Aircraft Maintenance Engineer (AME) License Exams — Questions and Answers

Question 1: An AME is performing a functional test of a TCAS II system. The test set simulates a conflict that generates a 'Climb, Climb' aural alert and a corresponding visual command on the PFD. What type of advisory has been generated?

Resolution Advisory (RA) (Correct answer)
System Test Advisory (STA)
Proximity Advisory (PA)
Traffic Advisory (TA)

Correct answer: Resolution Advisory (RA)

TCAS II provides two levels of alerts. A Traffic Advisory (TA) simply alerts the crew to the presence of nearby traffic. A Resolution Advisory (RA) is a command that instructs the pilot to perform a specific vertical maneuver, such as 'Climb' or 'Descend', to avoid a collision.

Question 2: What is a fire extinguisher 'squib' on an aircraft?

The electrical connector for the fire detection loop
A small pyrotechnic device that punctures the extinguisher container to release the agent when activated (Correct answer)
The pressure gauge on the fire extinguisher bottle
A reusable valve that can be manually reset after discharge

Correct answer: A small pyrotechnic device that punctures the extinguisher container to release the agent when activated

A squib is a pyrotechnic initiator that, when electrically activated, fires to pierce the extinguisher container's frangible disc and release the suppression agent into the fire zone.

Question 3: Propeller blade 'twist' (varying pitch from root to tip) exists because:

The twist compensates for the asymmetric disc effect
Aerodynamic forces twist the blade during high-power operation
Manufacturing tolerances cause unavoidable pitch variation
The blade tip moves faster than the root, requiring a lower angle at the tip for uniform efficiency (Correct answer)

Correct answer: The blade tip moves faster than the root, requiring a lower angle at the tip for uniform efficiency

Propeller blades are twisted so that the tip (moving faster) has a lower pitch angle than the root, maintaining a consistent angle of attack along the entire blade length.

Question 4: Why are aircraft materials chosen for their strength-to-weight ratio?

To increase the aircraft's overall weight.
To simplify the aircraft's design.
To decrease the aircraft's operational costs.
To reduce fuel consumption and increase efficiency (Correct answer)

Correct answer: To reduce fuel consumption and increase efficiency

Aircraft materials are meticulously chosen for their high strength-to-weight ratio to significantly reduce the aircraft's overall weight. Lighter aircraft require less fuel to operate, directly leading to reduced fuel consumption and increased operational efficiency. This material selection is crucial for achieving optimal performance, range, and cost-effectiveness in aviation.

Question 5: Why is it essential to use the correct tools and equipment during aircraft repairs?

To reduce the cost of repairs.
To ensure repairs are done correctly and safely (Correct answer)
To speed up the repair process.
To make repairs look aesthetically pleasing.

Correct answer: To ensure repairs are done correctly and safely

Using the correct tools and equipment during aircraft repairs is absolutely essential for maintaining the structural integrity and operational safety of the aircraft. Specialized tools are designed to fit specific components precisely, preventing damage that can occur from using improper instruments. This precision ensures that repairs are performed according to manufacturer specifications, preventing future malfunctions and upholding the highest safety standards.

Question 6: An AME is performing a visual inspection on a section of aluminum alloy aircraft skin and observes small, white or gray powdery deposits. This is indicative of which type of corrosion?

Pitting corrosion
Surface corrosion (Correct answer)
Fretting corrosion
Filiform corrosion

Correct answer: Surface corrosion

Surface corrosion is the most common type of corrosion on aluminum and magnesium alloys. It is characterized by a uniform attack on the surface, which first appears as a general dulling or etching of the surface, and then progresses to form white or gray powdery deposits.

Question 7: What role does aircraft documentation play in troubleshooting?

It focuses on cosmetic repairs.
It provides historical context and guidance for troubleshooting (Correct answer)
It prevents the need for additional inspections.
It reduces the time required for repairs.

Correct answer: It provides historical context and guidance for troubleshooting

Aircraft documentation, including maintenance manuals, service bulletins, wiring diagrams, and previous repair records, is invaluable for troubleshooting. It offers a comprehensive historical context of the aircraft's systems and past issues, helping technicians understand potential failure points or recurring problems. This detailed guidance allows for more efficient and accurate diagnosis, ensuring repairs are performed correctly and in compliance with established procedures.

Question 8: An experienced AME is performing a routine inspection that they have done hundreds of times. They begin to skip a few steps in the checklist, assuming everything is normal as it usually is. This behaviour is a primary example of which human factors error?

Lack of Knowledge
Complacency (Correct answer)
Stress
Distraction

Correct answer: Complacency

Complacency is a significant human factor error where extensive experience on a repetitive task leads to a false sense of security. This causes the individual to become less vigilant and potentially skip crucial steps. The AME's assumption that everything is normal because it always has been is a classic sign of complacency.

Question 9: In a typical large transport aircraft, which component is primarily responsible for regulating the pressure and temperature of engine bleed air before it is distributed to various pneumatic systems?

The Pressure Regulating and Shutoff Valve (PRSOV). (Correct answer)
The APU load compressor.
The cabin outflow valve.
The pneumatic system check valve.

Correct answer: The Pressure Regulating and Shutoff Valve (PRSOV).

The Pressure Regulating and Shutoff Valve (PRSOV), often called a Bleed Air Valve, is the primary component that modulates the flow of hot, high-pressure air from the engine's compressor section. It regulates the downstream pressure and often incorporates a heat exchanger or precooler to reduce the air to a usable temperature for systems like air conditioning and wing anti-ice.

Question 10: When performing a dye penetrant inspection, what is the primary purpose of the developer?

To clean the surface of the material before applying the penetrant.
To draw the penetrant out of the discontinuity by capillary action, making it visible. (Correct answer)
To remove excess penetrant from the surface after the dwell time.
To etch the surface of the material to open up small cracks.

Correct answer: To draw the penetrant out of the discontinuity by capillary action, making it visible.

In a liquid dye penetrant inspection, the developer acts as a blotter, drawing the penetrant that has seeped into a crack or flaw back to the surface. This action, known as capillary action, makes the indication visible against the contrasting background of the developer.

Question 11: What is the correct firing order of the Lycoming O-320 four-cylinder horizontally-opposed aircraft engine?

1-3-4-2
1-2-4-3
1-4-2-3
1-3-2-4 (Correct answer)

Correct answer: 1-3-2-4

The Lycoming O-320 uses a 1-3-2-4 firing order to evenly distribute power strokes across the crankshaft and minimize vibration.

Question 12: What is the typical repair method for minor nicks and gouges on aluminum propeller blade leading edges?

Welding or brazing the damaged area
Applying epoxy filler to restore the original contour
Filing the nick smooth and blending it into the blade profile (Correct answer)
Replacing the blade immediately regardless of size

Correct answer: Filing the nick smooth and blending it into the blade profile

Minor nicks on aluminum propeller blades are repaired by carefully filing them smooth and blending the edges to prevent stress concentration and fatigue cracking.

Question 13: Why are aircraft maintenance records important for regulatory compliance?

To determine the number of flight hours.
To assess passenger comfort.
To track repairs and ensure compliance with safety regulations (Correct answer)
To monitor fuel consumption.

