Aircraft Systems and Aerodynamics Quiz
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Questions and Answers

What happens to lift production when the angle of attack is increased?

  • Lift remains unchanged
  • Lift increases up to a certain point (correct)
  • Lift becomes unpredictable
  • Lift decreases significantly

What is the primary function of flaps on an aircraft?

  • Reduce drag during cruise
  • Improve fuel efficiency
  • Enhance lift during takeoff and landing (correct)
  • Increase wing surface area

Which type of stability is defined as an aircraft's ability to return to level flight after a roll disturbance?

  • Longitudinal stability
  • Dynamic stability
  • Lateral stability (correct)
  • Directional stability

How does camber affect the lift produced by an aircraft wing?

<p>Higher camber results in higher lift (A)</p> Signup and view all the answers

What does longitudinal instability in an aircraft indicate?

<p>Uncontrollable pitching of the aircraft (C)</p> Signup and view all the answers

Which component of the Environmental Control System filters and conditions outside air for the aircraft?

<p>Air cycle machine (B)</p> Signup and view all the answers

What is the primary function of an Emergency Locator Transmitter (ELT)?

<p>Send out a distress beacon (D)</p> Signup and view all the answers

Which material is primarily used for manufacturing turbine blades due to high-temperature resistance?

<p>Nickel superalloy (D)</p> Signup and view all the answers

Why is it important to maintain the correct weight and balance record for an aircraft?

<p>To ensure the aircraft's center of gravity does not move too far from its center of lift (C)</p> Signup and view all the answers

What is the primary purpose of hydraulic systems in aircraft?

<p>To power flight controls, landing gears, and brakes (D)</p> Signup and view all the answers

What is meant by the term 'all up weight' in aviation?

<p>The total weight of an aircraft at the start of a flight (D)</p> Signup and view all the answers

How does rigging affect an aircraft's performance?

<p>It ensures that all components are installed symmetrically for stability (D)</p> Signup and view all the answers

What is the function of hydraulic pressure relief valves in an aircraft hydraulic system?

<p>To prevent overpressure from damaging components (D)</p> Signup and view all the answers

What material is primarily used in aircraft landing gear for its strength and durability?

<p>Titanium alloy (D)</p> Signup and view all the answers

What should be done if hydraulic fluid is found below the recommended level during maintenance?

<p>Check all components in the hydraulic system for leaks and top-up if none found (D)</p> Signup and view all the answers

How can water contamination in fuel be visually detected?

<p>By observing a layer of water in the fuel sample (C)</p> Signup and view all the answers

What is the primary advantage of tubeless tires compared to traditional tires with inner tubes?

<p>More puncture resistant (C)</p> Signup and view all the answers

What type of landing gear strut is commonly used in modern aircraft?

<p>Oleo strut (B)</p> Signup and view all the answers

Flashcards

All Up Weight

The total weight of an aircraft at the start of a flight, including all cargo, passengers, and fuel.

What material is used in aircraft landing gear?

A titanium alloy is mostly used due to its strength and durability.

What is the primary function of hydraulic systems in aircraft?

To power flight controls, landing gears, and brakes.

How does the landing gear shock strut cushion impact?

The shock strut cushions landing impact by using compressed air and hydraulic fluid.

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What is the purpose of hydraulic pressure relief valves?

It prevents overpressure from damaging components.

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How does rigging affect an aircraft's center of gravity?

This ensures that all components are installed symmetrically for stability.

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What is the primary difference between LOX and OBOGS?

LOX has a limited supply, while OBOGS generates oxygen continuously.

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How do smoke detectors in aircraft cabins work?

They detect changes in air particles to detect smoke.

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What is the primary function of an aircraft's utility hydraulic system?

To power utility systems such as thrust reversers and slats.

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What is the function of the refueling shut-off valve?

The refueling shut-off valve prevents overfilling of the fuel tank during the refueling process.

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What happens to lift production when the angle of attack is increased?

The angle of attack is the angle between the chord line of the wing and the relative wind. Increasing the angle of attack increases the lift produced by the wing, up to a certain point. After that, lift begins to decrease, and stall may occur.

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What is the primary function of flaps on an aircraft?

Flaps are movable control surfaces located on the trailing edge of the wings. They are primarily used to increase lift during takeoff and landing. They also increase drag, which helps slow down the aircraft during landing.

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What does longitudinal instability in an aircraft indicate?

Longitudinal stability refers to an aircraft's ability to return to its original pitch attitude after being disturbed. It's essential for maintaining a stable flight path.

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Which component of the Environmental Control System filters and conditions outside air for the aircraft?

An air cycle machine is a component of an aircraft's Environmental Control System that takes in outside air and conditions it for use in the cabin. It filters, cools, and pressurizes the air.

