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Preventive Measures — Geography STD 9 — Question

ICSE BoardEnglish MediumSTD 9GeographyPreventive Measures2 Marks
Question
What purpose does an electrostatic precipitator serve?
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Answer

It is a device which removes unwanted chemicals from smoke after combustion takes place. The negatively charged dust particles are drawn towards the positively charged particle's collector surface and, by knocking the plates, particles fall into a hopper tray for disposal.

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