Correct answer: To track repairs and ensure compliance with safety regulations

Aircraft maintenance records are extremely important for regulatory compliance as they provide a verifiable history of all repairs, inspections, and modifications performed on an aircraft. These records demonstrate that the aircraft has been maintained according to established safety regulations and manufacturer guidelines. Regulatory bodies rely on these detailed logs to ensure ongoing airworthiness and accountability.

Question 14: What typically happens to a constant-speed propeller if the governor oil pressure is lost?

The propeller immediately overspeeds
The blades move to high pitch (coarse) or feather (Correct answer)
The blades move to low pitch (fine)
The blades freeze in their current position

Correct answer: The blades move to high pitch (coarse) or feather

Most constant-speed propellers are designed so that loss of oil pressure causes blades to move toward high pitch or feather as a fail-safe against overspeeding.

Question 15: An aircraft structural repair requires joining a carbon steel fitting to an aluminum alloy bulkhead. To prevent galvanic corrosion, what is the most critical action the AME must take?

Apply a thick layer of grease between the two surfaces.
Ensure a metal-to-metal contact for proper electrical bonding.
Isolate the dissimilar metals with a suitable non-conductive barrier or sealant. (Correct answer)
Use aluminum rivets to attach the steel fitting.

Correct answer: Isolate the dissimilar metals with a suitable non-conductive barrier or sealant.

Galvanic corrosion occurs when two dissimilar metals are in contact in the presence of an electrolyte. To prevent this, the metals must be electrically isolated from each other. This is typically achieved by applying a layer of primer, sealant, or a non-conductive material like vinyl tape between the surfaces.

Question 16: On an aircraft equipped with an Engine Indicating and Crew Alerting System (EICAS), a 'HYD QTY LOW' message appears in amber. What does this color typically signify?

A caution requiring immediate crew awareness and possible future action. (Correct answer)
A failure of the EICAS display unit itself.
An advisory message indicating a system's status.
A warning requiring immediate and urgent crew action.

Correct answer: A caution requiring immediate crew awareness and possible future action.

EICAS uses a standardized color scheme to denote the urgency of a message. Red is used for warnings (immediate action required), while amber (or yellow) is used for cautions, which require immediate crew awareness but may not require immediate action.

Question 17: Which system is responsible for the aircraft's landing gear operation?

The hydraulic system (Correct answer)
The environmental control system.
The fuel system.
The avionics system.

Correct answer: The hydraulic system

The hydraulic system is primarily responsible for the operation of the aircraft's landing gear. It provides the immense power needed to extend and retract the heavy landing gear components smoothly and reliably. This system ensures that the aircraft can safely take off and land by controlling the deployment and stowage of the gear.

Question 18: A maintenance technician is inspecting the combustion section of a gas turbine engine. Which of the following is a primary function of this section?

To add chemical energy to the compressed air by burning fuel at a constant pressure. (Correct answer)
To increase the mass of air flowing through the engine using bypass ducts.
To extract mechanical energy to power the engine's accessories.
To reduce the temperature of the gas stream before it enters the turbine.

Correct answer: To add chemical energy to the compressed air by burning fuel at a constant pressure.

The combustion chamber's primary role is to add energy to the system. It does this by mixing fuel with the high-pressure air from the compressor and burning the mixture. This combustion process occurs at a relatively constant pressure and dramatically increases the temperature and volume of the gases before they enter the turbine.

Question 19: A 'continuous-loop' fire detector (such as Kidde or Fenwal) works by:

Sampling nacelle air every few seconds
Measuring CO2 levels in the nacelle atmosphere
Sensing a change in electrical resistance or capacitance along a sensing element due to heat (Correct answer)
Detecting infrared signatures of flames using a photoelectric cell

Correct answer: Sensing a change in electrical resistance or capacitance along a sensing element due to heat

Continuous-loop systems use a sensing element that changes its electrical properties when heated, allowing fire detection anywhere along the loop's length.

Question 20: What is the primary operational characteristic of a constant-delivery hydraulic pump, such as a gear-type pump?

It requires no system pressure regulator as it self-regulates.
It varies its output flow based on system pressure demand.
It delivers a fixed volume of fluid per revolution, regardless of system pressure. (Correct answer)
It can only operate effectively at low RPMs.

Correct answer: It delivers a fixed volume of fluid per revolution, regardless of system pressure.

A constant-delivery (or constant-displacement) pump moves a fixed amount of fluid for each rotation of the pump's shaft. Because it is always attempting to move this fluid, the system must incorporate a pressure regulator or relief valve to divert excess flow and prevent over-pressurization when there is low demand.

Question 21: In accordance with 14 CFR Part 25, if a fuse is essential for safety in flight and is accessible to the flight crew, what is the minimum number of spare fuses that must be carried on board?

One spare for each essential fuse.
At least 25% of the number of fuses of each required rating.
At least 50% of the number of fuses of each required rating. (Correct answer)
A quantity sufficient to replace all essential fuses once.

Correct answer: At least 50% of the number of fuses of each required rating.

14 CFR § 25.1357(d) states: "Where fuses are used, there must be spare fuses for use in flight equal to at least 50% of the number of fuses of each rating required for complete circuit protection." This regulation ensures that sufficient spares are available for critical systems.

Question 22: A propeller exhibiting excessive vibration during ground runup most likely indicates:

Magneto timing error
Low engine oil pressure
Dynamic imbalance or damaged blades (Correct answer)
Incorrect fuel-air mixture

Correct answer: Dynamic imbalance or damaged blades

Excessive vibration during runup typically points to propeller dynamic imbalance, a bent blade, or damage that disrupts the even distribution of rotating mass.

Question 23: Why are aircraft fuselage structures designed with pressurization in mind?

To improve the aerodynamics of the aircraft.
To increase the aircraft's speed.
To ensure safety and comfort by maintaining cabin pressure (Correct answer)
To reduce weight and increase fuel efficiency.

Correct answer: To ensure safety and comfort by maintaining cabin pressure

Aircraft fuselage structures are designed with pressurization in mind to ensure the safety and comfort of occupants at high altitudes. As an aircraft climbs, the external atmospheric pressure drops significantly, making it unsafe for human respiration. Pressurization maintains a breathable and comfortable cabin pressure, preventing altitude sickness and allowing for normal physiological function.

Question 24: A technician is performing a sheet metal repair on a non-pressurized fuselage section. The maintenance manual specifies installing a doubler over the damaged area. What is the standard practice for the material thickness of this doubler?

Half the thickness of the original skin.
Two gauges thinner than the original skin.
The same thickness as the original skin.
One gauge thicker than the original skin. (Correct answer)

Correct answer: One gauge thicker than the original skin.

For a standard doubler repair, the doubler should be made of the same material as the original skin but should be one gauge (or size) thicker to ensure the repair restores the required strength to the damaged area.

Question 25: An AME is inspecting a composite control surface and finds a defect where the layers of the laminate have separated. What is this type of damage called?

Porosity
Microcracking
Debonding
Delamination (Correct answer)

Correct answer: Delamination

Delamination is the specific term for the separation of layers or plies within a laminated composite material. Debonding refers to the failure of an adhesive joint between two separate components, such as the skin and a stiffener.

Question 26: What is the role of the International Civil Aviation Organization (ICAO)?

