The essential DC bus powers which loads?

The essential DC bus powers which loads?

• A. Cabin lighting
• B. Noncritical systems
• C. Critical avionics and flight instruments
• D. External power receptacle

Answer: (C)

The essential DC bus is focused on keeping the systems that must stay powered for safe flight when power is limited. That means it supplies the critical avionics and flight instruments—the equipment pilots rely on to maintain control, navigate, and monitor the aircraft. Other loads like cabin lighting or noncritical systems can be shed to conserve power, and the external power receptacle is a source, not a load, so it isn’t powered by the bus.

The essential DC bus is focused on keeping the systems that must stay powered for safe flight when power is limited. That means it supplies the critical avionics and flight instruments—the equipment pilots rely on to maintain control, navigate, and monitor the aircraft. Other loads like cabin lighting or noncritical systems can be shed to conserve power, and the external power receptacle is a source, not a load, so it isn’t powered by the bus.