Discussion
Match each design variable in List I with its principal effect in List II.
List I
A. Exit velocity
B. Gas temperature
C. Stack diameter
D. Physical stack height
List II
1. Buoyant plume rise
2. Momentum rise and downwash avoidance
3. Effective height directly
4. Exit velocity at a given flow
Select the correct match.
Answer: C
Correct answer: A-2, B-1, C-4, D-3
Exit velocity gives momentum rise and avoids downwash (2). Gas temperature drives buoyant rise (1). Diameter fixes the exit velocity at a given flow (4). Physical height contributes to effective height directly (3), metre for metre.
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