Gas Turbine Engine

The Brayton cycle, engine types, thrust production, thermal and propulsive efficiency, ram effect and flat rating.

Subsonic and supersonic intakes as diffusers, ram pressure recovery, distortion and ingestion hazards.

Axial and centrifugal compressors, rotor/stator action, stall/surge and its control (bleed valves, VSV/VIGV).

Chamber types, primary/secondary air, flame stabilisation and dilution cooling.

Impulse/reaction turbines, nozzle guide vanes, fir-tree blade roots, creep and blade cooling.

Propelling nozzles, the exhaust cone, convergent-divergent nozzles and thrust reversers.

Ball and roller main bearings, bearing sumps, and labyrinth and carbon seals.

Synthetic oils and turbine fuels, the recirculatory oil system, and the fuel/oil heat exchanger.

Fuel metering and scheduling, the FCU and FADEC, distribution and surge/flame-out protection.

Internal cooling/sealing air and clearance control, starters, ignition, the start sequence and start faults.

EPR/N1 thrust setting, N1/N2 and EGT indication, plus water injection and afterburning.

Reduction gearing, free-turbine layouts, turboshaft drives and auxiliary power units.

Engine mounts and QEC, fire detection/extinguishing, condition/trend monitoring, ground operation and preservation.

Timed EASA-style Category B1 paper across all thirteen topic areas — 92 questions in 115 minutes, 75% to pass.