Landing gear final
Landing Gear Knowledge Quiz
Test your knowledge of aircraft landing gear systems with our comprehensive quiz. This quiz features 30 carefully crafted multiple-choice questions that cover a range of topics related to aircraft steering systems, tire construction, and operating principles.
Whether you're a student, a professional in the aviation field, or simply an aviation enthusiast, this quiz is designed for you! It includes:
- Questions on small and large aircraft steering mechanisms
- Information about tire construction and types
- Technical insights into hydraulic systems
Small aircraft nose wheels are commonly controlled via a ______ connection between the ______ ______ and the gear itself
Indirect, tiller wheel
Indirect, rudder pedals
Direct, tiller wheel
Direct, rudder pedals
Large aircraft utilize steering _________ that are controlled by a steering ______ and/or rudder pedals.
Actuators, tiller
Assistors, wheel
Actuators, column
Assistors, tiller
How are steering systems on large aircraft controlled and operated?
Electronically or directionally
Electronically or pneumatically
Electronically or mechanically
Electronically or hydraulically
Some types of small aircraft don't have direct steering but utilize differential _______ and ______ plus a castering nose or tail wheel.
Braking, swerving
Thrust, braking
Thrust, steering
Braking, thrust
The hydraulic actuators provide steering control by rotating the strut by means of what component?
Steering disc
Steering collar
Steering jack
Steering piston
When the strut is rotated, what translates this motion to the axle?
Upper slip ring
Lower torque link
Lower slip ring
Upper torque link
Control inputs to the steering mechanism may take the form of cables and pulleys positioning a hydraulic _______ valve or a computer controlling a hydraulic _____ valve.
Control, service
Service, control
Control, servo
Servo, control
On some large aircraft, shimmy dampening is achieved by holding a ________ pressure on the return side of the system through the ______ valve
Direct, servo
Constant, relief
Direct , relief
Constant, servo
The controlling computer receives feedback from the _____ valve and ___________ which indicate actuator positions.
Servo, transmitters
Slave, transducers
Servo, transducers
Slave, transmitters
What component is commonly used to lockout the steering system when the aircraft is under tow?
Switch
Cable
Pin
Button
Some modern fly-by-wire aircraft have inputs from _________ for steering during landing.
Reverse thrust
Engine thrust
Autopilot
Copilot
On the A340-500 aircraft, the ____ and the Servo Valve, constantly interface with the ____ and provide precise, updated info to the ECAM.
BSCU, RVDT
BSCU, FCPC
FCPC, RVDT
FCPC, BSCU
What component on the A340-500 provides hydraulic pressure to the Swivel Selector Valve if the primary supply fails?
Stand-By Valve
Stand-Up Valve
Change-Up Valve
Change-Over Valve
The RVDTs receive inputs from the steering actuators. Which component receives their information?
FCSC
BSCU
FCPC
BSCP
Primary computers for flight control receive info from autopilot as well as data from what other inputs?
Airspeed
Engine Master
WOW Switches
All the above
What parameter is being measured by the RVDTs?
NWS Compression
NWS Angle
NWS Channels
NWS Servo
Aircraft tires are designed to handle tremendous ______loads and very high __________ speeds.
Directional, impact
Rotational, impact
Impact, rotational
Impact, directional
What are the two types of tires used in the aircraft industry?
Bias, tube
Bias, tubeless
Tube, tubeless
Radial, tube
The bead, carcass, tread and sidewall are the _______ components of a tire.
Integral
Separated
Primary
Divided
What is the most important feature of the tire?
Bead
Sidewall
Tread
Carcass
All ground forces felt within the tire terminate where?
At the rim
At the bead
At the sidewall
At the fusible plug
The bead of the tire is constructed of bundles of high-strength ______-_____ wire, with _-_ of these bundles on each side of the tire.
Carbon-steel, 1-3
Carbon-steel, 3-5
Nylon-cord, 3-5
Nylon-cord, 1-3
This part of the tire is constructed of layers of rubber-coated, nylon-cord fabric.
Carcass
Bead
Sidewall
Tread
The carcass of any tire may be of what two types?
Radial, bias
Tube, bias
Tubeless, radial
Bias, tubeless
A bias tire has the cord material running at what angle relative to tread direction?
0'
180'
45'
90 '
A radial tire has the cord material running in what direction relative to the tread?
0'
45'
180'
90'
What is one of the components that helps protect the sidewall?
Bead toe
Breaker
Chafer
Bead heel
What is the smooth area of the tire that helps protect the tube!
Carcass
Lining
Tread
Chipper
What is the wearing surface on the outer circumference of the tire?
Carcass
Bead
Tread
Sidewall
What is the most popular tread pattern used on aircraft?
Chine
Rib
All weather
Plain
Which type tire would you install on the nose landing gear to prevent water & slush entering the intakes on aircraft with tail- mounted engines?
