The 24 volt DC bus on the emergency...

The 24 volt DC bus on the emergency...

Question 1 of 270705eccefa4bacbc34ba4d4849a

The 24 volt DC bus on the emergency switchboard is used to supply power to what system or equipment?

Question 1 of 27070

Q

The 24 volt DC bus on the emergency switchboard is used to supply power to what system or equipment?

🔍 Key Concepts

• Emergency switchboard functions under SOLAS and typical shipboard practice • Difference between essential services (like steering and propulsion) and emergency services (like alarms and communications) • Typical voltage and power needs of lighting, motors, and control/communication circuits

💭 Think About

• Which of these loads must remain available even if the main power fails completely, so the crew can control and coordinate emergencies? • Which equipment listed normally requires high-power AC or higher-voltage DC to run motors, versus low-voltage DC for control and signaling? • Think about what a 24-volt DC bus is commonly used for on ships: is it more for heavy machinery power, or for control, alarm, and communication circuits?

✅ Before You Answer

• Identify which options involve large motors that would not normally be fed from a low-voltage 24 V DC bus • Confirm which systems are considered emergency services required by SOLAS to operate on emergency power (especially alarms and communications) • Eliminate any choice that normally runs on main AC power rather than low-voltage DC