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623 - ATPL - The reason for having a low pressure fuel-cooled oil cooler in a recirculatory type oil system is to:

Question 623 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Cool both the oil and the fuel.
Cool the oil only.
Heat the fuel only.
Cool the oil and heat the fuel.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license