USCG Third Assistant Engineer (3/AE) Practice Test

Question: 1 / 400

Why is it important not to overheat lube oil or fuel?

To improve fuel efficiency

To allow correct flow through the purifier

While the response highlights the importance of correct flow through the purifier, it's essential to focus on the more critical reason for not overheating lube oil or fuel, which is to prevent oil degradation.

When lube oil or fuel is subjected to high temperatures, chemical reactions can lead to oxidation, thermal breakdown, and the formation of sludge and varnish. This degradation not only changes the viscosity and lubricating properties of the oil but also can lead to the creation of harmful contaminants that can damage engine components.

Maintaining proper temperature control ensures the oil functions effectively, providing necessary lubrication and protection to engine parts. This is crucial for the longevity of the engine and its systems, as oil degradation can result in increased wear and tear, reduced efficiency, and expensive repairs.

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To prevent oil degradation

To enhance engine performance

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