With increase in the mass velocity of the gas, the rate of drying during the constant rate period ______________, if the conduction and radiation through the solid are negligible ?
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remain same
- D. Increases linearly
Explanation
During the constant-rate period, surface moisture evaporates and the rate is controlled mainly by external gas-side transfer. Increasing gas mass velocity improves this transfer and raises the drying rate, although not necessarily linearly.
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