Which type of pump is responsible for transferring fuel from various cells to the main tanks?

• A. Boost Pump
• B. Ejector Pump
• C. Transfer Pump
• D. Submersible Pump

Answer: (C)

The transfer pump is specifically designed to move fuel from the various fuel cells, such as those found in the wings or fuselage of an aircraft, to the main fuel tanks. This function is crucial to ensure a continuous supply of fuel for the engines during flight. The transfer pump typically operates to maintain the required fuel balance and ensure that the main tanks are adequately filled from the auxiliary tanks as needed.

In contrast, boost pumps are utilized to increase the pressure of the fuel and ensure a steady flow to the engines, particularly during takeoff or when fuel levels are low. Ejector pumps employ a different principle by using the Venturi effect to draw fuel into the system but are not typically responsible for transferring fuel from cells to the main tanks. Submersible pumps are often used in applications where pumping needs to occur from below the surface of a liquid, but they don't specifically transfer fuel as their primary function. Thus, the transfer pump is the clear and correct choice for the task of moving fuel from various cells to the main tanks.