Question

Arrange the following devices in increasing order of particulate collection efficiency for fine particles: \[ \begin{aligned} A.&\ \text{Gravity settling chamber}\\ B.&\ \text{Cyclone separator}\\ C.&\ \text{Electrostatic precipitator} \end{aligned} \]

• A. \(A\lt C\lt B\)
• B. \(A\lt B\lt C\)
• C. \(B\lt A\lt C\)
• D. \(A\gt B\gt C\)

Hint:

Increasing collection efficiency: \[ \boxed{ \text{Gravity Chamber} \lt \text{Cyclone} \lt \text{ESP} \lt \text{Fabric Filter} } \]

Answer 1

The Correct Option is B

For fine particulate matter: - Gravity settling chambers remove only coarse particles. - Cyclone separators are more efficient than settling chambers. - Electrostatic precipitators (ESPs) provide the highest efficiency, especially for fine and sub-micron particles. Thus, the increasing order of collection efficiency is \[ \boxed{ \text{Gravity Settling Chamber} \lt \text{Cyclone Separator} \lt \text{Electrostatic Precipitator} } \] Therefore, \[ \boxed{A\lt B\lt C} \] Hence, \[ \boxed{(B)} \]