It sets international safety and operational standards (Correct answer)
It regulates airport security procedures.
It monitors airline profits.
It controls the pricing of airline tickets.

Correct answer: It sets international safety and operational standards

The International Civil Aviation Organization (ICAO) plays a vital role in global aviation by setting international safety and operational standards. As a specialized agency of the United Nations, ICAO develops international Standards and Recommended Practices (SARPs) that member states adopt into their national aviation regulations. This harmonization of standards ensures a consistent level of safety and efficiency across international air travel.

Question 27: What does a sudden, significant drop in oil pressure during flight most likely indicate?

Normal pressure variation during a power reduction
The need to add oil at the next scheduled maintenance stop
A serious oil system malfunction such as a major leak or bearing failure requiring immediate action (Correct answer)
The engine has reached its normal operating temperature

Correct answer: A serious oil system malfunction such as a major leak or bearing failure requiring immediate action

A sudden oil pressure drop can indicate catastrophic oil loss, pump failure, or bearing failure — any of which can cause rapid engine destruction and require immediate emergency action.

Question 28: What is the most common cause of detonation in a reciprocating aircraft engine?

Operating with an excessively rich fuel-air mixture at cruise
Having too much ignition advance on both magnetos
Using aviation fuel with an octane rating lower than required (Correct answer)
Running the engine at low RPM and low power settings

Correct answer: Using aviation fuel with an octane rating lower than required

Using fuel with insufficient octane rating allows the compressed fuel-air charge to auto-ignite explosively (detonate) rather than burning in a controlled progressive manner.

Question 29: An aircraft is being prepared for flight at a remote station without ground power available. The AME needs to power the ground handling bus to operate the cargo bay lights and refueling system. Which power source would typically be used in this scenario?

The Auxiliary Power Unit (APU) generator. (Correct answer)
A Ram Air Turbine (RAT).
The main aircraft battery via an inverter.
The main engine-driven generators.

Correct answer: The Auxiliary Power Unit (APU) generator.

The ground handling bus is typically powered by the APU generator or an external power unit. Since external power is unavailable, the APU would be started to provide electrical power for ground operations like cargo lighting and refueling without needing to start the main engines.

Question 30: Which of the following best describes the primary function of an Attitude and Heading Reference System (AHRS)?

To provide long-range navigation data using GPS and inertial sensors.
To monitor engine parameters and alert the crew to system malfunctions.
To provide aircraft attitude (pitch, roll) and heading information to the flight displays. (Correct answer)
To calculate optimal flight paths and fuel consumption.

Correct answer: To provide aircraft attitude (pitch, roll) and heading information to the flight displays.

An Attitude and Heading Reference System (AHRS) is designed to replace traditional mechanical gyroscopic instruments. It uses solid-state sensors like accelerometers, gyroscopes, and magnetometers to compute and output the aircraft's pitch, roll, and yaw, which is then sent to the EFIS displays, autopilot, and other systems.

Question 31: During an inspection of an aluminum alloy landing gear component, a type of corrosion is found that proceeds along the grain boundaries of the metal. This form of corrosion is not readily visible on the surface in its early stages. What is this type of corrosion called?

Filiform Corrosion
Pitting Corrosion
Intergranular Corrosion (Correct answer)
Surface Corrosion

Correct answer: Intergranular Corrosion

Intergranular corrosion is an attack along the grain boundaries of an alloy. It is often caused by improper heat treatment and can significantly weaken the material from within, making it difficult to detect visually until it becomes severe.

Question 32: In a semi-monocoque fuselage, what is the primary function of stringers?

To serve as the primary attachment points for the wings and empennage.
To provide the main longitudinal strength and absorb bending loads.
To transfer skin stress to the formers and prevent buckling of the skin. (Correct answer)
To give the fuselage its cross-sectional shape and support concentrated loads.

Correct answer: To transfer skin stress to the formers and prevent buckling of the skin.

Stringers are longitudinal members that run the length of the fuselage. Their main purpose is to stiffen the skin and prevent it from buckling under compression and shear loads. They also transfer the stresses from the skin to the transverse frames (formers).

Question 33: What is the purpose of using diagnostic tools during troubleshooting?

To help identify and analyze faults in aircraft systems (Correct answer)
To speed up the repair process.
To reduce the need for inspections.
To monitor passenger comfort.

Correct answer: To help identify and analyze faults in aircraft systems

Diagnostic tools are specialized equipment designed to interface with aircraft systems to read data, interpret error codes, and perform system checks. Their purpose is to provide technicians with precise information about the health and performance of various components, helping to pinpoint the exact location and nature of a fault. This detailed analysis significantly reduces troubleshooting time and ensures accurate problem identification, leading to more effective repairs.

Question 34: During a routine inspection of a 24-volt lead-acid battery, an AME notices a significant difference in specific gravity readings between individual cells (e.g., one cell is 1.275 while another is 1.220). What is the most appropriate action?

Replace the battery as it is likely nearing the end of its service life. (Correct answer)
Add sulfuric acid to the low cell to equalize the specific gravity.
Charge the battery and re-check the specific gravity.
Top off the low cell with distilled water and return to service.

Correct answer: Replace the battery as it is likely nearing the end of its service life.

A specific gravity difference of 0.050 or more between cells in a lead-acid battery indicates that the battery is approaching the end of its useful life and should be considered for replacement. Topping off with water or simply recharging will not fix the underlying issue of a failing cell. Adding acid is never the correct procedure for adjusting specific gravity in the field.

Question 35: Introducing the wrong fuel type into an aircraft (e.g., Jet-A into an avgas aircraft) is specifically called:

Fuel substitution
Misfueling (Correct answer)
Cross-contamination
Incorrect servicing

Correct answer: Misfueling

Misfueling refers to the introduction of the wrong fuel type into an aircraft, which can cause engine failure and is one of the most serious maintenance errors.

Question 36: What is the role of the aviation safety management system (SMS)?

To track passenger complaints.
To monitor aircraft fuel consumption.
To provide a structured approach to identifying and managing aviation safety risks (Correct answer)
To assess flight crew performance.

Correct answer: To provide a structured approach to identifying and managing aviation safety risks

The aviation safety management system (SMS) is crucial because it provides a structured and systematic approach to identifying, assessing, and managing aviation safety risks. SMS moves beyond reactive incident investigation to proactively identify hazards and implement preventative measures. This comprehensive framework helps organizations continuously improve their safety performance and reduce the likelihood of accidents.

Question 37: How does preventive maintenance help in troubleshooting?

By reducing the number of inspections.
By delaying necessary repairs.
By reducing the number of technicians.
By addressing issues early and preventing breakdowns (Correct answer)

Correct answer: By addressing issues early and preventing breakdowns

Preventive maintenance involves scheduled inspections, servicing, and replacement of components before they fail. By proactively identifying and addressing minor issues or worn parts, preventive maintenance significantly reduces the likelihood of unexpected breakdowns and major system failures. This approach minimizes the need for reactive troubleshooting, enhances aircraft reliability, and ultimately contributes to safer and more efficient operations.

Question 38: Why is it essential to test the system after making a repair?

To prolong the repair process.
To confirm the repair was successful and the system operates as intended (Correct answer)
To check the cosmetic appearance.
To monitor the fuel efficiency.

