Electrostatic Precipitators are used to control
Air Pollution
Electrostatic Precipitators (ESPs) are pollution-control devices used to control air pollution. Their specific job is to remove suspended particulate matter — fly ash, dust, smoke and soot — from the exhaust gases of industries and thermal power plants before those gases are discharged into the atmosphere.
The working principle is electrostatic. As the dirty gas passes through the unit, high-voltage discharge electrodes impart an electrical charge to the tiny suspended particles. These now-charged particles drift toward oppositely charged collecting plates, stick to them, and are periodically knocked off (rapped) and gathered in hoppers. The cleaned gas, largely free of particulates, then exits — which is why the correct answer is air pollution.
The other options describe pollution types tackled by entirely different technologies: water pollution is treated by effluent and sewage treatment plants, soil pollution is addressed by methods such as bioremediation and soil washing, and noise pollution is reduced using sound barriers, silencers and acoustic insulation. None of these employ an electrostatic precipitator, which acts only on airborne particles.
Correct answer: Air Pollution.
Similar Questions
Give below are two statements:
Statement I : Thermal pollution, usually effluent from cooling systems of power plants or other industries, alters water temperature in a lake or stream.
Statement II : Humans also cause thermal pollution by altering vegetation cover and run-off patterns.
In the light of the above statements, choose the correct answer from the options given below:
Major contributor to carbon monoxide emissions in metropolitan areas of India is/are:
The most important pollutants that cause degradation of water quality in rivers and streams are
(a) Bacteria
(b) Nutrients
(c) Metals
(d) Total dissolved solids
(e) Algae
Choose the most appropriate answer from the options given below:The most dominant source of Benzene emissions in ambient air is
Major sources of oxygen demanding waste in fresh water systems are
(a) Agricultural run-off
(b) Food processing
(c) Ore mining
(d) Sewage effluent
(e) Landfill sites
Choose the correct option from those given below: -
Which of the following pollutant gases is not produced both naturally and as a result of industrial activity?
Which of the following pollutants is the major cause of respiratory diseases?
Assertion (A): In urban areas, smog episodes occur frequently in winters.
Reason (R): In winters, a lot of biomass is burnt by people for heating purposes or to keep themselves warm.
Choose the correct answer from the code given below:
With increase in temperature, the dissolved oxygen content in a water body will:
In the formation of Surface Ozone, which of the following do play an important role?
(a) Oxides of nitrogen
(b) Oxides of sulphur
(c) Sunlight
(d) Carbon monoxide
Choose the correct answer from the code given below:
Important Questions from Pollution
Which of the following isnota common component of photo-chemical smog?
Which of the following is NOT the main objective of Ganga action plan?
Which of the following pollutants causes water pollution ?
Presence of which pathogenic microbe in water is indication of contamination?
Which of the following isnota vehicular pollutant?
