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(a) Name any two places it is essential to install electrostatic precipitators. Why it is requried to do so?

(b) Mention one limitation of the electrosatic precipitator.                                                           (3)

Explanation:

(a) In thermal power plants, smelters, coal industries or other particulate matter releasing industries.

These type of industries release particulate matter in air. These precipitators are installed to remove this particulate matter.

(b) Limitations of the electrostatic precipitator:

(i) Extremely small particulate matter which is less than 2.5 micrometers in diameter is not  removed.

(ii) Also velocity of air between the plates of the electrostatic precipitator must be low enough to allow dust to fall.

(iii) It works on electicity, hence, electricity consumption is increased.                                      (3)

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