A cottrell precipitator makes use of the ______________ for dusty air cleaning?
Correct answer: B. Corona discharge
- A. Electric spark
- B. Corona discharge
- C. Alternating current
- D. None of these
Explanation
A Cottrell precipitator charges dust particles by corona discharge and then collects them on oppositely charged electrodes. An electric spark is uncontrolled and is not the intended cleaning mechanism.
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