Correct answer: To confirm the repair was successful and the system operates as intended

Testing the system after a repair is a critical step in aircraft maintenance to verify the effectiveness of the work performed. This post-repair testing ensures that the fault has been fully resolved and that the system is functioning correctly and safely according to its operational specifications. It prevents the aircraft from returning to service with lingering issues, thereby safeguarding flight safety and reliability.

Question 39: Which of the following NDT (Non-Destructive Testing) methods is most suitable for detecting subsurface delaminations in a carbon fiber composite wing skin that are not visible from the surface?

Eddy Current Inspection
Ultrasonic Inspection (Correct answer)
Dye Penetrant Inspection
Visual Inspection with a magnifying glass

Correct answer: Ultrasonic Inspection

Ultrasonic inspection is the most widely used and effective method for detecting subsurface defects like delaminations and disbonds in composite structures. High-frequency sound waves are introduced into the material, and the reflections are analyzed to identify internal flaws. Dye penetrant and visual inspections are limited to surface defects, and eddy current is primarily used for conductive materials.

Question 40: A pilot reports an intermittent 'red X' over the airspeed tape on their Primary Flight Display (PFD). From a maintenance perspective, which system is the most likely source of this failure?

The Attitude and Heading Reference System (AHRS)
The Air Data Computer (ADC) (Correct answer)
The display unit's internal symbol generator
The Flight Management System (FMS)

Correct answer: The Air Data Computer (ADC)

A 'red X' over a specific parameter like airspeed on an EFIS display indicates that the data is invalid or not being received. The Air Data Computer (ADC) is responsible for calculating airspeed, altitude, and vertical speed from pitot and static pressure inputs. A failure or data corruption from the ADC would cause the PFD to flag the related parameters as invalid.

Question 41: An aircraft fuel vent system primarily prevents:

Fuel overflow during ground fueling operations
Tank structural collapse or rupture from pressure differential during altitude changes (Correct answer)
Fuel evaporation during long-term storage
Fuel contamination from water entry through vent openings

Correct answer: Tank structural collapse or rupture from pressure differential during altitude changes

Fuel vent systems equalize pressure between tanks and atmosphere, preventing the tank structure from being subjected to excessive differential pressure as altitude changes.

Question 42: When selecting the proper wire size for an electrical installation in an aircraft, which of the following is a critical factor according to the American Wire Gauge (AWG) standard?

The wire's cross-sectional area. (Correct answer)
The color of the wire insulation.
The brand of the wire manufacturer.
The wire's flexibility rating.

Correct answer: The wire's cross-sectional area.

The American Wire Gauge (AWG) system sizes wires based on their diameter and corresponding cross-sectional area. A smaller AWG number indicates a larger wire diameter and greater current-carrying capacity. The cross-sectional area is the primary factor in determining the wire's resistance and ability to handle current without overheating.

Question 43: What is the purpose of dynamic counterweights installed on an aircraft reciprocating engine crankshaft?

To add rotational inertia for smoother idling at low RPM
To balance oil distribution through the crankshaft passages
To compensate for minor propeller blade track differences
To dampen torsional vibration at critical resonant RPM ranges (Correct answer)

Correct answer: To dampen torsional vibration at critical resonant RPM ranges

Dynamic counterweights are pendulum-type dampers tuned to absorb and cancel specific torsional vibration harmonics that develop at critical crankshaft speeds.

Question 44: What is the primary aerodynamic benefit of installing winglets on an aircraft's wingtips?

To act as primary control surfaces for roll.
To reduce induced drag by weakening wingtip vortices. (Correct answer)
To increase the structural rigidity of the wing.
To increase the critical Mach number.

Correct answer: To reduce induced drag by weakening wingtip vortices.

Winglets are designed to reduce induced drag, which is created by wingtip vortices. By limiting the formation and strength of these vortices, winglets improve the wing's efficiency, leading to benefits like reduced fuel consumption and increased range.

Question 45: What is the primary purpose of a constant-speed propeller governor?

To synchronize propeller rotation with engine firing order
To maintain a constant blade angle regardless of airspeed
To maintain a constant engine RPM by varying blade pitch (Correct answer)
To prevent propeller overspeed by reducing throttle

Correct answer: To maintain a constant engine RPM by varying blade pitch

A constant-speed governor maintains engine RPM by automatically adjusting propeller blade pitch to match varying flight conditions.

Question 46: Why must Jet-A fuel contain a static dissipater additive (SDA) during refueling operations?

Jet-A has no static concern and SDAs are optional
Jet-A must be bonded to ground but requires no chemical additives
Jet-A is naturally conductive and does not accumulate static charge
Jet-A is a poor electrical conductor and SDAs allow static charge to dissipate safely, reducing ignition risk (Correct answer)

Correct answer: Jet-A is a poor electrical conductor and SDAs allow static charge to dissipate safely, reducing ignition risk

Jet-A is a poor electrical conductor; static dissipater additives ensure accumulated static charge dissipates safely, reducing the risk of electrostatic ignition during fueling.

Question 47: Which of the following non-destructive testing (NDT) methods is most suitable for detecting subsurface defects in a non-ferrous material like an aluminum wing spar?

Magnetic Particle Inspection
Eddy Current Inspection
Ultrasonic Inspection (Correct answer)
Dye Penetrant Inspection

Correct answer: Ultrasonic Inspection

Ultrasonic inspection is highly effective for detecting subsurface flaws like cracks and corrosion in both ferrous and non-ferrous materials. Magnetic particle inspection only works on ferromagnetic materials. Dye penetrant is for surface-breaking defects only. Eddy current is primarily for surface and near-surface defects.

Question 48: What is the function of an aircraft troubleshooting checklist?

To monitor fuel efficiency.
To track the number of flight hours.
To provide a systematic approach to diagnosing and fixing problems (Correct answer)
To increase the complexity of the repair.

Correct answer: To provide a systematic approach to diagnosing and fixing problems

An aircraft troubleshooting checklist serves as a structured guide for maintenance technicians, outlining a logical sequence of steps to diagnose and resolve system malfunctions. It ensures that no critical steps are missed, promoting thoroughness and consistency in the troubleshooting process. This systematic approach helps in efficiently identifying the root cause of a problem, leading to accurate and effective repairs while minimizing diagnostic errors.

Question 49: What is the primary purpose of cylinder cooling fins and baffles on an air-cooled reciprocating engine?

To reduce the overall installed weight of the engine
To dampen mechanical vibration during high-power operation
To direct airflow over cylinder surfaces and maximize heat dissipation to the passing air (Correct answer)
To reduce intake air turbulence for more uniform combustion

Correct answer: To direct airflow over cylinder surfaces and maximize heat dissipation to the passing air

Baffles channel ram air tightly around the cylinders while fins dramatically increase the heat-transfer surface area, together maximizing the rate at which combustion heat is removed.

Question 50: What is the function of the aircraft's electrical system?

To power avionics, lights, and other essential equipment (Correct answer)
To provide power to the aircraft's engines.
To control fuel distribution.
To maintain cabin pressure.

Correct answer: To power avionics, lights, and other essential equipment

The aircraft's electrical system is fundamental for powering a vast array of components essential for flight. It supplies electricity to the avionics, cabin lighting, navigation lights, environmental control systems, and many other critical pieces of equipment. This robust system ensures that all necessary electrical functions are operational throughout the flight.

