EASA ATPL021 aircraft general knowledge foundations study guide
EASA ATPL021 aircraft general knowledge foundations · Work through your exam, one topic at a time.
This independent study page provides practice for EASA ATPL021 aircraft general knowledge foundations. Its editorial learning areas include Airframe, controls and landing gear; Hydraulic, pneumatic and electrical power; Piston/turbine powerplant and propeller governing; Fuel, icing, fire and oxygen concepts. The questions develop subject knowledge and application through worked reasoning, distinctions between competing answers, and practical scenarios. Study the relevant guide before attempting a mixed set, then explain the evidence or calculation that supports each answer. Topics on this exam: Airframe, controls and landing gear, Hydraulic, pneumatic and electrical power, Piston/turbine powerplant and propeller governing, and Fuel, icing, fire and oxygen concepts. The EASA ATPL021 aircraft general knowledge foundations study guide has 4 sections and about 1,847 words.
01Structure, controls and landing gear
Aircraft general knowledge connects a component’s construction with the load or function it serves. A fuselage, wing and landing gear form interacting load paths. In semi-monocoque construction, skin, frames and longitudinal members contribute together; describing the skin as irrelevant or treating every load as a pure tensile force misses that interaction. Bending, shear and torsion are different stress conditions.
446 words, about 2 min02Hydraulic, pneumatic and electrical power
An aircraft power system is a chain from an energy source through distribution and control to a consumer. A normal indication at one point does not prove that every downstream function is healthy. First identify what the displayed quantity measures: pressure, flow, voltage, current, temperature and quantity are different observations. Interpret them in the actual circuit rather than assume that one number establishes an entire diagnosis.
477 words, about 2 min03Piston engines, turbines and propeller governing
Powerplant study begins with energy conversion and the specific engine architecture. A four-stroke piston engine passes through induction, compression, power and exhaust. A gas turbine uses continuous airflow through compression, combustion, turbine expansion and exhaust. The turbine extracts energy to drive a compressor and accessories or a power output; useful thrust and shaft power depend on the type.
458 words, about 2 min04Fuel, icing, fire and oxygen system concepts
Protection systems address particular hazards while remaining part of an aircraft-specific design. Fuel supply, contamination control, ice protection, fire detection and oxygen equipment have different purposes. A warning or test result is evidence about a defined function, not proof of every system’s condition. Learn what a component senses, what it commands and what independent evidence is available before interpreting a scenario.
466 words, about 2 min