Aircraft Landing Gear Systems Practice Test

These questions are part of the practice quiz. Start practicing

• How are gear-linked position sensors used to indicate down-and-locked status?
• The ___ is the most popular tread pattern found on aircraft today.
• What is the purpose of a weight-on-wheels (WOW) sensor?
• Which action provides physical support to the landing gear during maintenance to prevent collapse or rotation?
• In a hydraulic landing gear system, what is the purpose of crossfeed?
• What is the role of limit switches in a gear retraction/extension system?
• Which action directly supports the aircraft to prevent movement during maintenance?
• Which area of a wheel is most critical to tire bead retention?
• What is the role of an anti-skid braking system (ASBS) in relation to landing gear?
• Dye penetrant inspection ______ a good method to locate cracks in the bead seat area of an aircraft wheel.
• How is a successful 'down and locked' status typically verified in the cockpit?
• ______ brake action is nearly always an indication of air in the brake hydraulics system.
• The medium that cushions the oleo strut during taxi operations is what?
• In many cases, the steering actuators serve as the ______ because they are constantly charged with hydraulic fluid under pressure.
• Tubeless tires are identified by the word ___ on their sidewall.
• What could cause an anti-skid sensor failure and how would it affect braking?
• Which color light is commonly used to indicate gear down?
• Which safety measure is essential for personal protection when performing landing gear maintenance?
• Water stains on a wheel bearing indicate which type of corrosion?
• Why is a preflight gear inspection important?
• Why are redundant gear actuators used on large airplanes?
• During landing, the gear must be in which condition?
• Which energy form do shock absorbers typically dissipate?
• Which items are considered non-absorbing gear?
• The procedure used to remove air from the brake system is known as
• Before working on landing gear, which procedure isolates energy sources and prevents unexpected re-energization?
• What ground action verifies proper sealing of gear doors after maintenance?
• Oleo strut inflation is checked by measuring the length of the exposed what?
• If ANY fusible plugs show signs of softening, they must all be replaced.
• The inboard wheel half is the half of a ______ wheel that houses the brake.
• What is the role of a gear door interlock?
• Skydrol is a common example of which type of hydraulic fluid?
• How would you verify the emergency extension handle is functional?
• How might you diagnose a slow-acting gear actuator in flight?
• What is a shimmy damper and where is it used?
• Which of the following is NOT typically considered a major component of a tricycle landing gear?
• _______ brakes are used in the wheels of large jet-transport aircraft.
• During a preflight check, which outcome verifies that the landing gear will function properly in flight?
• The hydraulic system may use either a phosphate-ester-base synthetic fluid such as Skydrol, or mineral-base MIL-H-5606 fluid. Which two factors must be noted and followed?
• To safely ensure complete tire deflation, which component is first screwed onto the valve?
• Which storage orientation is recommended for tires whenever possible?
• What is the most important part of a tire?
• Which device prevents gear retraction when the aircraft is on the ground?
• How can you recognize an uncommanded gear extension in flight?
• What is the role of valve logic in a multi-actuator gear system?
• The Cleveland brake for general-aviation aircraft uses which component bolted to the inside wheel half?
• What is the primary function of the oleo strut in airplane landing gear?
• Which procedure ensures energy isolation of hydraulic systems during landing gear maintenance?
• Anytime a brake shows signs of ______, it must be removed from the aircraft, inspected, and rebuilt.
• Hydroplanning is defined as the tire losing contact with the surface due to standing water. Which statement best describes this condition?
• What troubleshooting steps are used for slow gear extension?
• How would you diagnose a gear that seems stuck due to door misalignment?
• Where are fusible plugs installed on the wheel?
• Why is it generally recommended to avoid retracting gear at high speed?
• Which condition is most likely to result in tire damage or failure?
• Which protective equipment must be worn during landing gear maintenance to protect personnel?
• Why is hydraulic redundancy critical for landing gear operations?
