Which of the listed sections of an emergency...

Question 1 / 270705eccefa4bacbc34ba4d48499

Question 1 of 270705eccefa4bacbc34ba4d48499

Which of the listed sections of an emergency switchboard is used to supply power for alarm signals under emergency conditions?

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Question 1 of 27070

Which of the listed sections of an emergency switchboard is used to supply power for alarm signals under emergency conditions?

🔍 Key Concepts

• Emergency switchboard sections and what they typically power • Differences between DC (direct current) and AC (alternating current) supplies on ships • Why alarm and control circuits often use low-voltage DC power

💭 Think About

• Which type of power supply is most reliable for small control and alarm circuits during an emergency? • Think about which bus would still allow key alarms to function safely, even if larger AC systems are affected. • Which option sounds more appropriate for continuous, low-power, safety‑critical loads rather than heavy machinery or lighting?

✅ Before You Answer

• Identify which choice represents a low-voltage DC source suitable for control and alarm circuits. • Eliminate options that normally feed large motors or heavy AC loads rather than small alarms. • Ask: In an emergency, which section is most likely designed to keep essential alarms and monitoring energized with minimal power?

Question 1 of 27070

Which of the listed sections of an emergency switchboard is used to supply power for alarm signals under emergency conditions?

The 24 volt DC bus

The 120 volt, 60 cycle, 3-phase bus

The 450 volt, 60 cycle, 3-phase bus

The generator and bus transfer section