Free UK Part-66 Module 11A Turbine Aeroplane Aerodynamics, Structures and Systems (B1.1) Practice Questions

Sample Practice Questions

Try these 10 sample questions from the UK Part-66 Module 11A Turbine Aeroplane Aerodynamics, Structures and Systems (B1.1) practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1In a servo-tab flight-control system, which movement does the pilot command directly?

   1. A.The main surface, with its tab following through a fixed balance linkage.
   2. B.The servo tab, whose aerodynamic force then moves the main surface.Correct answer: B
   3. C.The main surface, with its tab remaining fixed at the neutral angle.
   4. D.The servo tab, which increases the force needed to move the main surface.

   Explanation: The FAA handbook states: "Only the servo tab moves in response to movement by the pilot of the primary flight controls." The pilot positions the tab; the resulting aerodynamic force operates the main surface. A balance-tab linkage follows main-surface movement, while increasing control effort describes an antiservo action.

   Reference: FAA Aviation Maintenance Technician Handbook—Airframe — Chapter 2, Trim Controls, p. 2-11

2. 2Why are repeated pressurisation cycles significant when assessing a metal fuselage?

   1. A.They remove earlier fatigue damage by unloading the vessel between flights.
   2. B.They cause fatigue through repeated loading and unloading of the pressure vessel.Correct answer: B
   3. C.They create only a static load because pressure is steady during each cruise.
   4. D.They affect thermal expansion alone rather than the structure's mechanical stress.

   Explanation: The FAA handbook states: "cycling from unpressurized to pressurized and back again on each flight causes metal fatigue." Repeated pressure loading produces fatigue. Unloading does not heal fatigue damage; a steady cruise does not remove the repeated flight-to-flight stress cycle.

   Reference: FAA Aviation Maintenance Technician Handbook—Airframe — Chapter 1, Pressurization, p. 1-9

3. 3Which pressures are compared by a conventional mechanical airspeed indicator?

   1. A.Cabin pressure and outside static pressure.
   2. B.Pitot ram pressure and outside static pressure.Correct answer: B
   3. C.Engine bleed pressure and pitot ram pressure.
   4. D.Outside static pressure and a fixed vacuum reference.

   Explanation: The FAA handbook states: "Ram air pressure from the aircraft’s pitot tube is directed into a diaphragm in an analog airspeed instrument case. Static air pressure from the aircraft static vent(s) is directed into the case surrounding the diaphragm." The pressure difference deflects the diaphragm and produces airspeed indication. Cabin differential, bleed pressure and an evacuated reference describe different measurements.

   Reference: FAA Aviation Maintenance Technician Handbook—Airframe — Chapter 10, Airspeed Indicators, p. 10-23

4. 4A Kidde thermistor-type continuous-loop sensor is heated. Which change is used by its control unit to detect the condition?

   1. A.Increasing resistance from the core to ground.
   2. B.Increasing pressure inside a pneumatic sensing element.
   3. C.Decreasing resistance from the core to ground.Correct answer: C
   4. D.An open circuit caused by separation of the conductors.

   Explanation: The source states: "As the temperature of the core increases, electrical resistance to the ground decreases." The thermistor core's resistance falls with heating. A pressure rise belongs to a pneumatic detector, while an open circuit is a discontinuity rather than the normal thermistor alarm response.

   Reference: FAA Aviation Maintenance Technician Handbook—Airframe — Chapter 17, Kidde System, p. 17-4

5. 5Which description distinguishes fuel transfer from engine crossfeed on a jet transport?

   1. A.Transfer supplies an engine from either side; crossfeed moves fuel between tanks.
   2. B.Transfer and crossfeed both move fuel only between tanks.
   3. C.Transfer moves fuel between tanks; crossfeed allows a tank to supply another engine.Correct answer: C
   4. D.Transfer and crossfeed both discharge fuel only through the refuelling connection.