• How is hydraulic pressure managed across multiple actuators to ensure reliable gear operation?
• If a brake system is inadvertently serviced with the wrong type of hydraulic fluid what must be accomplished?
• Which gear arrangement is considered conventional?
• What is a kneeling gear feature and where is it used?
• If the tops of the wheels are closer together than the bottoms, the landing gear has a ______ camber.
• In case of total failure of the hydraulic system, most large aircraft brake systems can be operated using a ______ emergency system.
• What does the green 'down and locked' indication signify to the flight crew?
• Water stains on a wheel bearing indicate which type of corrosion?
• _______ is the controlled movement of the airplane under its own power, while in the ground.
• What is a common on-ground test for gear doors?
• Which of the following is NOT listed as a method emergency gear extension systems may use?
• If the front sides of the wheels are closer together than the rear sides, the landing gear is ______.
• Is there a limit on the number of times an aircraft tire can be retreaded?
• Most small general-aviation aircraft are equipped with_______ brakes.
• What is the purpose of an emergency extension procedure?
• Type ___ extra-high pressure tires are the standard for jet aircraft.
• What is the typical behavior of the nose wheel steering after a steering input is released?
• _______ occurs when the aircraft's tires lose contact with the taxiway or runway surface, generally because of standing water on the surface.
• Which condition contributes to spongy braking actions due to trapped air in the system?
• Define the term 'downlock' in landing gear systems.
• The ___ is the wearing surface on the outer circumference of the tire.
• Power brakes are operated using pressure from the ______ hydraulic system.
• How is nose wheel steering typically actuated and controlled?
• An oleo strut absorbs the landing impact shock with what?
• If the gear is not down, a ______ horn will sound until the throttles are opened or the gear is lowered.
• What is a typical nose gear shimmy damper issue?
• The pressure pot must be filled with the proper type of hydraulic fluid.
• Which area is described as the most critical part of a wheel?
• What term describes braking that prevents a skid by maintaining just enough brake pressure?
• How does the oleo strut absorb touchdown energy?
• The operation performed to remove air from the brake system is known as ______ the brakes.
• Which items are commonly inspected during routine landing gear door maintenance?
• Fluid from the wheel unit is vented to the atmosphere through which compensator component?
• Which statement describes tubeless tires?
• An oleo strut absorbs the taxi shocks with which medium?
• What visual cue in the cockpit confirms the landing gear is down and locked?
• Which system provides a warning to pilots if the landing gear is not down?
• During flight, and during gear extension, what is the primary purpose of landing gear doors?
• Which component is the wearing surface on the outer circumference of the tire?
• The most widely used shock absorber for aircraft is the air-oil shock absorber, commonly known as what?
• What is the consequence of a defective wheel speed sensor on braking control?
• Type ___ tires are used for high performance jet aircraft with their extremely high takeoff speeds.
• The tailwheel type landing gear arrangement is also known as what?
• All retractable landing gear systems must have some means of ______ the gear if the primary method fails.
• Which toe setting describes the configuration where the front wheel edges are closer than the rear?
• How are main gear actuators synchronized to ensure equal extension?
• If the front sides of the wheels are closer together than the rear sides, the landing gear is ______.
• What term describes the condition when the wheel tops are closer together than the bottoms?
• What indicates a failure of the gear-down sensing system?
• What is the role of interlocks and limit switches in gear doors operation?
• What role do tires play in braking and heat dissipation?
• The wheel fairings used to enclose the wheels are called what?
• Tires that have been operated with ___ inflation pressure will have their tread worn away on the shoulders more than in the center.
• A ______ ______ valve is designed to prevent a complete loss of hydraulic system fluid if a brake line fails or leaks.
• In a dual-hydraulic landing gear system, what happens if one hydraulic path becomes unavailable?
• What could indicate a gear that cannot extend or lock in flight?
• What is the purpose of a squat switch in a landing gear retraction system?
