Suppose each of the main propulsion engines...

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Question 1 of 2066636eef28f7522a1c520334

Suppose each of the main propulsion engines on your harbor assist tug is equipped with a variable speed governor equipped with a solenoid actuated shutdown device. After a high temperature alarm, after continuing to rise, what is the most likely engine high temperature condition that would initiate a safety trip shutdown?

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🔍 Key Concepts

• Engine protective devices vs. alarm-only sensors on medium-speed diesel engines • How jacket water cooling relates to overall engine metal temperature and risk of damage • Typical purposes of monitoring charge air, fuel, exhaust, and jacket water temperatures

💭 Think About

• Which temperature, if it keeps rising unchecked, would most directly threaten the engine block and cylinder liners themselves? • Of the four options, which is most commonly tied into an automatic protective shutdown, rather than just an alarm for the operator to investigate? • Think about what the governor shutdown solenoid is there to protect: is it mainly for combustion efficiency issues or for preventing catastrophic mechanical damage?

✅ Before You Answer

• Verify which system’s over-temperature is usually classified as an emergency protective trip condition in diesel engine manuals (not just an alarm). • Consider which of the four systems is the primary cooling system for the engine structure and cylinders. • Ask: in harbor tug operations, which temperature is watched most closely to avoid seizure, warped heads, or blown head gaskets?

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