Aviation Systems and Aerodynamics Quiz

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Questions and Answers

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

Lift increases until the critical angle of attack (correct)

Lift remains constant

Lift is unaffected by angle of attack

Lift decreases significantly

What is the primary function of flaps on an aircraft?

Increase lift in low airspeed conditions (correct)

Enhance fuel efficiency

Stabilize the aircraft in turbulence

Decrease drag during cruise

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

Pitch stability

Longitudinal stability

Directional stability

Lateral stability (correct)

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

Higher camber results in higher lift Signup and view all the answers

What does longitudinal instability in an aircraft indicate?

Uncontrollable pitching of the aircraft Signup and view all the answers

What maneuver involves rotating an aircraft about its lateral axis?

Pitching Signup and view all the answers

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

Air cycle machine Signup and view all the answers

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

Provide supplemental oxygen to passengers and crew Signup and view all the answers

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

Prevent overfilling of the fuel tank Signup and view all the answers

Which advantage is NOT provided by pressurized fuel feed systems?

Reduce fuel consumption Signup and view all the answers

What does the fuel level indicator display during flight?

Remaining fuel in the tanks Signup and view all the answers

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

To send out a distress beacon for rescuers to locate the aircraft in distress Signup and view all the answers

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

Nickel superalloy Signup and view all the answers

What is the advantage of using bimetallic fire detectors in aircraft?

They are entirely mechanical and not susceptible to power failures Signup and view all the answers

What is the main function of the oil cooler in an aircraft engine lubrication system?

Cool down the hot lubricating oil Signup and view all the answers

What is the primary advantage of titanium in aircraft construction?

It has a high strength to weight ratio and high thermal resistance Signup and view all the answers

Why is maintaining the correct weight and balance record important for an aircraft?

To ensure the aircraft’s center of gravity does not move too far from its center of lift Signup and view all the answers

During which stroke does the crankshaft reach its top dead center (TDC) position in a 4-stroke cycle?

Compression stroke Signup and view all the answers

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

It ensures that all components are installed symmetrically for stability Signup and view all the answers

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

Prevent overpressure from damaging components Signup and view all the answers

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

Titanium alloy Signup and view all the answers

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

To power utility systems such as thrust reversers and slats Signup and view all the answers

What does the term 'all up weight' refer to in aviation?

The total weight of an aircraft at the start of a flight Signup and view all the answers

How can water contamination in fuel be visually detected?

By observing a layer of water in the fuel sample Signup and view all the answers

What is the primary purpose of hydraulic systems in aircraft?

To power flight controls, landing gears, and brakes Signup and view all the answers

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

Check all components in the hydraulic system for leaks and top-up if none found Signup and view all the answers

What type of tire construction offers improved puncture resistance?

Tubeless tire Signup and view all the answers

What documentation is typically updated after completing landing gear maintenance procedures?

SAF 1400-6 (Change of Serviceability and Repair Log) Signup and view all the answers

What is the function of the shock strut in a landing gear system?

To support the aircraft's weight and absorb landing forces Signup and view all the answers

What does 'all up weight' refer to in aviation?

The weight of an aircraft including all cargo, passengers, and fuel Signup and view all the answers

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

Oleo strut Signup and view all the answers

What could be a potential consequence of a brake system failure during landing?

Runway overrun and loss of control Signup and view all the answers

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

More puncture resistant Signup and view all the answers

How does the landing gear shock strut cushion the impact of landing?

By means of compressed air and hydraulic fluid Signup and view all the answers

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

Check for leaks and top-up if none are found Signup and view all the answers

What is the primary difference between liquid oxygen (LOX) and on-board oxygen generation systems (OBOGS)?

LOX has a limited supply, OBOGS generates oxygen continuously Signup and view all the answers

How do smoke detectors in aircraft cabins typically detect smoke?

Through changes in air particles Signup and view all the answers

What is the source of power for most aircraft windshield defogger systems?

Electrical power Signup and view all the answers

What is the function of CO2 cartridges in aircraft life rafts?

For rapid inflation of the life raft Signup and view all the answers

What is the role of the refueling shut-off valve in the refueling process?

To prevent overfilling of the fuel tank Signup and view all the answers

Study Notes

Aerodynamics

Increasing the angle of attack increases lift production until a critical angle where the wing stalls.
Flaps on aircraft increase lift in low airspeed conditions.
Lateral stability is the tendency of an aircraft to return to level flight after a roll disturbance.

Aircraft Components & Systems

Higher camber on an aircraft wing results in a higher lift production.
Longitudinal instability results in uncontrollable pitching of the aircraft.
Pitching involves rotating the aircraft about its lateral axis.
The air cycle machine conditions outside air, ensuring proper flow rate, and providing cooling.
Emergency oxygen supplies provide supplemental oxygen to passengers and crew during aircraft survival.
Hypoxia can be mitigated by having a supplemental oxygen supply or cabin pressurization during high-altitude flights.
Increasing cabin temperature from 20°C to 25°C would require the Environmental Control System (ECS) to increase cooling airflow.
Engine inlets, nacelles, and wing leading edges are typically protected by bleed air anti-ice systems.
Anti-icing system malfunction can lead to icing, reduced efficiency, and loss of lift on wings.
An Emergency Locator Transmitter (ELT) sends out a distress beacon.
Bimetallic fire detectors are entirely mechanical, triggered by heat, and not susceptible to random failures or power failures.
Titanium is used in aircraft construction due to its high strength-to-weight ratio and high thermal resistance.
A weight and balance record ensures the aircraft's center of gravity (CG) remains within the acceptable limits.
Rigging affects the aircraft's center of gravity by ensuring symmetrical component placement on the center line for stability.
Yawing is a change in direction caused by the rudder control surface.
"All Up Weight" is the total weight of an aircraft at the beginning of a flight.

Aircraft Fuel Systems

Gravity draining typically involves using a drain valve at the lowest point in the fuel tank to allow the fuel to flow naturally.
Fuel quantity indicators inform the pilot of the remaining fuel level.
Water contamination in fuel is visually detectable by looking for a water layer in the sample.

Aircraft Hydraulic Systems

Hydraulic pressure relief valves prevent overpressure damage within the hydraulic system.
Aircraft utility hydraulic systems provide power to various systems, e.g., thrust reversers, flaps, and slats.

Aircraft Braking System

Disc brakes slow the aircraft's movement and are used on the wheels of the aircraft on the ground.
Hydraulic systems provide power for flight controls, landing gear, and brakes.
Maintaining hydraulic fluid levels ensures efficient maintenance.
Flight controls feel independent with rods and pulleys, full feel with boosters, reduced feel when hydraulically powered, and no feel in the absence of an artificial feedback system.

Aircraft Landing Gear System

Dual hub construction is commonly used in high-performance aircraft for its strength and lightweight.
Brake system failure can result in runway overrun and possible loss of control during landing operations.
SAF 1400-6 (Change of Serviceability and Repair Log) is typically updated after landing gear maintenance.

Aircraft Servicing Forms

Aircraft servicing form 1400 contains details of the aircraft, servicing, and rectification.

Additional Questions

Ice accumulation on aircraft instruments causes inaccurate readings, including Airspeed.
Smoke detectors detect smoke in the cabin by sensing changes in air particles.
Fire detection systems typically use temperature sensors to detect fires.
Aircraft windshield defogger systems are powered primarily by electrical power. -Oleo struts are common landing gear struts in modern aircraft.

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Description

Test your knowledge on aviation systems and aerodynamics with this quiz. It covers various aspects including lift production, aircraft stability, and emergency systems. Perfect for students and aviation enthusiasts alike!