• Shock absorbing gear converts motion into energy, usually in the form of heat.
• What is a common indication of a gear extension fault?
• If a jet aircraft uses Type 7 tires, what is the numerical designation?
• What does the yellow mark on an aircraft tube indicate?
• What is the function of a relief valve in a hydraulic gear circuit?
• Which condition contributes to spongy braking actions due to deterioration of hoses?
• There_______ a limit on the number of times an aircraft tire can be retreaded.
• Inflation of an oleo strut is checked by measuring the length of the exposed what?
• A shimmy damper is used to reduce the back and forth oscillations of the nose wheel at certain speeds.
• A ______ system is used to inform the pilots if the gear is not down during a landing attempt.
• Gear warning systems are designed to warn the pilot that the gear is not down and locked when the aircraft is in the ______ configuration.
• What term describes the condition when the front sides of the wheels are closer together than the rear sides?
• What role does valve timing play in coordinating multiple main gear actuators?
• In tailwheel configurations, instability on the ground is primarily due to the relationship between which two elements?
• During landing gear maintenance, which action should be performed first to ensure safety?
• Which device prevents gear retraction on the ground?
• A ______ ______ is used to reduce the back and forth oscillations of the nose wheel at certain speeds.
• Which component on a landing gear serves the damping function due to constant hydraulic pressure?
• Which procedure provides a formal, verifiable means of controlling hazardous energy during maintenance on landing gear?
• What procedure provides a documented means of ensuring equipment cannot start up during maintenance?
• The greatest heat will be generated in a tire that is operated ________.
• What is the role of a preflight weight-on-wheels check?
• If any fusible plugs show signs of softening, they must all be replaced.
• The streamlined fairings used to enclose the wheels are referred to as what?
• Which components are involved in a typical gear retraction/extension system?
• What is the function of wheel speed sensors in the landing gear/braking system?
• All landing gear bolts must have the ______ to prevent wear and damage.
• The fluid in an oleo strut that provides the absorbing effect during landing is what?
• Why is proper tire inflation critical for landing gear performance?
• In the event of hydraulic failure, brakes can be operated using which emergency system?
• Retractable gear aircraft generally use a light to indicate that the gear is down and locked. What color is this light?
• How do hydraulic systems provide both primary and backup power to gear actuators?
• Why must gear retraction be limited by a torque or speed limit?
• During takeoff, the tailwheel is typically oriented in-line with the fuselage.
• Which brake is typically used on most small general-aviation aircraft?
• What impact can ice buildup on hinges have on landing gear movement?
• Which safety measure ensures that energy cannot be accidentally released from hydraulic systems during maintenance?
• When drying bearings with low-pressure dry compressed air, DO NOT ______ the bearings as you dry them.
• Which system uses the WOW sensor to enable ground spoilers and braking logic?
• Which inspections should be used to detect cracks on the bead seat area?
• Which diagnostic steps are appropriate when a door misalignment is suspected?
• Tires should be stored_______ whenever possible.
• Describe a typical gear extension sequence in terms of door and gear movement.
• If a brake fails to completely release after the pressure is removed, it is said to be ______.
• Which statement best describes the relationship between tire wear and braking performance?
• In landing gear operation, how does ground mode differ from flight mode?
• Screwdrivers or tire tools should not be used to pry a tire bead away from the rim.
• What would you check if a gear actuator appears slow to move during flight?
• Tailwheel aircraft are highly susceptible to an abrupt, uncontrolled change in direction on the ground called what?
• All retractable landing gear systems must have some means of ______ the gear if the primary method fails.
• Which inspection method should be used to detect cracks on the bead seat area?
• A gear warning horn will sound if the throttles are ______ and ______ of the landing gear are in the up position.
• The hydraulic pressure to the brake system is reduced using a ______ system.
• Dye penetrant inspection is not a good method to locate cracks in the bead seat area.
• The wheel is locked in-line with fuselage for takeoff and unlocked for landing allowing it to swivel ______ for ______.
