Question 438Motor Plants - Assistant Engineer
70% to passSacrificial zinc anodes are used on the salt water side of diesel engine heat exchangers to _______________.
Areduce electrolytic action on heat exchanger metals
Bprovide a protective coating on heat exchanger surfaces
Ckeep heat transfer surfaces shiny and clean
Dprevent rapid accumulation of marine growth
AI Explanation
The correct answer is A) reduce electrolytic action on heat exchanger metals. Sacrificial zinc anodes are used on the salt water side of diesel engine heat exchangers to protect the metal components from corrosion due to electrolytic action. The zinc anode is designed to corrode preferentially, sacrificing itself to prevent the more valuable heat exchanger metals from being corroded. This protects the integrity and functionality of the heat exchanger. The other answer choices are incorrect because: B) does not accurately describe the purpose of sacrificial anodes, C) is not the primary function, and D) is not the purpose of sacrificial anodes on heat exchangers.
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