Question 51: How does non-destructive testing contribute to aircraft maintenance?

It tracks the number of passengers.
It helps with fuel management.
It detects internal and external damage without damaging the aircraft (Correct answer)
It focuses on external cosmetic defects.

Correct answer: It detects internal and external damage without damaging the aircraft

Non-destructive testing (NDT) is a vital aspect of aircraft maintenance because it allows technicians to detect internal and external damage without causing harm to the aircraft structure or components. Techniques like ultrasonic testing or X-rays can reveal hidden flaws such as cracks, corrosion, or delamination. This method ensures structural integrity is maintained without costly disassembly or damage.

Question 52: Centrifugal twisting moments (CTM) acting on propeller blades tend to:

Cause blades to feather automatically
Hold blades in a fixed position
Move blades toward low pitch (fine) (Correct answer)
Move blades toward high pitch (coarse)

Correct answer: Move blades toward low pitch (fine)

Centrifugal twisting moments act to flatten the blade toward low pitch because centrifugal force tends to rotate the blade chord into the plane of rotation.

Question 53: An AME is feeling rushed to complete a task before the end of their shift to avoid delaying a flight. This feeling is a classic example of which of the 'Dirty Dozen' in human factors?

Fatigue
Lack of Communication
Complacency
Pressure (Correct answer)

Correct answer: Pressure

The scenario describes feeling rushed due to a deadline, which is a textbook example of the human factor 'Pressure.' Pressure can be internal (self-induced) or external (from the organization) and often leads to cutting corners or making mistakes. The other options are also part of the Dirty Dozen but do not fit the scenario as well.

Question 54: During a shift handover, an AME verbally tells the incoming AME that the torque checks on the main landing gear are 'all done.' However, they fail to mention that one bolt could not be accessed and was not torqued. This omission is a critical failure of which human factor from the 'Dirty Dozen'?

Norms
Lack of Teamwork
Lack of Communication (Correct answer)
Lack of Assertiveness

Correct answer: Lack of Communication

This scenario is a classic example of a 'Lack of Communication.' The outgoing AME failed to convey complete and critical information to the incoming shift, creating a high-risk situation. Effective shift handovers require the clear and thorough exchange of all task-relevant information.

Question 55: What is the role of the aircraft's environmental control system?

To provide oxygen to passengers in case of an emergency.
To monitor fuel efficiency.
To regulate temperature, pressure, and air quality in the cabin (Correct answer)
To control engine temperature.

Correct answer: To regulate temperature, pressure, and air quality in the cabin

The aircraft's environmental control system (ECS) is designed to maintain a safe and comfortable cabin environment for passengers and crew. It actively regulates the cabin's temperature, pressure, and air quality, especially at high altitudes where outside conditions are extreme. This system is essential for preventing hypoxia and ensuring passenger well-being throughout the flight.

Question 56: On a hydraulically actuated variable-pitch propeller, what fluid is typically used as the actuating medium?

MIL-H-5606 hydraulic fluid
Water-glycol mixture
Skydrol hydraulic fluid
Engine oil (Correct answer)

Correct answer: Engine oil

Most variable-pitch propeller systems use engine oil as the actuating fluid because it is readily available and provides the required pressure.

Question 57: What is the primary function of a Constant Speed Drive (CSD) unit in an aircraft's AC electrical system?

To convert variable engine RPM into a constant generator RPM. (Correct answer)
To regulate the voltage output of the generator.
To act as a circuit breaker in case of an electrical fault.
To rectify alternating current (AC) to direct current (DC).

Correct answer: To convert variable engine RPM into a constant generator RPM.

The primary purpose of a Constant Speed Drive (CSD) is to take the variable rotational speed from the engine's accessory gearbox and convert it into a constant speed for the AC generator. This ensures the generator produces a stable frequency (typically 400 Hz) required by aircraft systems, regardless of changes in engine thrust.

Question 58: What is the function of the aircraft's avionics system?

To control the aircraft's speed.
To manage the fuel system.
To monitor and control the aircraft's electronics, navigation, and communication systems (Correct answer)
To regulate cabin pressure.

Correct answer: To monitor and control the aircraft's electronics, navigation, and communication systems

The aircraft's avionics system encompasses all the electronic systems used for flight control, navigation, communication, and monitoring. It acts as the aircraft's central nervous system, processing vast amounts of data to assist the pilot and automate various functions. This system is indispensable for modern flight operations, ensuring safe and efficient travel.

Question 59: What is the primary purpose of the aircraft's hydraulic system?

To control the aircraft's engine performance.
To provide power for critical flight functions such as landing gear and brakes (Correct answer)
To monitor the aircraft's fuel levels.
To manage the aircraft's electrical systems.

Correct answer: To provide power for critical flight functions such as landing gear and brakes

The aircraft's hydraulic system is crucial for operating heavy-duty components that require significant force. It uses pressurized fluid to power critical flight functions, such as extending and retracting the landing gear, operating the brakes, and moving flight control surfaces. This system ensures reliable and powerful actuation for essential aircraft operations.

Question 60: What is the primary goal of aviation safety regulations?

To regulate airline schedules.
To ensure the safety of passengers, crew, and aircraft (Correct answer)
To increase airline profits.
To monitor airline employee behavior.

Correct answer: To ensure the safety of passengers, crew, and aircraft

The primary goal of aviation safety regulations is to ensure the highest possible level of safety for passengers, crew, and the aircraft itself. These regulations establish standards and procedures for aircraft design, manufacturing, operation, and maintenance. By enforcing these rules, regulatory bodies aim to minimize risks and prevent accidents across the aviation industry.

Question 61: What does an excessive RPM drop on one magneto during the pre-takeoff magneto check most likely indicate?

A defect in that magneto's circuit such as a fouled spark plug, faulty ignition lead, or internal magneto fault (Correct answer)
The engine has not yet reached proper operating temperature
The engine is operating normally and within limits on that magneto
Carburetor heat is inadvertently still applied during the run-up

Correct answer: A defect in that magneto's circuit such as a fouled spark plug, faulty ignition lead, or internal magneto fault

An excessive single-magneto RPM drop beyond the manufacturer's limit indicates a problem in that ignition circuit, most commonly a fouled or failed spark plug or a defective ignition lead.

Question 62: During a maintenance task, an AME needs to safety wire a series of three bolts on an engine accessory case. What is the correct procedure for installing the safety wire?

The wire should be routed in a way that the tension on the wire counteracts the tendency of the bolt to loosen. (Correct answer)
A single wire should be used, passing through each bolt head and twisted only at the end.
No more than two bolts should ever be secured with a single piece of safety wire.
The wire should be installed so that it pulls the bolt head in the loosening direction.

Correct answer: The wire should be routed in a way that the tension on the wire counteracts the tendency of the bolt to loosen.

The fundamental principle of safety wiring is to install the wire in such a manner that it creates a tightening force on the fastener if it starts to loosen. This is often referred to as wiring 'righty-tighty'. While a common rule of thumb is to safety no more than three bolts together, the most critical aspect is the direction of pull.

Question 63: In the context of the SHEL model for analyzing human factors, which component represents the rules, procedures, and manuals used by maintenance personnel?