• In a maintenance scenario, what is the purpose of testing the emergency extension path?
• MIL-H-5606 refers to which type of hydraulic fluid commonly used in aircraft, sometimes called 'red oil'?
• Which combination lists three major components typically found in a tricycle landing gear arrangement?
• Dye penetrant inspection is a good method to locate cracks in the bead seat area of an aircraft wheel.
• Which inspection method should be used to detect cracks on the bead seat area?
• Which safety measure helps prevent the aircraft from moving during landing gear maintenance?
• A squat switch may be installed in a landing gear retraction system to prevent the landing gear from being raised while the aircraft is on the ground.
• If a jet aircraft uses Type 8 tires, what is the numerical designation?
• Which step should be performed to ensure hydraulic leaks do not create hazards during maintenance?
• What signals the cockpit that the gear is down and locked?
• Differentiate gravity extension from emergency hydraulic extension.
• How does gravity extension operate in practice for gear?
• What does the red dot on an aircraft tire indicate?
• The ___ of the tire is made up of layers of plies of rubber-coated nylon-cord fabric.
• The ______ ______ arrangement is seldom used on civilian aircraft other than gliders.
• What is a bogie in main landing gear?
• What is the consequence of not maintaining proper torque on landing gear bolts?
• Which mode restriction helps prevent accidental gear retraction during flight?
• The tailwheel landing gear arrangement is also known as which of the following?
• Before loosening the wheel half retaining bolts, be sure the tire is completely ______.
• Aircraft bearings should not be cleaned with steam.
• In the brake system, which component keeps the compensator port open when the pedal is not depressed?
• The inboard wheel half is the half of a ______ wheel that houses the brake.
• Which action is taken to physically stabilize the aircraft during landing gear service to maintain a safe work plane?
• Which action helps maintain stability of the aircraft when extending or retracting landing gear for inspection?
• Tires used on the nose wheels of these aircraft have ___, or deflectors molded into the upper sidewall to deflect the water or slush away from the engine intakes.
• The code 'green, locked' indicates which gear status?
• If the tops of the wheels are closer together than the bottoms, the landing gear has a ______ camber.
• The red dot on an aircraft tire generally indicates the_______ spot.
• The spring in a tailwheel-type landing gear provides steering ______.
• Which device is installed in the inboard half of the main wheels to release air from a tire in case of extreme overheating?
• The pressure should be checked ___ and before each flight.
• What is the purpose of a landing gear warning system?
• How do gear doors ensure safe movement during extension and retraction?
• Even if only one of the plugs indicates any deformation, all of the plugs must be ______.
• Which component reduces nose wheel shimmy at certain speeds?
• Which measure directly reduces the risk of aircraft movement during landing gear service?
• The component described as the air-oil shock absorber is commonly known as what?
• What considerations arise when operating landing gear in icing conditions?
• What is typical about the nose wheel steering angle?
• Which feature on the nose-wheel tire deflects water or slush away from engine intakes?
• The most popular low-pressure tire found on piston-powered aircraft today is the Type ______ tire.
• What component prevents a complete loss of hydraulic system fluid if a brake line fails or leaks?
• In the wheel brake hydraulic system, which component is vented to the atmosphere?
• Which term describes the main load-bearing structure of the tire, made up of layers of rubber-coated nylon-cord fabric?
• While taxiing an airplane, if there is any doubt about clearance from an obstacle,_______ the airplane and_______.
• Which components are responsible for sequencing during gear extension and retraction?
• These centering cams center the nose wheel when the strut is extended after ______.
• Which items are typically included in common maintenance checks for landing gear doors?
• Which of the following is a typical indicator of a damaged gear door seal?
• Before loosening the wheel half retaining bolts, it is essential to confirm that the tire is completely ______.
• How do crossfeed lines support gear operation in a dual-hydraulic system?
• How would you test the wheel speed sensors during maintenance?