EASA Part-66 Exam Practice Questions

Module 15 - Gas Turbine Engines

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SubsectionFree Trial Membership QuestionsPremium Membership Questions
15.01 - FundamentalsPotential energy, kinetic energy, Newton’s laws of motion, Brayton cycle; The relationship between force, work, power, energy, velocity, acceleration; Constructional arrangement and operation of turbojet, turbofan, turboshaft, turboprop.(Premium only)428300083
15.02 - Engine PerformanceGross thrust, net thrust, choked nozzle thrust, thrust distribution, resultant thrust, thrust horsepower, equivalent shaft horsepower, specific fuel consumption; Engine efficiencies; By-pass ratio and engine pressure ratio; Pressure, temperature and velocity of the gas flow; Engine ratings, static thrust, influence of speed, altitude and hot climate, flat rating, limitations.(Premium only)08500085
15.03 - InletCompressor inlet ducts Effects of various inlet configurations; Ice protection.(Premium only)474700047
15.04 - CompressorsAxial and centrifugal types; Constructional features and operating principles and applications; Fan balancing; Operation: Causes and effects of compressor stall and surge; Methods of air flow control: bleed valves, variable inlet guide vanes, variable stator vanes, rotating stator blades; Compressor ratio.(Premium only)48127000127
15.05 - Combustion SectionConstructional features and principles of operation.(Premium only)285500055
15.06 - Turbine SectionOperation and characteristics of different turbine blade types; Blade to disk attachment; Nozzle guide vanes; Causes and effects of turbine blade stress and creep.(Premium only)787800078
15.07 - ExhaustConstructional features and principles of operation; Convergent, divergent and variable area nozzles; Engine noise reduction; Thrust reversers.(Premium only)285000050
15.08 - Bearings and SealsConstructional features and principles of operation.(Premium only)02100021
15.09 - Lubricants and FuelsProperties and specifications; Fuel additives; Safety precautions.(Premium only)183500035
15.10 - Lubrication SystemSystem operation/lay-out and components.(Premium only)235400054
15.11 - Fuel SystemsOperation of engine control and fuel metering systems including electronic engine control (FADEC); Systems lay-out and components.(Premium only)59128000128
15.12 - Air SystemsOperation of engine air distribution and anti-ice control systems, including internal cooling, sealing and external air services.(Premium only)51400014
15.13 - Starting and Ignition SystemsOperation of engine start systems and components; Ignition systems and components; Maintenance safety requirements.(Premium only)407200072
15.14 - Engine Indicating SystemsExhaust Gas Temperature/Interstage Turbine Temperature; Engine Thrust Indication: Engine Pressure Ratio, engine turbine discharge pressure or jet pipe pressure systems; Oil pressure and temperature; Fuel pressure and flow; Engine speed; Vibration measurement and indication; Torque; Power.(Premium only)318700087
15.15 - Power Augmentation SystemsOperation and applications; Water injection, water methanol; Afterburner systems.(Premium only)02400024
15.16 - Turbo-prop EnginesGas coupled/free turbine and gear coupled turbines; Reduction gears; Integrated engine and propeller controls; Overspeed safety devices.(Premium only)101600016
15.17 - Turbo-shaft EnginesArrangements, drive systems, reduction gearing, couplings, control systems.(Premium only)460006
15.18 - Auxiliary Power Units (APUs)Purpose, operation, protective systems.(Premium only)142500025
15.19 - Powerplant InstallationConfiguration of firewalls, cowlings, acoustic panels, engine mounts, anti-vibration mounts, hoses, pipes, feeders, connectors, wiring looms, control cables and rods, lifting points and drains.(Premium only)82200022
15.20 - Fire Protection SystemsOperation of detection and extinguishing systems.(Premium only)386600066
15.21 - Engine Monitoring and Ground OperationProcedures for starting and ground run-up; Interpretation of engine power output and parameters; Trend (including oil analysis, vibration and boroscope) monitoring; Inspection of engine and components to criteria, tolerances and data specified by engine manufacturer; Compressor washing/cleaning; Foreign Object Damage.(Premium only)367700077
15.22 - Engine Storage and PresevationPreservation and depreservation for the engine and accessories/systems.(Premium only)02000020
15.23 - Import 439 2019-06-11 03:3:01These are newly added questions. They are currently being researched by our subject specialists. Some questions may be incomplete and/or not yet be answered. Shortly they will be completed/answered and moved to their respective sub-sections.(Premium only)333333
Total Questions:01195