⚙️Aircraft General Knowledge — Airframe, Systems, Powerplant
Covers aircraft structures, hydraulic and pneumatic systems, landing gear, flight controls, fuel systems, electrics, ice and rain protection, cabin pressurization, and both piston and turbine powerplants. The largest and most technical EASA ATPL subject.
Exam Details
80
Questions
120 min
Time Limit
75%
Pass Mark
Approximately 1.5 minutes per question · You need 60 correct answers to pass
Topics Covered
Airframe construction, materials, and structural loads
Hydraulic and pneumatic systems
Landing gear, wheels, tires, and braking systems
Flight control surfaces and fly-by-wire systems
Fuel systems, fuel types, and fuel management
Electrical power generation, distribution, and batteries
Piston engine theory, supercharging, and propellers
Gas turbine engines: axial compressors, combustion, and thrust management
Study Tips for 021 Aircraft General Knowledge — Airframe, Systems, Powerplant
Draw system diagrams from memory (hydraulic, pneumatic, fuel) — the exam tests system flow and component order.
Understand failure modes: what happens when a hydraulic pump fails, when an alternator drops offline, etc.
For turbine engines, know the Brayton cycle stages and how each variable (temperature, pressure, velocity) changes.
Learn piston engine mixture management, detonation vs. pre-ignition causes, and carburettor icing conditions.
This is the longest exam — practice time management with mock tests to avoid running out at the end.
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Test your knowledge of 021 Aircraft General Knowledge — Airframe, Systems, Powerplant with our EASA-style practice questions. Timed exams, detailed explanations, and performance tracking.
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Frequently Asked Questions
How many questions are on the EASA 021 Aircraft General Knowledge — Airframe, Systems, Powerplant exam?
The EASA 021 Aircraft General Knowledge — Airframe, Systems, Powerplant exam consists of 80 multiple-choice questions. You have 120 minutes to complete the exam, which gives you approximately 1.5 minutes per question.
What is the pass mark for EASA Aircraft General Knowledge — Airframe, Systems, Powerplant?
You need to score at least 75% to pass the EASA 021 Aircraft General Knowledge — Airframe, Systems, Powerplant exam. That means you need 60 correct answers out of 80 questions. There is no negative marking — unanswered or incorrect questions score zero.
How hard is the EASA Aircraft General Knowledge — Airframe, Systems, Powerplant exam?
EASA 021 Aircraft General Knowledge — Airframe, Systems, Powerplant is rated as advanced difficulty. This is one of the more challenging ATPL subjects, requiring significant study time and strong conceptual understanding. The key topics to master include Airframe construction, materials, and structural loads, Hydraulic and pneumatic systems, Landing gear, wheels, tires, and braking systems.
How should I study for EASA 021 Aircraft General Knowledge — Airframe, Systems, Powerplant?
Start with a structured textbook (Bristol Ground School or Oxford ATPL series) covering all 8 main topics. Then move to practice questions to identify weak areas. Draw system diagrams from memory (hydraulic, pneumatic, fuel) — the exam tests system flow and component order. Aim to complete at least 500 practice questions before sitting the real exam.
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