What are the two common types of fuel pumps in small aircraft and where are they located?

What are the two common types of fuel pumps in small aircraft and where are they located?

• A. Engine-driven pump (mounted on the engine) and electric boost pump (in the fuel system)
• B. Pump mounted in the landing gear
• C. Vacuum pump in the fuselage
• D. Manual hand pump in cockpit

Answer: (A)

In small aircraft, fuel delivery relies on two common pumps: an engine-driven pump mounted on the engine and an electric boost pump placed in the fuel system. The engine-driven pump provides normal fuel pressure while the engine is running, acting as the primary supply. The electric boost pump, powered by the aircraft’s electrical system, gives extra pressure when starting, for priming, or if the engine-driven pump is not delivering adequate pressure. This setup also provides redundancy and helps prevent fuel starvation during critical phases like starting and takeoff; the boost pump is typically located in the fuel system—often near the firewall or in the wing/fuel lines—so it can quickly push fuel to the engine. Other options don’t fit because a pump in the landing gear isn’t used for fuel, a vacuum pump serves instruments rather than fuel, and a manual hand pump is not a standard feature on most small aircraft today.

In small aircraft, fuel delivery relies on two common pumps: an engine-driven pump mounted on the engine and an electric boost pump placed in the fuel system. The engine-driven pump provides normal fuel pressure while the engine is running, acting as the primary supply. The electric boost pump, powered by the aircraft’s electrical system, gives extra pressure when starting, for priming, or if the engine-driven pump is not delivering adequate pressure. This setup also provides redundancy and helps prevent fuel starvation during critical phases like starting and takeoff; the boost pump is typically located in the fuel system—often near the firewall or in the wing/fuel lines—so it can quickly push fuel to the engine. Other options don’t fit because a pump in the landing gear isn’t used for fuel, a vacuum pump serves instruments rather than fuel, and a manual hand pump is not a standard feature on most small aircraft today.