Question

Match the LIST-I with LIST-II 

LIST-I		LIST-II
(Type of Fouling)		(Fouling Mechanism)
A	Precipitation	IV	Precipitation of dissolved substances...
B	Freezing	III	Solidification of Liquid components...
C	Particulate	I	Accumulation of fine particles suspended...
D	Corrosion	II	Heat transfer surface reacts with ambient...

• A. A - II, B - I, C - III, D - IV
• B. A - I, B - III, C - I, D - II
• C. A - IV, B - III, C - I, D - II
• D. A - III, B - IV, C - I, D - II

Hint:

The names of the fouling types are descriptive: \textbf{Precipitation} from dissolved solids, \textbf{Freezing} is solidification, \textbf{Particulate} from suspended particles, and \textbf{Corrosion} is a reaction of the surface itself.

Answer 1

The Correct Option is C

Step 1: Define each type of fouling listed in LIST-I. Fouling is the accumulation of unwanted material on a surface, such as a heat exchanger.
A. Precipitation fouling: Occurs when dissolved substances in the fluid precipitate out of the solution onto the surface, usually due to temperature changes. This directly matches IV. Precipitation of dissolved substances...
B. Freezing fouling: Occurs when a component of the liquid freezes and solidifies onto a subcooled surface. This matches III. Solidification of Liquid components...
C. Particulate fouling: Happens when solid particles suspended in the fluid deposit onto the surface. This matches I. Accumulation of fine particles suspended...
D. Corrosion fouling: Involves a chemical reaction of the surface material itself with the fluid, forming a layer of corrosion products that acts as a fouling layer. This matches II. Heat transfer surface reacts with ambient...
The correct set of matches is therefore A-IV, B-III, C-I, D-II.