   Explanation: The handbook states: "The fuel transfer system is a series of plumbing and valves that permits movement of fuel from one tank to another on board the aircraft." It also states: "A manifold or connecting tubing typically allows any tank to supply any engine through the use of crossfeed valves." Transfer changes the tank holding the fuel; crossfeed provides an alternative tank-to-engine feed path. Reversing those functions, treating both as tank transfer or equating them with defuelling is incorrect.

   Reference: FAA Aviation Maintenance Technician Handbook—Airframe — Chapter 14, Jet Transport Aircraft Fuel Systems, p. 14-14

6. 6What is the fundamental purpose of an anti-icing system, as distinct from a deicing system?

   1. A.Prevent ice formation on the protected surface.Correct answer: A
   2. B.Break away an existing layer by periodically flexing the surface.
   3. C.Indicate the thickness of ice without changing it.
   4. D.Remove an accumulated layer by applying heat in periodic shedding cycles.

   Explanation: The handbook states: "anti-icing systems installed to prevent the formation of ice on these components." Prevention distinguishes anti-icing from mechanical or thermal removal of ice already present. Ice detection alone does not prevent formation.

   Reference: FAA Aviation Maintenance Technician Handbook—Airframe — Chapter 15, Airfoil Anti-Ice and Deice, leading-edge systems

7. 7What is the conventional colour arrangement of aircraft position lights?

   1. A.Left red, right green, rear white.Correct answer: A
   2. B.Left green, right red, rear white.
   3. C.Left white, right green, rear red.
   4. D.Left red, right white, rear green.

   Explanation: The handbook states: "The green light unit is always mounted at the extreme tip of the right wing. The red unit is mounted in a similar position on the left wing." The rear-facing position light is white. The other arrangements exchange the directional colours and would communicate the wrong orientation.

   Reference: FAA Aviation Maintenance Technician Handbook—Airframe — Chapter 9, Position Lights, p. 9-100

8. 8What flushing medium characterises the closed lavatory system described in the FAA water-system guidance?

   1. A.Filtered recirculated waste water containing disinfectant.Correct answer: A
   2. B.Fresh potable rinse water used once and then sent to the holding tank.
   3. C.Air alone, without rinse water or disinfectant.
   4. D.Unfiltered waste water recirculated without any disinfectant.

   Explanation: The source states: "The lavatory waste water system can be either a closed system using filtered waste water containing disinfectant or an open system using potable rinse water." The closed system recirculates filtered, treated liquid. Fresh potable rinse is the open-system description; air-only flushing and untreated recirculation omit the specified medium.

   Reference: FAA AC 25.1455-1 — Waste Water/Potable Water Drain System Certification Testing — Paragraph 3(a), Background, p. 1

9. 9What distinguishes an integrated modular avionics architecture from an architecture using a separate dedicated computer for each aircraft function?

   1. A.Every hosted function communicates solely through analogue point-to-point wiring.
   2. B.All hosted functions are merged into one application without internal separation.
   3. C.Each aircraft function retains an exclusive processor that cannot host other functions.
   4. D.Shared hardware and software resources provide a platform for hosted applications.Correct answer: D

   Explanation: The source states: "hardware and software resources that, when integrated, form a platform that provides services." IMA provides common platform resources for aircraft-function applications. It does not require exclusive computers, eliminate application separation, or restrict communication to analogue wiring.

   Reference: FAA Integrated Modular Avionics Development, Verification, Integration and Approval — Appendix E, Integrated modular avionics definition, p. E-4

10. 10Which item is dedicated to storing and retrieving the digital information that replaces aircraft paper or microfilm reference material?

    1. A.A general-use display shared by several aircraft systems.
    2. B.A flight-deck printer shared with other aircraft systems.
    3. C.An electronic-library mass-storage unit and its controller.Correct answer: C
    4. D.A general-purpose display controller receiving several systems' data.

    Explanation: The source states: "Includes units that are dedicated to the information storage and retrieval function such as the electronic library mass storage and controller." The dedicated library storage/controller performs this function. Shared displays, printers and general display controllers present or process information rather than constituting the dedicated electronic-library store.

    Reference: UK Part-66 Appendix I Basic Knowledge Requirements — Module 11A, 11.21 Information Systems, dedicated information storage and retrieval