Discussion
Statement I: A cyclone with a smaller body achieves a smaller cut diameter.
Statement II: A smaller radius gives a greater centrifugal acceleration at the same tangential velocity.
In the light of the above statements, choose the correct answer.
Answer: D
Correct answer: Both Statement I and Statement II are correct
Both are true and the second explains the first. Centrifugal acceleration is \( v^2/r \), so reducing the radius at the same tangential velocity increases the force driving particles to the wall, and smaller particles can be captured. Hence the multiclone: many small cyclones in parallel achieve a far smaller cut diameter than one large one. The penalty is a higher pressure drop.
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