While underway at sea, a mechanical...

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Question 1 of 205eccefa4bacbc34ba4d481cd

While underway at sea, a mechanical malfunction in one of the ship's service generators operating in parallel, requires that you must secure that generator. In order to prevent a possible overload to the remaining generator, which of the following sequential courses of action should be taken?

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🔍 Key Concepts

• Operation of generators in parallel and what happens to load sharing when one is taken off the bus • Purpose of non-vital distribution feeder breakers and why they exist • Difference between using the governor to reduce load and using a prime mover throttle trip (emergency stop)

💭 Think About

• If two generators are running in parallel and you suddenly open the breaker on one, where does that generator’s load go, and what happens to the remaining generator? • In a controlled shutdown of one generator, what should you do with non-essential loads and with the load on the failing generator before you open its breaker? • Is a throttle trip an emergency action or a fine‑control action, and should that be used before or after you remove the generator from the switchboard?

✅ Before You Answer

• Make sure the sequence includes shedding non-vital loads before the remaining generator is forced to carry the full system load • Check that the steps include reducing the load on the malfunctioning generator (via governor or similar) before opening its breaker, to avoid a sudden large load transfer • Verify that the prime mover throttle trip (emergency stop) is done only after the generator has been safely disconnected from the bus, not while it’s still carrying significant load

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