Question

Industries which produce smoke and ash should be installed with ___ to minimize air pollution.

• A. electric precipitators
• B. magnetic precipitators
• C. electrostatic precipitators
• D. All of the above

Answer 1

The correct option is C

electrostatic precipitators

The explanation for the correct option:

C: electrostatic precipitators

1. Electrostatic precipitators are used to remove certain impurities like fine dust from the flowing gas.
2. They use the electric charges for the same.
3. It removes particles from a gas stream by using electrical energy to charge particles either positively or negatively.
4. The charged particles are then attracted to collector plates carrying the opposite charge.
5. The collected particles may be washed from the plates with water.

The explanation for the incorrect option:

1. Magnetic precipitators are magnetic filters suitable for gas-borne magnetic particles.
2. There are no products named electric precipitators. They are basically termed electrostatic precipitators.

Hence, Industries that produce smoke and ash should be installed with electrostatic precipitators to minimize air pollution.

Option C is the correct option.