AVMT 2070- Aircraft Landing Gear
True or False: Most aircraft with a tricycle landing gear use differential braking for steering during ground operations.
False, p. 13-4
True or False: When checking tire pressure wait atleast 30 minutes after a typical landing to ensure the tire has cooled to ambient temperature.
False, When checking tire pressure wait atleast 3 hours after a typical landing p. 13-81
True or False: the most common display for the landing gear being up and locked is an illuminated green light.
False, a lit green light is the display for landing gear being down and locked
True or False: autobrake systems on large aircraft do not use tge anti-skid system to control wheel skid.
False, autobrake systems on large aircraft do use tge anti-skid system to control wheel skid. p. 13-66
True or False: small pieces of rock or debris can be removed with a probing tool or screwdriver while the tire is on the aircraft and inflated.
False, debris should only be removed after tire has been deflated p. 13-82
True or False: Wheels for modern aircraft use a one piece design which provides superior strength and ease of tire installation.
False, modern aircraft use two piece wheels
True or False: sequence valves are often operated mechanically and priority valves control gear component timing via hydraulic volume adjustment.
False, priority valves control gear component timing via hydraulic volume adjustment. p. 13-22
True or False: dual disc brakes are used on large transport aircraft that use hydraulic systems to operate the brake systems.
False, segmented rotor disc brakes are used on large transport category aircraft. p. 13-46
True or False: Landing gear shock struts are filled with air and synthetic turbine engine oil.
False, shock struts are filled with air or nitrogen. p. 13-8
True or False: During taxi operations the air in the tires and the hydraulic fluid in the shock strut combine to smooth out bumps.
False, the air in the tires and the struts combine to smooth out bumps. p. 13-12
True or False: the two pieces of a two piece aircraft wheel are identical and could be used on both the inside and outside of the wheel.
False, the two halve of aircraft tires are not identical p. 13-36
True or False: Proximity sensors are used for gear position safety switched on many smaller single engine aircraft.
False, theyre used on high-performance aircraft. p. 13-23
True or False: type III tires are common general aviation tire, Type V tires are high performance tires found on jet aircraft.
False,Type VII tires are high performance tires found on jet aircraft. P. 13-75
True or False: to check the fluid level of most shock struts, the strut needs to be deflated and fully compressed.
True p. 13-12
True or False: Most smaller aircraft use a power pack gear retraction system while large aircraft use a hydraulic landing gear retraction system.
True p. 13-18/13-20
True or False: Some aircraft use a mechanical emergency release system thay unlocks the uplocks and the gear will free gall, while others use a pneumatic power system to lower the gear when the main system fails.
True p. 13-22
True or False: aircraft equipped with a hydraulic nose wheel steering system utilize the steering cylinders as shimmy dampers.
True p. 13-33
True or False: aircraft technicians shouls be careful when they approach or remove a tire. the high internal pressure of the tire can create a catastrophic failure that could be lethal to the technician.
True p. 13-37
True or False: in a fixed disk brake system (cleveland) the brake caliper and linings adjust their position in relation to the disc.
True p. 13-45
True or False: when more than two wheels are attached to a landing gear strut, the attaching mechanism is known as a bogie.
True p. 13-5
True or False: in general small light aircraft use independent brake systems. a master cylinder provides the hydraulic pressure.
True p. 13-52
True or False: the brake accumulator is an emergency source of power for the brake system.
True p. 13-57
True or False: in order to bleed the power brake system of a large transport category aircraft the hydraulic system needs to be pressurized.
True p. 13-70
True or False: Traditional aircraft tires are bias ply tires while modern large aircraft utilize radial tires.
True p. 13-77
True or False: under inflation could be evident from excessive wear on the outside of the tire threads.
True p. 13-81
how long should you wait after a flight before checking tire pressure? a.) at least 3 hours b.) at least 2 hours c.) at least 30 minutes
a.) at least 3 hours
when an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by: a.) compression of the air charge b.) the fluid being forced through a metered opening c.) compression of the fluid
a.) compression of the air charge
a landing gear position and warning system will provide a warning in the cockpit when the throttle is a.) retarded and gear is not down and locked b.) advanced and gear is down and locked c.) retarded and gear is down and locked
a.) retarded and gear is not down and locked
the pressure source for power brakes is: a.) the main hydrauluc system b.) the power brake resevoir c.) a master cylinder
a.) the main hydrauluc system
a high speed aircraft tire with a sound cord body and bead may be recapped: a.)a maximum of 3 times b.) only by the tire manufacturer c.) an indefinite number of times
c.) an indefinite number of times
nose gear centering cams are used in many retractable landing gear systems. the primary purpose of the centering device is to: a.) align the nosewheel prior to touchdown b.) engage the nosewheel steering c.) center the nosewheel before it enters the wheel well
c.) center the nosewheel before it enters the wheel well
Parasite drag caused by landing gear can be reduced by the addition of 1.)_____ or 2.)____
1.) Fairings 2.) Wheel pants p. 13-5
The proper functioning of a landing gear system and components can be checked by performing a 1.)_______________. This is also known as 2.)_____ the gear.