Software (Correct answer)
Liveware
Environment
Hardware

Correct answer: Software

The SHEL model uses 'Software' to describe the non-physical aspects of the system, including rules, procedures, regulations, manuals, and checklists that govern the maintenance task. 'Hardware' refers to tools and equipment, 'Environment' is the physical and organizational setting, and 'Liveware' refers to the human element.

Question 64: Which of the following digital data bus standards is characterized by a unidirectional, twisted-pair wire connection that transmits 32-bit words at either a low speed (12.5 kbps) or a high speed (100 kbps)?

MIL-STD-1553
ARINC 664 (AFDX)
ARINC 429 (Correct answer)
CAN bus

Correct answer: ARINC 429

ARINC 429 is the predominant avionics data bus for commercial and transport aircraft. Its key characteristics include using a unidirectional (one transmitter, up to 20 receivers), twisted-pair wire, and transmitting 32-bit data words at either a low speed (12.5-14.5 kbps) or high speed (100 kbps).

Question 65: At what point in the 4-stroke operating cycle does ignition typically occur?

At the start of the exhaust stroke
At the midpoint of the power stroke
Near the end of the compression stroke slightly before TDC (Correct answer)
At the beginning of the intake stroke

Correct answer: Near the end of the compression stroke slightly before TDC

Ignition is timed to occur slightly before TDC on the compression stroke so that maximum combustion pressure develops just after TDC for optimal power output.

Question 66: Why is pilot training compliance crucial to aviation safety?

To ensure pilots can manage aircraft systems.
To reduce flight time.
To limit the number of passengers on board.
To ensure pilots meet safety standards and are qualified for safe flight operations (Correct answer)

Correct answer: To ensure pilots meet safety standards and are qualified for safe flight operations

Pilot training compliance is fundamental to aviation safety because it ensures that pilots possess the necessary knowledge, skills, and experience to operate aircraft safely and proficiently. Regulatory bodies set stringent standards for initial training, certification, and recurrent checks to ensure pilots are competent in all aspects of flight, including emergency procedures. This rigorous adherence to training protocols minimizes human error and significantly contributes to the overall safety of flights.

Question 67: What is the purpose of the aircraft's wing structure?

To manage engine performance.
To generate lift and support the aircraft's weight (Correct answer)
To control the aircraft's speed.
To control the aircraft's altitude.

Correct answer: To generate lift and support the aircraft's weight

The primary purpose of the aircraft's wing structure is to generate lift, which counteracts gravity and allows the aircraft to fly. The shape of the wings, known as an airfoil, creates a pressure differential that produces upward force. Additionally, wings are designed to support the aircraft's weight, including engines and fuel, and house various systems.

Question 68: A castellated nut has been torqued to the minimum specified value, but the cotter pin hole does not align with any of the slots. According to standard maintenance practices, what is the correct procedure?

Tighten the nut slightly to align with the next available slot, without exceeding the maximum torque value. (Correct answer)
Drill a new cotter pin hole in the bolt.
Loosen the nut to the previous slot to align the hole.
Replace the washer with a thinner one and re-torque.

Correct answer: Tighten the nut slightly to align with the next available slot, without exceeding the maximum torque value.

Standard practice dictates that after reaching the minimum torque value, you may tighten the nut further to align the cotter pin hole with the next slot, as long as the maximum specified torque is not exceeded. Loosening the nut would result in it being under-torqued.

Question 69: What is 'blade angle' in propeller terminology?

The angle at which the propeller is mounted on the engine shaft
The angle between the blade chord line and the plane of rotation (Correct answer)
The sweep angle of the blade from root to tip
The angle between the leading edge and trailing edge

Correct answer: The angle between the blade chord line and the plane of rotation

Blade angle (pitch angle) is measured between the blade chord line and the plane of rotation, determining how much air is deflected with each revolution.

Question 70: Why is the Federal Aviation Administration (FAA) critical to aviation safety?

It schedules flights.
It reduces operational costs.
It establishes and enforces aviation safety regulations and standards (Correct answer)
It monitors airline profits.

Correct answer: It establishes and enforces aviation safety regulations and standards

The Federal Aviation Administration (FAA) is critical to aviation safety in the United States because it is the primary regulatory body responsible for establishing and enforcing aviation safety regulations and standards. The FAA oversees all aspects of civil aviation, including aircraft certification, pilot licensing, air traffic control, and maintenance practices. Its rigorous oversight ensures a consistent level of safety across the national airspace.

Question 71: How is compression ratio defined for a reciprocating engine cylinder?

The ratio of cylinder bore diameter to piston stroke length
The ratio of intake manifold pressure to exhaust back-pressure
The ratio of fuel injection pressure to induction air pressure
The ratio of total cylinder volume at BDC to clearance volume at TDC (Correct answer)

Correct answer: The ratio of total cylinder volume at BDC to clearance volume at TDC

Compression ratio equals the total cylinder volume when the piston is at BDC (swept volume plus clearance volume) divided by the remaining clearance volume at TDC.

Question 72: An Approved Maintenance Organization (AMO) in Canada is primarily regulated under which part of the Canadian Aviation Regulations (CARs)?

CAR Part VII - Commercial Air Services
CAR Part IV - Personnel Licensing and Training
CAR Part V - Airworthiness (Correct answer)
CAR Part VI - General Operating and Flight Rules

Correct answer: CAR Part V - Airworthiness

CAR Part V, specifically Subpart 573 (CAR 573), covers the approval and regulation of Approved Maintenance Organizations (AMOs). This part details the requirements for facilities, personnel, equipment, and procedures that an organization must meet to be certified to perform maintenance on aircraft.

Question 73: During an annual inspection of a fixed-pitch propeller, which condition requires blade replacement rather than repair?

Minor paint chipping on the blade tip
Slight surface scratches on the blade shank
A crack of any length on the blade face (Correct answer)
Small nicks less than 1/8 inch deep on the leading edge

Correct answer: A crack of any length on the blade face

Any crack in a propeller blade is cause for rejection because cracks propagate rapidly under cyclical loading and can lead to catastrophic blade separation.

Question 74: Which of the following is a critical safety and maintenance consideration when working with phosphate ester-based hydraulic fluids such as Skydrol?

It has a low flash point, making it more flammable than mineral-based fluids.
It is highly compatible with natural rubber seals and most standard paints.
It is non-toxic and requires no special personal protective equipment.
It is an excellent paint remover and is harmful to many traditional aircraft finishes and plastics. (Correct answer)

Correct answer: It is an excellent paint remover and is harmful to many traditional aircraft finishes and plastics.

Phosphate ester-based hydraulic fluids like Skydrol are known for their excellent fire resistance but are also powerful solvents. They are incompatible with many materials, including most standard paints, plastics, and natural rubber seals, which they can soften and destroy. Proper PPE, including gloves and goggles, is required as the fluid is irritating to human tissue.

Question 75: Why is it important to follow repair manuals during aircraft repairs?

To improve the aesthetic appearance of the aircraft.
To ensure the repair is done safely and in accordance with manufacturer guidelines (Correct answer)
To reduce the number of inspections.
To make the repair process quicker.

