Private Pilot Licence · Mock exam

In a typical single-engine piston aircraft, cabin heat is provided by:

• A.A dedicated electric heater element drawing current from the main electrical bus in cruise flight
• B.Air warmed by passing around the exhaust system (heat exchanger/muff), then ducted to the cabin
• C.A small auxiliary battery dedicated to powering the cabin heater independently of the main bus
• D.A liquid engine coolant circuit routed through the cabin heating matrix to the occupants