An electrostatic precipitator is primarily used in air-pollution control to remove:
Correct answer: B. Particulate matter from industrial exhaust gases
- A. Dissolved organic matter from wastewater
- B. Particulate matter from industrial exhaust gases
- C. Pathogens from treated drinking water
- D. Carbon dioxide from ordinary ventilation air
Explanation
An electrostatic precipitator electrically charges particles and collects them on oppositely charged plates. It is mainly a particulate-control device, not a conventional treatment unit for wastewater or pathogens.
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Environmental engineering examines water supply, water quality, treatment processes, wastewater collection and treatment, solid waste management, air pollution and public health protection. It covers sedimentation, coagulation, filtration, disinfection, biological treatment and disposal methods, while distinguishing drinking-water treatment from sewage treatment and BOD from COD.
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