Correct answer: To ensure the repair is done safely and in accordance with manufacturer guidelines

Repair manuals contain detailed, step-by-step instructions, specifications, and warnings provided by the aircraft manufacturer. Adhering to these manuals during repairs is crucial to ensure that every procedure is performed correctly, safely, and to the exact standards required for airworthiness. Deviating from these guidelines can compromise the aircraft's structural integrity, operational reliability, and overall safety, potentially leading to catastrophic failures.

Question 76: The 'beta range' in turboprop propeller operation refers to:

Ground operation range where blade angle is directly controlled by the power lever (Correct answer)
Emergency feather position
Reverse thrust range during landing rollout only
Normal in-flight constant-speed operation

Correct answer: Ground operation range where blade angle is directly controlled by the power lever

The beta range is a ground operating mode where the pilot directly controls blade pitch through the power lever rather than through the governor, enabling ground maneuvering and reverse thrust.

Question 77: Which component of the aircraft's fuel system ensures consistent fuel delivery?

The fuel pump (Correct answer)
The fuel tank.
The fuel filter.
The fuel gauge.

Correct answer: The fuel pump

The fuel pump is a vital component in an aircraft's fuel system, responsible for drawing fuel from the tanks and delivering it under pressure to the engines. This consistent fuel delivery is essential for engine operation, ensuring a steady and reliable supply regardless of flight attitude or altitude. Without a functioning fuel pump, engines would not receive the necessary fuel to operate.

Question 78: What is 'propeller feathering'?

Rotating blades to approximately 90° pitch to minimize drag on a failed engine (Correct answer)
Rotating blades to minimum pitch for maximum thrust
Applying a protective coating to the leading edges of the blades
Balancing the propeller by adding weights to blade tips

Correct answer: Rotating blades to approximately 90° pitch to minimize drag on a failed engine

Feathering turns propeller blades edge-on to the airflow (approximately 90°) to reduce drag when an engine fails in flight.

Question 79: According to Canadian Aviation Regulations (CARs), what is the minimum age requirement for an individual to be issued an Aircraft Maintenance Engineer (AME) licence?

18 years
21 years (Correct answer)
There is no minimum age, only an experience requirement.
25 years

Correct answer: 21 years

CAR 566.03 outlines the requirements for the issuance of an AME Licence. Among these requirements, an applicant must have attained the age of 21 years prior to the licence being issued.

Question 80: Which FAA regulation governs the type certification of propellers?

14 CFR Part 21
14 CFR Part 35 (Correct answer)
14 CFR Part 23
14 CFR Part 43

Correct answer: 14 CFR Part 35

14 CFR Part 35 establishes the airworthiness standards specifically for propeller type certification in the United States.

Question 81: In a modern Flight Management System (FMS), what is the primary source of real-time, high-accuracy position information used to continuously update and correct the aircraft's calculated position?

Air Data Computer (ADC) calculations
VOR/DME radio navigation inputs
Global Positioning System (GPS) (Correct answer)
Inertial Reference System (IRS) free-inertial calculation

Correct answer: Global Positioning System (GPS)

While the FMS uses a blend of sensors for position determination, the Global Positioning System (GPS) is the primary source for accurate, continuous, and global position updating. The Inertial Reference System (IRS) calculates position but is subject to drift over time and relies on updates from GPS to maintain its accuracy.

Question 82: Why are airport security regulations important?

To ensure safety by preventing security threats and unauthorized access (Correct answer)
To increase airport profits.
To monitor the behavior of airport staff.
To manage passenger comfort.

Correct answer: To ensure safety by preventing security threats and unauthorized access

Airport security regulations are paramount for safeguarding passengers, staff, and aircraft from potential threats. These regulations establish rigorous protocols, such as passenger and baggage screenings and access controls, specifically designed to deter and detect security breaches. By preventing unauthorized access or the introduction of dangerous items, they maintain a secure environment essential for safe aviation operations.

Question 83: Which component in a fuel system prevents fuel from flowing backward from the engine toward the tanks?

Firewall shutoff valve
Check valve (Correct answer)
Fuel strainer
Fuel selector valve

Correct answer: Check valve

Check valves are one-way valves that allow fuel flow in only one direction, preventing reverse flow that could drain lines or allow unintended fuel migration between tanks.

Question 84: Which of the following describes a 'trip-free' circuit breaker?

A circuit breaker that cannot be manually reset until it has cooled down.
A circuit breaker that will open a circuit even if the operating control is held in the 'ON' position. (Correct answer)
A circuit breaker that requires a special tool to be reset.
A circuit breaker that can be reset remotely from the cockpit.

Correct answer: A circuit breaker that will open a circuit even if the operating control is held in the 'ON' position.

A 'trip-free' circuit breaker is a safety feature designed to ensure that it will open the circuit during an overload or fault condition, regardless of whether the manual operating lever or button is held in the closed (ON) position. This prevents the crew from forcing a circuit to remain closed against a persistent fault.

Question 85: Which of the following is considered the primary cause of wear and malfunction in the majority of aircraft hydraulic systems?

Fluid viscosity breakdown due to high temperatures.
Particulate contamination in the fluid. (Correct answer)
Chemical breakdown from exposure to UV light.
Entrained air causing cavitation.

Correct answer: Particulate contamination in the fluid.

Particulate contamination is widely recognized as the leading cause of hydraulic system problems, accounting for a vast majority of failures. Tiny particles of metal, rubber, and dirt act as an abrasive, causing scoring and wear on the precision-machined surfaces of pumps, valves, and actuators, which leads to internal leakage, reduced efficiency, and eventual component failure.

Question 86: Propeller 'tracking' is a maintenance check that verifies:

The propeller governor is correctly calibrated
Blade angle settings are within specified tolerance
The propeller RPM is within limits
Each blade tip follows the same plane of rotation (Correct answer)

Correct answer: Each blade tip follows the same plane of rotation

Tracking ensures all propeller blade tips rotate in the same plane, indicating the hub is not bent and blades are properly installed.

Question 87: Which of the following is the BEST example of an 'error-trapping' technique in aircraft maintenance?

An independent inspection performed by a second qualified AME. (Correct answer)
Using a detailed checklist for a complex task.
Attending a human factors refresher course annually.
Taking a short break when feeling fatigued.

Correct answer: An independent inspection performed by a second qualified AME.

Error-trapping involves implementing a specific check or process designed to catch an error before it has consequences. An independent inspection is a classic example, as its sole purpose is to verify the work of the first AME and 'trap' any potential errors. While checklists and managing fatigue are important for error prevention, the independent check is a direct trapping mechanism.

Question 88: Which of the following describes the primary function of the turbine section in a gas turbine engine?

To drive the compressor and accessories by extracting energy from the hot gas stream. (Correct answer)
To increase the pressure of the air entering the combustion chamber.
To mix fuel with compressed air and ignite the mixture.
To decrease the velocity of the exhaust gases to prevent structural damage.

Correct answer: To drive the compressor and accessories by extracting energy from the hot gas stream.

The turbine section's main purpose is to extract kinetic and thermal energy from the high-velocity hot gases exiting the combustion chamber. This extracted energy is converted into mechanical power to rotate the main shaft, which in turn drives the compressor section and engine-driven accessories.

Question 89: To maintain the recency of an AME licence, what is the minimum duration an AME must have performed or supervised maintenance, or acted in an executive capacity in a maintenance organization, within the preceding 24 months?

