EASA Instrument Rating theoretical foundations flashcards
EASA Instrument Rating theoretical foundations · Build recall with a focused review session.
30 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Limit load
- A design load associated with the maximum expected service condition, distinguished from an unrestricted promise that any repeated loading or damage is harmless.
- Damage tolerance
- A design and inspection approach considering the presence and growth of damage before it reaches a critical structural condition.
- Mass balance
- Control-surface mass distribution used to address inertial effects and flutter susceptibility, distinguished from aerodynamic assistance to the hinge moment.
- Anti-servo tab
- A tab moving with a stabilator’s trailing-edge direction in the relevant design to increase control feel, rather than merely reduce every pilot force.
- Anti-skid
- A braking-control function responding to wheel behavior to reduce a developing skid, without removing runway, tire or brake-energy limitations.
- Hydraulic actuator
- A device converting hydraulic pressure acting over an effective area into mechanical force or movement under the actual circuit conditions.
- Accumulator
- A system component storing hydraulic energy through a compressible element, with capacity and use determined by its charge and installation.
- Power transfer unit
- A device transferring mechanical power between suitable hydraulic circuits, distinguished from mixing their fluid or creating a new independent energy source.
- Outflow valve
- A valve regulating cabin air escape as part of pressurization control, distinguished from a component directly setting aircraft geometric altitude.
- Inverter
- An electrical conversion device producing AC from DC, distinguished from a rectifier that converts in the other direction.
- Detonation
- Abnormal end-gas combustion associated with damaging pressure behavior, distinguished from combustion beginning before the intended spark through a hot ignition source.
- Wastegate
- A valve controlling exhaust flow through a turbocharger turbine, influencing boost rather than directly selecting a propeller’s blade angle.
- Compressor surge
- A major breakdown of the intended compressor airflow, distinguished from an ordinary commanded thrust change or merely reduced fuel quantity.
- Constant-speed governor
- A control changing propeller blade angle within its governing range to maintain a selected rotational speed as operating load changes.
- Feathering
- A high-blade-angle configuration intended to reduce drag from an inoperative propeller, distinct from ordinary cruise pitch or a low-pitch windmilling condition.
- Usable fuel
- The quantity available for the intended engine supply under the approved definition, distinguished from total capacity or an automatic legal reserve allowance.
- Crossfeed
- A fuel-system path enabling an alternative engine-feed arrangement in the actual design, not necessarily a tank-transfer or equalization function.
- Ullage
- The space above liquid fuel in a tank, whose gas composition is relevant to the purpose of a fuel-tank inerting system.
- Anti-icing
- A protective method intended to prevent ice formation under specified conditions, distinguished from removing ice that has already accumulated.
- Chemical oxygen generator
- An oxygen source using a chemical reaction after activation, with equipment-specific supply and heat characteristics unlike a simple stored-gas bottle.
- Dew point
- The temperature to which air must be cooled under the specified conditions to reach saturation, distinguished from a direct prediction of existing fog.
- Environmental lapse rate
- The observed or supplied temperature change with height in the atmosphere, compared with a lifted parcel's cooling rate when assessing stability.
- Conditional instability
- A stability condition where an unsaturated lifted parcel and a saturated lifted parcel have different buoyancy responses under the given lapse rates.
- Advection fog
- Fog associated with moist air moving over a colder surface, distinguished from a requirement for exclusively night-time surface cooling.
- VOR radial
- A direction extending from a VOR station in its declared reference system, distinguished from the aircraft’s heading or a selected inbound course.
- Relative bearing
- A direction measured relative to the aircraft’s nose on the specified instrument, requiring the heading reference for conversion to an absolute bearing.
- QDM
- A magnetic bearing to a station in the relevant radiotelephony/navigation context, distinguished from the reciprocal bearing from that station.
- DME slant range
- The direct spatial distance between aircraft and facility, including vertical separation rather than only horizontal distance across the ground.
- Localizer
- The lateral-guidance component of an ILS, whose displayed deviation and published use must be distinguished from the separate glide-path signal.
- Glide path
- Vertical approach guidance from the specified system, distinguished from a universal permission to descend whenever any similar indication appears.