Question 79General Subjects - 1st Asst/Chief
70% to passRegarding a reverse-osmosis type freshwater generator using multiple spiral-wound membrane modules, what statement is true?
AModules may be piped in series to increase the freshwater throughput.
BModules may be piped in series to increase the freshwater purity.
CModules may be piped in parallel to increase the freshwater purity.
DModules may be piped in series to decrease the likelihood of fouling.
AI Explanation
The correct answer is B) Modules may be piped in series to increase the freshwater purity. The reasoning is that in a reverse-osmosis freshwater generator, piping the modules in series increases the number of filtration stages, which in turn improves the purity of the final freshwater output. This is because each additional module filters out more impurities, resulting in a higher quality freshwater product. The other options are incorrect because: A) piping in series increases throughput, not purity; C) piping in parallel increases throughput, not purity; and D) piping in series does not decrease the likelihood of fouling, which is mainly influenced by pretreatment and cleaning processes.
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