A cement plant must install equipment to remove coarse dust particles larger than about 10 micrometres from flue gases using centrifugal force alone, with low operating cost. The most appropriate device is:

• A Cyclone separator ✓
• B Fabric bag filter
• C Electrostatic precipitator
• D Spray tower wet scrubber

Explanation

C cyclone separator spins the gas stream so that particles are thrown outward against the wall by centrifugal force and slide down into a hopper. It is cheap and effective for coarse particles above roughly 10 micrometres but inefficient for fine particulates. Electrostatic precipitators and bag filters handle fine particles but at higher cost than the scenario demands, while a spray tower relies on wet impingement rather than centrifugal force. Matching device efficiency to particle size decides the answer.

Reference: Park's Textbook of Preventive and Social Medicine, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.