Question Bank • QB_SUB_DFE_MEB_002
MCQ • 1 Mark
Section 7: Dairy and Food Engineering
Heat and Mass Transfer
Subtopic: Material and energy balances in food processing systems
Question Statement:
In a continuous steady-state food processing unit with no chemical reaction, the general mass conservation equation simplifies to:
Options:
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(A) $\text{Input} = \text{Output}$
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(B) $\text{Input} - \text{Output} = \text{Accumulation}$
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(C) $\text{Accumulation} = \text{Generation}$
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(D) $\text{Output} = \text{Generation} - \text{Consumption}$
Step-by-Step Solution & Explanation
General balance equation: $\text{Input} - \text{Output} + \text{Generation} - \text{Consumption} = \text{Accumulation}$. At steady state, $\text{Accumulation} = 0$, and with no reaction, $\text{Generation} = \text{Consumption} = 0$. Hence $\text{Input} = \text{Output}$.
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