Fouling factor must be included in the calculation of overall design heat transfer coefficient, when the liquid__________________?
Correct answer: A. Containing suspended solids flows at low velocity
- A. Containing suspended solids flows at low velocity
- B. Containing suspended solids flows at high velocity
- C. Is highly viscous
- D. Is of high specific gravity
Explanation
Suspended solids deposit more readily when liquid velocity is low, adding thermal resistance and requiring a fouling factor in design. High velocity generally reduces deposition by increasing shear and turbulence.
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