Question

With battery power only, in flight, which bus or buses will be powered?

a. DC ESS bus
b. EMER bus
c. BATT bus
d.All of the Above

Answer 1

On battery power only, all essential buses such as the DC ESS bus, EMER bus, and BATT bus would be powered, making 'All of the Above' the correct answer.

Step-by-step explanation:

When an aircraft is operating on battery power only in flight, the distribution of power depends on the design of the aircraft’s electrical system. Typically, essential buses such as the DC ESS bus, which powers critical avionics and systems required for safe flight, would be powered. The EMER bus, another critical bus, would also be powered since it supplies power to emergency equipment. Lastly, the BATT bus, or battery bus, is the bus that directly connects to the aircraft's batteries, would most certainly be powered as well. Therefore, the correct answer is d. All of the Above, indicating that all these buses would be powered.