Standard with chine
All weather
Rib with chine
Rib
What component protects the carcass from cuts, bruises, moisture and ozone?
Tread
Sidewall
Chafers
Plies
As a technician, you will carry out daily, routine inspections of aircraft tires looking for proper _________ and specific _________.
Inflation, cleanliness
Deflation, condition
Inflation, condition
Deflation, cleanliness
Tire pressure is ________ and therefore should be checked daily to prevent premature ____
Critical, tears
Routine, tears
Critical, wear
Routine, wear
How long should you wait after landing, before checking tire pressure?
30 mins
1 hour
2-3 hours
24 hours
Always service the tire ______ with ___ pressure ________ only
Quickly, high, nitrogen
Slowly, low, nitrogen
Quickly, low, oxygen
Slowly, high, oxygen
What is a true indication of an improperly serviced tire?
Dirty wheels
Cuts and abrasions
Faulty gage
Wear patterns
If the tread has worn _____ or a carcass ply is _______, the tire should be ________.
Down, exposed, patched
Flush, exposed, patched
Flush, exposed, replaced
Down, exposed, replaced
When a tire is initially installed on a wheel, it should be placed in a ____ and ________.
Jack, inflated
Cage, deflated
Cage, inflated
Jack, deflated
What is a common cause of cuts on aircraft tires?
FYI
FOB
FOD
FOR
Tires require replacement if a ___ is cut halfway or a carcass ___ is exposed.
Ply, rib
Ply, rim
Rib, ply
Rim, ply
What harmful condition occurs when a tire heats up during hydroplaning?
Chunking
Peeled Rib
Chevron Cutting
Rubber Reversion
What condition occurs when the tire experiences landings on crossed-grooved runways?
Peeled Rib
Rubber Reversion
Chevron Cutting
Chunking
What would you do if you found a sidewall crack on a tire installed on any large aircraft?
Stick a screwdriver in it
Patch it
Replace it
Buff it out
What determines whether a tire can be retreaded?
Carcass condition
MM
Tread wear
AC 43
Tires should be stored __________ on a rack in a cool, dry area, away from direct ________.
Horizontally, daylight
Vertically, sunlight
Horizontally, sunlight
Vertically, daylight
What are the two primary causes for leaks in an aircraft tube?
Hole, cut
Cut, valve
Hole, rim
Cut, rim
What's the best way to store a tube?
Talcum powder and oil
Paper bag
Work bench
Original carton
Tires and tubes should be stored as far from electrical machinery as possible because they produce harmful _____.
Freon
Neon
Ozone
Peon
The ______ mark on the tube is aligned with ___ ___ on the tire when assembling the wheel unit.
Yellow, red dot
Green, valve stem
Yellow, valve stem
Green, red dot
After initial "build-up" the air pressure in a tube-type tire will drop due to stretching and trapped air. How long before you can re-service the assembly?
2-4 hours
6-12 hours
12-24 hours
2-3 weeks
How would you install a tube without a yellow mark?
Line up the red dot opposite the valve
Line up the valve with the red dot on tire
It doesn't matter
Discard it, unserviceable
What materials are used to construct aircraft floats?
Aluminum, steel & wood
Aluminum, carbon fiber & wood
Aluminum, carbon fiber & steel
Aluminum, wood, plastic
Floats installed on any aircraft require periodic maintenance because of the impending _________ on metal parts
Contours
Corrosion
Fabric
Fatigue
What type of Ski configuration uses a hydraulic system to extend & retract the Ski below the wheel?
Fixed Wheel Ski
Retractable Wheel Ski
Standard
Wheel Ski
What component is used to hold the "toe" of the ski up when landing?
Bungee cord
Check cable
Pivot cable
Shock cord
What are the two types of aircraft brakes?
Multi & Cleveland
Cleveland & Goodyear
Multi & Single
Single & Goodyear
Single disc brakes are primarily used for ___________ small aircraft.
Taxiing
Manoeuvring
Stopping
Manufacturing
What is the difference between a Cleveland & Goodyear brake assembly?
Fixed disc, floating caliper
Floating caliper, floating disc
Floating disc, floating caliper
Fixed caliper, floating disc
These components are made of metallic friction or organic material.
Pads
Heat shields
Discs
Hub
On larger aircraft, the brake uses a series of _______ to force a ________ plate against a stack of discs to apply a clamping force.
Pistons, pressure
Carbons, back
Pistons, back
Carbons, pressure
Aircraft brake discs are made of either ______ or _____.
Carbon, cobalt
Steel, carbon
Steel, glass
Glass, cobalt
How does a brake unit compensate for continuous wear?
Auto-adjusters
Anti-adjusters
Auto-park
Anti-skid
On a Cleveland brake unit, where are the pads mounted?
Linings
Caliper
Disc
Piston
How many pistons are arranged on a Cleveland brake unit?