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What is the function of an emergency oxygen supply in aircraft?

The primary function of an emergency oxygen supply in aircraft is to provide supplemental oxygen to passengers and crew in case of a cabin pressure loss.

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What is the primary function of a shut-off valve in the fueling process?

A shut-off valve is essential in the fueling process to prevent overfilling the fuel tank. Overfilling can lead to issues like spillage and fuel system malfunctions.

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What does the fuel level indicator display during flight?

The fuel level indicator displays the remaining fuel in the tanks during flight. It helps the pilot monitor fuel levels and plan for refuelling.

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What is the primary function of an Emergency Locator Transmitter (ELT)?

An Emergency Locator Transmitter (ELT) is a beacon that automatically sends a distress signal for rescuers to locate the aircraft in distress. It's essential for search and rescue efforts.

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Study Notes

Aircraft Systems and Aerodynamics

  • Lift Production and Angle of Attack: Increasing the angle of attack increases lift production.
  • Aircraft Flaps: Flaps primarily increase lift and drag at lower speeds, aiding in takeoff and landing.
  • Aircraft Stability: Directional stability is the ability of an aircraft to return to level flight after a yaw disturbance. Lateral stability is the aircraft's ability to return to level flight after a roll disturbance.
  • Camber and Lift: Higher camber on a wing results in higher lift.
  • Longitudinal Instability: Longitudinal instability indicates uncontrollable pitching of the aircraft.
  • Aircraft Maneuvers: Pitching involves rotating the aircraft around its lateral axis.
  • Environmental Control System (ECS): The air cycle machine filters and conditions the outside air for the aircraft's cabin.
  • Emergency Oxygen Supply: Provides supplemental oxygen to passengers and crew.
  • Refueling Shut-off Valve: Prevents overfilling of the fuel tank.
  • Pressurized Fuel Feed Systems: Do not reduce fuel consumption.
  • Fuel Level Indicator: Displays the remaining fuel in the tanks during flight.
  • Emergency Locator Transmitter (ELT): Sends a distress beacon to help rescuers locate a distressed aircraft.
  • Turbine Blade Material: Nickel superalloy is primarily used for turbine blades due to its high-temperature resistance.
  • Bimetallic Fire Detectors: They are entirely mechanical and not susceptible to power failures.
  • Oil Cooler Function: Cools down the hot lubricating oil in the aircraft engine.
  • Titanium in Aircraft Construction: Titanium has a high strength-to-weight ratio and high thermal resistance.
  • Weight and Balance: Maintaining correct weight and balance records ensures the aircraft's center of gravity doesn't move too far from its center of lift.
  • Crankshaft TDC: The crankshaft reaches its top dead center (TDC) position during the compression stroke of a 4-stroke cycle.
  • Rigging and Center of Gravity: Proper rigging ensures all components are installed symmetrically for stability and correct center of gravity.
  • Hydraulic Pressure Relief Valves: Prevent overpressure from damaging hydraulic components.
  • Landing Gear Material: Titanium alloy is often used in landing gear due to its strength and durability.
  • Utility Hydraulic System: Powers utility systems like thrust reversers and slats.
  • All-Up Weight: The total weight of an aircraft at the start of a flight.
  • Water Contamination Detection: Water in fuel can be visually detected by observing a layer of water in the fuel sample.
  • Hydraulic Systems in Aircraft: Power flight controls, landing gears, and brakes.
  • Hydraulic Fluid Levels: If hydraulic fluid is below the recommended level, check for leaks and top up if there are no leaks.
  • Tubeless Tires: Offer improved puncture resistance compared to tires with inner tubes.
  • Landing Gear Maintenance: Update SAF 1400-6 (Change of Serviceability and Repair Log) after landing gear maintenance.
  • Shock Strut Function: Supports aircraft weight and absorbs landing forces.
  • Oleo Strut: A common type of landing gear strut in modern aircraft.
  • Brake System Failure: Can lead to runway overrun and loss of control.
  • Liquid Oxygen (LOX) vs OBOGS: LOX has a limited supply, OBOGS generate oxygen continuously.
  • Smoke Detector Operation: Detect smoke through changes in air particle properties.
  • Windshield Defogger Power: Electrical power is the typical source.
  • CO2 Cartridges in Life Rafts: Inflate life rafts rapidly.
  • Refueling Shut-off Valve: Prevents overfilling the fuel tank during refueling.

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Description

Test your knowledge on aircraft systems and the principles of aerodynamics. This quiz covers essential topics like lift production, angle of attack, stability, and various aircraft maneuvers. Understand the mechanics that ensure safe flight and the key systems that support aircraft operations.

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