Question id 170 - Aircraft General Knowledge - PPL(H) - Private Pilot License

Engine lubricant, exhaust gas, outside air, cabin air, directional gyro
Engine lubricant, cylinder head, exhaust gas, suction, outside air, cabin air
Engine lubricant, engine cooling fluid, cylinder head, exhaust gas, outside air, cabin air
Engine oil, cylinder head, exhaust gas, altimeter, airspeed indicator, vertical speed indicator