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