OneWater Practice Exam

Which reactor type has no flow in/out during the reaction?

Batch Complete Mix (CMFR) Plug Flow Packed Bed

Correct Answer:

Batch

Explanation:

The idea being tested is that in a batch reactor there is no feed or withdrawal during the reaction. You load the reactor with the reactants, seal it, and let the reaction proceed (often with stirring) for a set time. During this stage the volume stays fixed and there is no flow in or out. After the reaction is complete, you remove the product. This contrasts with continuous-flow reactors like complete-mix (CSTR), plug flow, and packed bed, where reactants are constantly entering and products are leaving as the reaction proceeds. So, the batch reactor is the one with no flow in/out during the reaction.

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