Assuming that a ship's service generator is...

Question 1 / 2707066636eed28f7522a1c51d358

Question 1 of 2707066636eed28f7522a1c51d358

Assuming that a ship's service generator is directly coupled to the prime mover, what condition must cause a prime mover to automatically shutdown?

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Question 1 of 27070

Assuming that a ship's service generator is directly coupled to the prime mover, what condition must cause a prime mover to automatically shutdown?

🔍 Key Concepts

• Relationship between prime mover speed and generator frequency when directly coupled • Difference between generator protection (electrical/magnetic/thermal) and prime mover protection (mechanical/lubrication/cooling) • Which conditions require an immediate automatic trip to prevent severe mechanical damage

💭 Think About

• Which of the listed conditions, if not corrected instantly, would most quickly and permanently damage the prime mover’s bearings or moving parts? • For a directly coupled set, does a change in frequency or power factor normally cause an automatic shutdown of the engine/turbine itself, or some other type of control action? • Which options are about electrical performance of the generator versus mechanical health of the driving machine?

✅ Before You Answer

• Identify which answer choices describe electrical characteristics of the generator (not usually cause for immediate prime mover shutdown). • Identify which choice directly relates to bearing protection and lubrication, which is critical for any rotating machinery. • Ask: Which condition would standard safety systems be designed to trip the prime mover on, rather than just alarm or reduce load?

Question 1 of 27070

Assuming that a ship's service generator is directly coupled to the prime mover, what condition must cause a prime mover to automatically shutdown?

Low generator bearing lubricating oil pressure.

High generator cooling air temperature.

Low generator output frequency.

High generator power factor.

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Question 1 / 2707066636eed28f7522a1c51d358

Question 1 of 2707066636eed28f7522a1c51d358

Assuming that a ship's service generator is directly coupled to the prime mover, what condition must cause a prime mover to automatically shutdown?

Back

Question 1 of 27070

Assuming that a ship's service generator is directly coupled to the prime mover, what condition must cause a prime mover to automatically shutdown?