1.) Landing gear system retraction test. 2.) swinging p. 13-29
Nose gear shock struts have a 1.)____ to keep the gear aligned when the aircraft takes off and the shock strut is fully extended.
1.) Locating cam p. 13-10
Nose wheel vibration is controlled through the use of a 1.)_____.
1.) Shimmy damper p. 13-32
Most single engine aircraft use a non shock absorbing landing gear made from 1.)____, 2.) ____ , or 3.) ____.
1.) Steel 2.) composite 3.) aluminium p. 13-6
Name the three basic arrangements of landing gear used in aircraft: 1.)_____ 2.)______ 3.)______
1.) Tail wheel 2.) Tandem 3.) Tricycle p. 13-2
the inner wheel half of a wheel ised on a high performance aircraft is likely to have one or more 1.)_____.
1.) Thermal plugs p. 13-36
To keep the shock strut and wheels aligned, most shock struts are equipped with 1.)____, and 2.)____.
1.) Torque links 2.)Torque arms p. 13-6
The alignment of a main wheel in the vertical plain is called 1.)_____.
1.) camber p. 13-16
the 1.)____ is the latest iteration of the multiple disc brake.
1.) carbon-disk p. 13-51
operation on a grooved runway can cause an aircraft tire tread develop shallow 1.)____ shaped cuts.
1.) cheveron p. 13-84
The 1.)____ lowers the landing gear if the main power system fails.
1.) emergency extension p. 13-22
Brinelling is cause by 1.)_____. it appears as 2.)_____ in the bearing cup raceway.
1.) excessive impact 2.)indentations p. 13-39
brake systems with master cylinders may be bled by 1.)____ or 2.)____ bleesing methods.
1.) gravity 2.) pressure p. 13-83
the 1.)____ transfers the motions of the pistons to the stack of 2.)____ and 3.)____ to slow the rotation of the wheel.
1.) hydraulic pressure 2.) stators 3.) rotors p. 13-46
the three brake actuating systems used are 1.)____, 2.)____ and 3.)_____.
1.) independent 2.) booster 3.) power break p. 13-52
overheating of the wheel bearings could be caused by a 1.)_____ and result in a 2.)____ tint to the metal surface.
1.) lack of lube 2.) bluish p. 13-38
power brake systems use the 1.)____ as the source of power to apply the brakes.
1.) main hydraulic systems p. 13-52
The electric/hydraulic landing gear system found in many Cessna and Piper aircraft is called a bit 1.)____.
1.) power pack p. 13-18
the anti-skid system not only detects wheel 1.)____, it also detects when wheel skid is 2.)____.
1.) skid 2.) imminent p. 13-61
maximum braking efficiency exists when the wheels are decelerating at a maximum rate but are not 1.)_____.
1.) skidding p. 13-61
A flat spot on a tire is the result of the tire 1.)____ on the runway surface.
1.) skidding p. 13-83
the auto brake system is used to stop the wheels automatically after 1.)____ this prevents the wheels from rotating when retracted in the wheel wells.
1.) takeoff p. 13-56
pushing the 1.)____ of the right rudder pedal activates the brake on the 2.)____ main wheel.
1.) top 2.) right p. 13-43
All aircraft axle nuts must be installed and 1.)_____ in accordance with the airframe manufacturer's maintenance procedures.
1.) torqued p. 13-37
to prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact: a.) various types of valves or orifices are used which restrict the reverse fluid flow b.) the metering pin gradually reduces the size of the orifice as the shock strut extends c.) the air is forced through a restricted orifice in the reverse direction
a.) various types of valves or orifices are used which restrict the reverse fluid flow
why do tire and wheel manufacturers often recomemd that the tires on split rim wheels be deflated before removing the wheel from the axle? a.) to relieve the strain on the wheel retaining nut and axle threads b.) as a safety precaution in case the bolts that hold the wheel halves together have been damaged or weakened c.) to remove the static load imposed upon the wheel bearings by the inflated tire
b.) as a safety precaution in case the bolts that hold the wheel halves together have been damaged or weakened
how can it be determined that all air has been purged from a master cylinder brake system? a.) by operating a hydraulic unit and watching the system pressure gauge for smooth, full scale deflection b.) by noting whether the brake is firm or spongy c.) by noting the amount of fluid return to the master cylinder upon brake release
b.) by noting whether the brake is firm or spongy
the primary purpose for balancing aircraft wheel assemblies is to: a.) prevent heavy spots and reduce vibration b.) distribute the aircraft weight properly c.) reduce excessive wear and turbulence
b.) distribute the aircraft weight properly
which statement is true with respect to an aircraft equipped with hydraulically operated multiple disk type brake assembies? a.) there are no minimum or maximum disk clearance checks required due to use of self compensating cylinder assemblies b.) do not set parking brake when brakes are hot c.) no parking brake provisions are possible for this type of brake assembly
b.) do not set parking brake when brakes are hot
on all aircraft equipped with retractable landing gear, some means must be provided to: a.) retract and extend the landing gear if the normal operating mechanism fails b.) extend the landing gear if the normal operating mechanism fails c.) prevent the throttle from being reduced below a safe power setting while the landing gear is retracted.
