During cruise flight, the electrical boost pump switches should be selected:

• A. On
• B. Auto
• C. Reset
• D. Off

Answer: (B)

Electric boost pumps are there to maintain fuel pressure to the engines and provide redundancy if a main pump loses pressure. In cruise, setting the pumps to Auto allows them to operate only when needed: they automatically come on if the engine-driven pump pressure drops below a set threshold or during crossfeed, keeping fuel flowing without requiring pilot input. This automatic behavior protects against fuel starvation in a pump failure scenario while avoiding unnecessary electrical load and wear from leaving the pumps on continuously. The Reset position is for clearing a fault after it trips, not for normal operation, and Off would remove boost pressure entirely, which is unsafe if one pump or the engine-driven pump fails. So Auto is the sensible default for cruise.