620 - ATPL - Consider a jet engine whose control is based on the Engine Pressure Ratio (EPR): 1. With a constant EPR, the thrust decreases when the altitude increases; 2. With a constant EPR, the thrust is independent of the Mach number; 3. At same environmental conditions, a given EPR setting maintains the thrust irrespective of engine wear due to ageing; 4. The EPR is determined by the impact pressure difference between the turbine outlet and the compressor inlet; 5. On take-off, in the event of icing not detected by the crew, the indicated EPR is lower than the real EPR. The combination regrouping all the correct statements is:

Question 620 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license