Under what circumstance would a hand-held...

Question 1 / 205eccefa3bacbc34ba4d47f90

Question 1 of 205eccefa3bacbc34ba4d47f90

Under what circumstance would a hand-held portable phase sequence indicator be used should the main switchboard mounted fixed phase sequence indicator be inoperative?

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Question 1 of 20

5eccefa3bacbc34ba4d47f90

Under what circumstance would a hand-held portable phase sequence indicator be used should the main switchboard mounted fixed phase sequence indicator be inoperative?

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🔍 Key Concepts

• Phase sequence in a three-phase AC system and why it matters • When you must verify rotation direction of motors and generators before connecting power • Difference between internal equipment replacement vs. making or synchronizing external power connections

💭 Think About

• Which of these situations involves connecting one three-phase source to another three-phase system where rotation direction must be confirmed before closing a breaker? • In which option would an incorrect phase sequence most likely cause motors to run backward or serious system damage? • Which activities are largely mechanical/electronic replacements that don’t by themselves require checking the ship’s overall phase rotation at the main bus?:

✅ Before You Answer

• Identify which choices involve three-phase sources being connected together (or to the ship) rather than just replacing a component. • Ask: where would a wrong phase rotation immediately affect large motors, cargo gear, thrusters, or pumps when you energize the system? • Eliminate options that deal mainly with local equipment replacement that doesn’t change or verify the ship’s main bus phase sequence.

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Question 1 of 20

Under what circumstance would a hand-held portable phase sequence indicator be used should the main switchboard mounted fixed phase sequence indicator be inoperative?

paralleling alternators

replacing a defective solenoid

installing a new synchroscope

preparing to make the shore power connection

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Question 1 / 205eccefa3bacbc34ba4d47f90

Question 1 of 205eccefa3bacbc34ba4d47f90

Under what circumstance would a hand-held portable phase sequence indicator be used should the main switchboard mounted fixed phase sequence indicator be inoperative?

Back

Question 1 of 20

5eccefa3bacbc34ba4d47f90

Under what circumstance would a hand-held portable phase sequence indicator be used should the main switchboard mounted fixed phase sequence indicator be inoperative?

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?

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