Question: 107: The device which can remove particulate matter present in the exhaust from a thermal power plant is :
(1) Electrostatic Precipitator
(2) Catalytic Convertor
(3) STP
(4) Incinerator
Answer: Option (1)
Explanation:
Thermal power plants release exhaust gases containing particulate matter such as ash and dust.
An electrostatic precipitator is a device used to remove fine particulate matter from exhaust gases.
It works by giving electric charge to the particles and then attracting them to oppositely charged plates.
Catalytic converters are used mainly in automobiles to reduce gaseous pollutants, not particulate matter.
STP refers to sewage treatment plant and is not used for exhaust gas purification.
Incinerators are used to burn waste materials and do not remove particulate matter from exhaust gases.
Therefore, electrostatic precipitator is the correct device for removing particulate matter from thermal power plant exhaust.
Hence, option (1) is the correct answer.