b.) extend the landing gear if the normal operating mechanism fails
the metering pins in oleo shock struts serve to: a.) lock the struts in the DOWN position b.) retard the flow of oil as the struts are compressed c.) meter the proper amount of air in the struts
b.) retard the flow of oil as the struts are compressed
the best safeguards against heat buildup in aircraft tires are: a.) proper tire inflation, minimum braking, and ground rolls into the wing b.) short ground rolls, slow taxi speeds, minimum braking, and proper tire inflation c.) minimum braking, proper tire inflation, and long ground rolls
b.) short ground rolls, slow taxi speeds, minimum braking, and proper tire inflation
in brake service work, the term 'bleeding brakes' is the process of: a.) withdrawing air only from the system b.) withdrawing fluid from the system for the purpose of removing air that has entered the system c.) replacing small amounts of fluid in reservoir
b.) withdrawing fluid from the system for the purpose of removing air that has entered the system
What is the function of a cam incorporated in a nose gear shock strut? a.) provided an internal shimmy damper b.)straightens the nosewheel c.) provides steering of aircraft during ground operation
b.)straightens the nosewheel
the purpose of a sequence valve in a hydraulic retracteable landing gear system is to: a.) prevent heavy landing gear from falling too rapidly upon extension b.) provide a means of disconnecting the normal source of hydraulic power and connecting the emergency source of power c.) ensure operation of the landing gear and gear doors in the proper order
c.) ensure operation of the landing gear and gear doors in the proper order
What should be checked when a shock strut bottoms during a landing? a.) air pressure b.) packing seals for corrected installation c.) fluid level
c.) fluid level
instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found: a.) on the airplane data plate b.) in the aircraft operation limitations c.) in the aircraft manufacturer's service manual
c.) in the aircraft manufacturer's service manual
what is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut? a.)limit compression stroke b.) hold the strut in place c.) maintain correct wheel alignment
c.) maintain correct wheel alignment
after performing maintenance on an aircraft's landing gear system which may have affected the system's operation, it is usually necessary to: a.) conduct a flight test b.) re-inspect the area after the first flight c.) make an operational check with the aircraft on jacks
c.) make an operational check with the aircraft on jacks
excessive wear in the center of the tread of an aircraft tire is an indication of: a.) incorrect camber b.) excessive toe out c.) over inflation
c.) over inflation
on most aircraft, the oil level of an air and oil shock strut is checked by: a.) removing the oil filler plug and inserting a gauge b.) measuring the length of the strut extension with a certain air pressure in the strut c.) releasing the air and seeing that the oil is to the level of the filler plug
c.) releasing the air and seeing that the oil is to the level of the filler plug
an electric motor used to raise and lower a landing gear wpuld most likely be a: a.) shunt field series wound motor b.) split field shunt wound motor c.) split field series wound motor
c.) split field series wound motor
aircraft brakes requiring a large volume of fluid to operate the brakes generally: a.) use independent master cylinder system b.) do not use brake system accumulators c.) use power brake control valves
c.) use power brake control valves
Overinflated aircraft tires may cause damage to the: a.) brake linings b.) wheel hub c.) wheel flange
c.) wheel flange
exposure to and/or storage near which of the following is considered harmful to aircraft tires? 1.) low humidity. 2.) fuel. 3.) oil. 4.)ozone 5.) helium. 6.) electrical equipment 7.) hydrauluc fluid 8.) solvents a.)2,3,4,5,6,7,8 b.)1,2,3,5,7,8 c.)2,3,4,6,7,8
c.)2,3,4,6,7,8
the purpose of a relief valve in a brake system is to: a.)reduce pressure fir brake application b.)prevent the tire from skidding c.)compensate for thermal expansion
c.)compensate for thermal expansion
the fusible plugs installed in some aircraft wheels will: a.)indicate tire tread seperation b.)prevent over inflation c.)melt at a specified elevated temperature
c.)melt at a specified elevated temperature
debooster cylinders are used in brake systems primarily to: a.)reduce brake pressure and maintain static pressure b.) relieve excessive fluid and ensure a positive release c.)reduce the pressure to the brake and increase the volume of fluid flow
c.)reduce the pressure to the brake and increase the volume of fluid flow