Several
3
1 or more
5 or 6
The Goodyear brake is made of a a forged-steel ____ that is _____ to rotate with the wheel.
Clip, tanged
Disc, keyed
Disc, tanged
Clip, keyed
Anti-rattle clips use a ______ force to prevent rattle and wear between the disc and _____.
Spring, tires
Pressure, tires
Pressure, wheel
Spring, wheel
Brake linings should always be installed with the _________ opposite the ____.
Lettering, pads
Chafers, disc
Clippers, pads
Lettering, disc
What materials are brake calipers made from?
Steel or glass
Carbon or steel
Aluminum or tungsten
Aluminum or magnesium
How is hydraulic fluid sealed in the piston cavity?
Piston
Felt seal
O Ring
Caliper
On multi-disc brake units, the ________ plate is forced against a series of ________ and _________ discs.
Backing, rotating, stationary
Pressure, revolving, stationary
Pressure, rotating, stationary
Backing, revolving, stationary
How are the stationary discs placed on the torque tube to allow them to move laterally but not to rotate?
They have adjusters
They have keys
They have tangs
They have sliders
Why do we need the brake to release pressure on the stack of discs after application?
Prevent wear
Provide constant clearances
Prevent binding
All of the above
How are rotating discs keyed into the wheel?
Drive cables
Drive tangs
Drive teeth
Drive tools
Carbon discs are _______ and _______ than steel and provide better ____ and ____ dissipation characteristics.
Thinner & lighter, warp & heat
Thinner & lighter, wear & heat
Thicker & lighter, wear & heat
Thicker & lighter, warp & heat
The Electro-Mechanical Carbon brake unit uses a high speed motor to actuate the pressure and force on the stack. How does it convert this high speed to high torque?
Ball gear
Spring gear
Reduction gear
Ball screw
What type of primary brake system would be used on modern large aircraft?
Dual
Power
Emergency
Boosted
Simple small aircraft would use this type of brake system.
Power
Independent master cylinder
Boosted
Emergency
Why are master brake cylinders vented to atmosphere?
Thermal dissipation
Excess air
Thermal expansion
How is the pressure "boost" established within a Boosted brake system?
Pedal
Toggle
Piston
Spool valve
A typical Power brake system will incorporate an Emergency Brake as well as what two other subsystems?
Shuttle valve & anti-skid
Shuttle valve & check valve
Deboosting, check valve
Deboosting & anti-skid
On some large aircraft, if hydraulic pressure is lost, what can be used for Emergency Braking?
N2
N1
CO
CO2
Two primary inspections on any brake unit in-service will be ____ and _____.
Wear & tear
Chatter & rattle
Wear & leaks
Dragging & rattle
On large aircraft with multi-disc brakes wear indication can be verified by a visual of the wear indicator ___.
Tab
Pad
Pin
Nut
When a brake doesn't completely release after pressure is removed, what may happen?
Dragging
Squealing
Rubbing
Chattering
This malfunction of the brakes can be heard as they are applied and released several times a minute.
Rubbing
Chattering
Dragging
Rattling
What is the cause of spongy brakes?
Pilot
Air
Rigging
You
Anti-Skid systems were developed to ________ the rate of individual wheel ____________ to prevent skidding.
Accelerate, deregulation
Regulate, deceleration
Deregulate, acceleration
Decelerate, regulation
If the wheel decelerates to quickly that specific wheel will receive what?
Brake reduction order
Brake overheat order
Brake release order
Brake lock order
What are the three components of the Anti-Skid system?
Transducers, Valves, Servo
Sensors, Valves, PC
Sensors, Valves, Computer
Transducers, Valves, PC
A "brake release order" results in the anti-skid control valve sending hydraulic fluid back to where?
Pressure
Return
Supply
Emerg
Anti-Skid systems can be __ or __ operated.
AC, DC
ON, OFF
AC, AD
SB, AD
What component sends wheel speed info to the Control Unit?
Pod
Linings
Servo
Transducer
Anti-Skid control valves are designed so they "failsafe" to ____.
Open
Normal
Close
Bypass
At what speed is the Anti-Skid system fully active?
@ 30 mph
@ 20 mph
@ 10 mph
@ 0 mph
At what speed does the Anti-Skid system become inactive?
Below 10 mph
Below 20 mph
Below 30 mph
Below 40 mph
In the event of a rupture in the hydraulic system, what component may be inline to prevent total loss of pressure?
Frangible disc
Park brake
Metering valve
Hydraulic fuse
How does the pilot ensure the integrity of the Anti-Skid system?
System lights
System tests
System glitches
Ground or Flight modes
Where is the most logical area to begin troubleshooting an anti-skid system on small aircraft?
Servo
Control Valve
Sensor
Computer
On an anti-skid system with an inboard and outboard channel, what is a quick way to check if the Control Unit is faulty?
Swap channels
Swap leads
Swap sensors
Swap fluid
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