases like CO, NOx, and hydrocarbons


(D) Particulate matter




7. : Which of the following is NOT an air pollution control technology?

(A) Bag filters


(B) Scrubbers


(C) Catalytic converters


(D) Septic tanks




8. : Activated carbon filters are commonly used for removing:

(A) Suspended solids


(B) Toxic gases and odors


(C) Heavy metals


(D) Noise pollution




9. : The main principle of adsorption used in pollution control is:

(A) Absorbing liquids


(B) Binding pollutants on the surface of a solid


(C) Neutralizing acids with bases


(D) Mixing pollutants with water




10. : Flue Gas Desulfurization (FGD) is used for controlling:

(A) Nitrogen oxides


(B) Sulfur dioxide


(C) Carbon monoxide


(D) Ozone




11. : The primary method of controlling water pollution from sewage is:

(A) Landfilling


(B) Sedimentation and biological treatment


(C) Noise barriers


(D) Adsorption




12. : Which of the following technologies is used for controlling NOx emissions from power plants?

(A) Selective Catalytic Reduction (SCR)


(B) Bag filters


(C) Carbon absorption


(D) Gravity settling chamber




13. : The principle of a septic tank in wastewater treatment is:

(A) Neutralization


(B) Anaerobic decomposition


(C) Ion exchange


(D) Adsorption




14. : Which method is most suitable for treating hazardous solid waste?

(A) Composting


(B) Incineration


(C) Dilution


(D) Land application




15. : Noise pollution is controlled by:

(A) Bag filters


(B) Catalytic converters


(C) Acoustic barriers and silencers


(D) Cyclone separators




16. : Bioremediation is a pollution control method that uses:

(A) Chemical precipitation


(B) Microorganisms to degrade pollutants


(C) Thermal combustion


(D) Magnetic separation




17. : Reverse osmosis (RO) is widely used in:

(A) Air purification


(B) Noise control


(C) Wastewater treatment and desalination


(D) Incineration of waste




18. : The primary pollutant removed in a trickling filter system is:

(A) Suspended solids


(B) Organic matter (BOD)


(C) Heavy metals


(D) Sulfur dioxide




19. : A gravity settling chamber works best for:

(A) Very fine dust particles


(B) Large, heavy particulate matter


(C) Gaseous pollutants


(D) Carbon monoxide




20. : The technology used for removing arsenic from drinking water is:

(A) Ion exchange and adsorption


(B) Noise barriers


(C) Incineration


(D) Cyclone separator




21. : Landfilling of solid waste requires:

(A) Proper liners and leachate collection systems


(B) Open dumping without treatment


(C) Combustion chambers


(D) Acoustic barriers




22. : Which pollution control method involves changing pollutants into less harmful products through oxidation/reduction?

(A) Catalytic converters


(B) Gravity settling


(C) Baghouse filters


(D) Cyclone separators




23. : Biological oxygen demand (BOD) in wastewater treatment is reduced by:

(A) Aerobic biological treatment


(B) Incineration


(C) Noise suppression


(D) Reverse osmosis only




24. : Which of the following is a limitation of electrostatic precipitators?

(A) Inefficient for very fine particles


(B) High efficiency for dust removal


(C) Can handle large gas volumes


(D) Low-pressure drop




25. : The ultimate goal of pollution control technologies is to:

(A) Eliminate economic growth


(B) Reduce environmental damage and protect public health


(C) Increase waste generation


(D) Focus only on industrial profit




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