Question 587General Subjects - Assistant Engineer
70% to passReferring to the illustrated motor ship fresh water cooling system drawing, what statement is true concerning the jacket water heater? Illustration MP-CW-06
AThe jacket water heater is used only when the engine is idle to keep the engine warm.
BThe jacket water heater is used under low engine load conditions to provide supplemental heat for the evaporator.
CThe jacket water heater is used only when the engine is idle for the sole purpose of generating fresh water at the evaporator.
DThe jacket water heater is used under high engine load conditions to dissipate excess engine heat.
AI Explanation
The correct answer is A) The jacket water heater is used only when the engine is idle to keep the engine warm. This is correct because the jacket water heater is used to maintain the engine at an optimal operating temperature when the engine is not under load, such as when the vessel is idle. The heater helps prevent the engine from cooling down excessively, which could lead to difficulties in restarting the engine. The other answer choices are incorrect because they do not accurately describe the primary purpose of the jacket water heater in a marine engine cooling system.
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