20
Which factor affects the drying time in dehydrating equipment for fish?
(A) Ambient temperature
(B) Fish size & species
(C) Humidity level
EXPLANATION
Salting, Drying & Water Activity Principles
- Factors Influencing Fish Dehydration & Drying Kinetics:
- Ambient Temperature: Higher dry-bulb air temperatures increase water vapor pressure gradients and enhance internal moisture diffusion rates.
- Fish Size & Species: Thickness, surface area-to-volume ratio, skin permeability, and lipid content (lean vs. fatty fish) determine internal mass transfer resistance.
- Humidity Level: Low relative humidity of drying air increases the drying driving force (drying potential), accelerating surface water evaporation.
- All three factors (A, B, and C) directly determine drying time in mechanical dryers.
- Correct Option: Option 2 ((A), (B) and (C)).
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