While on watch at sea with only one ship's...

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Question 1 of 205eccefa4bacbc34ba4d48565

While on watch at sea with only one ship's service turbo-generator on line, the entire plant suddenly blacks out without warning. After restoring power, which of the following faults would most likely have attributed to this casualty?

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🔍 Key Concepts

• Ship service generator protection circuits such as reverse power, overspeed, and breaker trip logic • What happens to an online generator if its throttle valve suddenly closes or its prime mover loses power • Difference between a local blackout cause on one breaker versus an action that would affect the entire ship service bus

💭 Think About

• Which option describes a condition that would cause the running generator itself to be taken offline by its own protection system, dropping the entire bus? • For each choice, ask: would this realistically cause a complete loss of power to the whole plant, or only affect a single piece of equipment or a seldom‑used breaker? • Think about what would have to fail for the only running generator to suddenly stop supplying power with no warning.

✅ Before You Answer

• Verify which choice directly affects the online generator’s main breaker while it is carrying the entire load • Check whether any option describes an event that would normally be visible or intentional (e.g., manually pressing a button) versus an automatic protective trip • Ask whether the event would realistically cause an instantaneous total blackout, not just a partial loss of services

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