18 months
6 months (Correct answer)
3 months
12 months

Correct answer: 6 months

CAR 566.05 specifies the recency requirements for an AME licence. To exercise the privileges of the licence, the holder must, within the preceding 24 months, have performed or supervised aircraft maintenance, acted in an executive capacity, or taught aviation maintenance for at least a six-month period.

Question 90: The primary purpose of a firewall fuel shutoff valve is to:

Regulate fuel pressure to the carburetor
Prevent fuel flow when the engine is not running
Isolate the fuel supply from the engine compartment in case of fire or emergency (Correct answer)
Balance fuel flow between multiple carburetors

Correct answer: Isolate the fuel supply from the engine compartment in case of fire or emergency

The firewall shutoff valve allows the crew to cut off fuel flow to the engine compartment in an emergency, starving a fire of its fuel source.

Question 91: In the context of the Brayton cycle as it applies to a gas turbine engine, what process occurs within the combustion chamber?

Constant-pressure heat addition (Correct answer)
Isentropic compression
Constant-volume heat addition
Isentropic expansion

Correct answer: Constant-pressure heat addition

The Brayton cycle is the thermodynamic model for gas turbine engines. The process within the combustor, where fuel is burned to heat the compressed air, is modeled as a constant-pressure (isobaric) heat addition process.

Question 92: An AME has just completed a scheduled 100-hour inspection on a privately operated, Canadian-registered Cessna 172. Which of the following is the correct action the AME must take to approve the aircraft for return to service?

Complete and sign a maintenance release in the aircraft's technical records. (Correct answer)
Verbally inform the owner that the aircraft is ready for flight.
Issue a new Certificate of Airworthiness for the aircraft.
Notify the nearest Transport Canada Centre of the completed inspection.

Correct answer: Complete and sign a maintenance release in the aircraft's technical records.

CAR 571.10 requires that a maintenance release be completed after specified maintenance tasks, including scheduled inspections. This release is a formal declaration entered into the aircraft's technical records, signed by a qualified AME, certifying that the maintenance was performed in accordance with applicable standards of airworthiness.

Question 93: What is the function of the aircraft's emergency systems in compliance with safety regulations?

To improve the aircraft's aerodynamics.
To monitor the fuel system.
To increase the weight of the aircraft.
To provide essential safety systems for emergency situations (Correct answer)

Correct answer: To provide essential safety systems for emergency situations

Aircraft emergency systems are critical components mandated by safety regulations to ensure the survival and well-being of occupants during unforeseen events. These systems, which include emergency exits, oxygen masks, and fire suppression, are designed to activate in situations like engine failure or cabin depressurization. Their primary function is to provide immediate and effective responses, maximizing safety and minimizing risks when an emergency occurs.

Question 94: What is the primary function of a fuel boost pump in an aircraft fuel system?

To filter contaminants from fuel before engine delivery
To transfer fuel between tanks for lateral balance only
To measure fuel quantity electronically
To maintain positive fuel pressure, prevent vapor lock, and supply the engine-driven pump (Correct answer)

Correct answer: To maintain positive fuel pressure, prevent vapor lock, and supply the engine-driven pump

Fuel boost pumps maintain positive pressure in the supply line to prevent vapor lock and ensure adequate fuel delivery to the engine-driven pump, especially during takeoff and climb.

Question 95: What is the purpose of a fuel tank bladder (fuel cell)?

To increase the structural rigidity of the wing
To measure fuel quantity using internal pressure sensors
To provide a flexible, leak-resistant liner inside a structural fuel bay (Correct answer)
To filter fuel as it exits the tank

Correct answer: To provide a flexible, leak-resistant liner inside a structural fuel bay

Fuel bladders are flexible, fuel-resistant bags installed inside structural cavities that provide leak-proof containment while conforming to the shape of the tank bay.

Question 96: A maintenance engineer is working a long overnight shift and recognizes they are feeling the effects of fatigue. According to human factors principles, what is the most effective immediate countermeasure to mitigate the risk of error?

Rushing to complete the final tasks to finish the shift sooner.
Drinking a large coffee for a quick energy boost.
Informing their supervisor and taking a short, strategic nap if permitted. (Correct answer)
Increasing the hangar lighting to maximum brightness.

Correct answer: Informing their supervisor and taking a short, strategic nap if permitted.

While caffeine can provide a temporary mask for fatigue, it doesn't resolve the underlying physiological need for rest. The most effective physiological countermeasure for fatigue is sleep. Taking a short, strategic nap has been shown to improve performance. Informing a supervisor is also a critical safety step in a Fatigue Risk Management System (FRMS).

Question 97: What is the significance of air traffic control (ATC) regulations?

To guide aircraft safely and efficiently in the airspace (Correct answer)
To monitor passenger behavior.
To improve flight entertainment.
To manage flight crew salaries.

Correct answer: To guide aircraft safely and efficiently in the airspace

Air traffic control (ATC) regulations are significant because they provide the framework for guiding aircraft safely and efficiently through the airspace. These regulations dictate procedures for takeoff, landing, and en-route flight, preventing collisions and managing the flow of air traffic. ATC ensures an organized and secure environment for all aircraft operations.

Question 98: An aircraft's turboprop engine utilizes its gas turbine core primarily to do what?

Drive a large fan for high-bypass airflow.
Drive a propeller through a reduction gearbox. (Correct answer)
Heat the air for a ramjet effect at high speeds.
Generate the majority of its thrust from the high-velocity exhaust gases.

Correct answer: Drive a propeller through a reduction gearbox.

In a turboprop engine, the vast majority of the energy produced by the gas turbine section is used to drive a propeller via a reduction gearbox. The propeller then accelerates a large mass of air, generating most of the engine's thrust. A small amount of thrust is produced by the exhaust gases.

Question 99: What role does an aircraft maintenance log play in inspection?

To calculate the aircraft's fuel efficiency.
To track the history of maintenance and repairs (Correct answer)
To identify passenger preferences.
To monitor aircraft speed.

Correct answer: To track the history of maintenance and repairs

An aircraft maintenance log plays a crucial role in inspection by providing a comprehensive historical record of all maintenance and repairs performed on the aircraft. This log allows technicians to track component lifespans, identify recurring issues, and ensure that all scheduled maintenance has been completed. It is an essential document for regulatory compliance and ensuring the aircraft's ongoing airworthiness.

Question 100: Who holds the ultimate responsibility for ensuring that all required maintenance has been carried out before an aircraft flight?

The AME who signed the last maintenance release.
The Pilot-in-Command (PIC).
The Approved Maintenance Organization (AMO).
The aircraft owner or operator. (Correct answer)

Correct answer: The aircraft owner or operator.

While the AME is responsible for the work they perform and certify, regulations across jurisdictions (including ICAO standards, EASA, FAA, and Transport Canada) place the final responsibility for the aircraft's airworthy condition on the owner or operator. They must ensure all required maintenance, including compliance with airworthiness directives, is completed before flight.

Aircraft Maintenance Engineer (AME) License Exams

The AME License Exams certify individuals to inspect, maintain, and repair aircraft, ensuring airworthiness and safety.

100

Questions

120 min

Time Limit

70%

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