When would be the safest time to close the...

Question 1 / 205eccefa4bacbc34ba4d4846f

Question 1 of 205eccefa4bacbc34ba4d4846f

When would be the safest time to close the ship's main switchboard "shore power" circuit breaker?

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Question 1 of 20

5eccefa4bacbc34ba4d4846f

When would be the safest time to close the ship's main switchboard "shore power" circuit breaker?

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🔍 Key Concepts

• Backfeed and paralleling risks between shore power and ship’s generators • Standard procedures for switching from ship’s power to shore power in port or shipyard • Why you avoid having two live power sources on the same bus without strict control

💭 Think About

• Think about what could happen if both the shore power and ship’s generators were connected to the same bus at the same time without proper synchronization. • Which option describes a condition where there is no risk of unintended paralleling or backfeeding between shore power and the ship’s generators? • In normal port or shipyard practice, what is the sequence: do you connect shore power first, then disconnect the ship’s generators, or disconnect the ship’s generators from the bus before closing in shore power?

✅ Before You Answer

• Verify which choices ensure only one live source is connected to the main bus at the moment you close the shore power breaker. • Check whether the option suggests paralleling shore and ship’s generators directly; consider if this is normally allowed or safe for typical shipboard systems. • Eliminate any answers that imply “any time” or “if a special device is used” without addressing the fundamental issue of preventing simultaneous sources on the same bus.

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Question 1 of 20

When would be the safest time to close the ship's main switchboard "shore power" circuit breaker?

when the ship's generators have been disconnected from the main bus

only after the ship's generators have been directly paralleled to those on shore

if a quick disconnect coupling is used

at any time in a shipyard

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Question 1 / 205eccefa4bacbc34ba4d4846f

Question 1 of 205eccefa4bacbc34ba4d4846f

When would be the safest time to close the ship's main switchboard "shore power" circuit breaker?

Back

Question 1 of 20

5eccefa4bacbc34ba4d4846f

When would be the safest time to close the ship's main switchboard "shore power" circuit breaker?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed