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269 - ATPL - In a gas turbine engine lubrication system fitted with an oil to fuel heat exchanger the:

Question 269 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Fuel is cooled to prevent vapour locking interrupting the fuel supply to the nozzles.
Fuel is heated as required whenever fuel filter clogging is detected.
Oil is cooled through thermal exchange with the fuel.
Oil is heated through thermal exchange with the fuel.

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