Block 9 Final
What are three methods of anti.icing aircraft windshields? 1. Blanket.type heating system. 2. An electric heating element in the windshield. 3. Heated air circulating system. 4. Hot water system. 5. Windshield wipers and anti.icing fluid. 6. Ribbon.type heating system
2, 3, 5.
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. Hydraulic fluid. 8. Solvents
2,3,4,6,7,8
A special bolt in a landing gear attachment requires a torque value of 440 inch.pounds. How many foot.pounds are required?
36.6
An O.ring intended for use in a hydraulic system using MIL.H.5606 (mineral base) fluid will be marked with
A blue stripe or dot
A pilot reports the right brake on an aircraft is spongy when the brake pedal is depressed in a normal manner. The probable cause is
Air in the brake hydraulic system.
Why are the tubes in deicer boots alternately inflated?
Alternate inflation of deicer boot tubes keeps disturbance of the airflow to a minimum.
What is one check for proper operation of a pitot/static tube heater after replacement?
Ammeter reading.
Extension of an oleo shock strut is measured to determine the
Amount of oil in the strut
Aside from the external leak in the line, what will cause parking brake to creep continually to. the OFF position.
An internal leak in the master cylinder.
Why do tire and wheel manufactures often recommend that the tire on split rim wheels be deflated before removing the wheel from the axle.
As a safety precaution in case the bolts that hold the wheel halves together have been damaged on weakened.
What is the purpose of a compensating port or valve in a brake master cylinder of an independent brake system?
Assists in the master cylinder piston return
What area of a landing gear wheel assembly is the most critical and requires special NDI inspections to determine its serviceability?
Bead/Bead Seat area
How do deicer boots help remove ice accumulations?
By breaking up ice formations.
How can it be determined that all air has been purged from a master cylinder brake system?
By noticing whether the brake is firm or spongy
Locked de-boosters generally:
Cannot allow full debooster piston travel without fluid from the high pressure side entering the low pressure chamber
What icing condition may occur when there is no visible moisture present?
Carburetor ice
Nose gear centering cams are used in many retractable landing gear systems. The primary purpose of the centering device is to
Center the nose wheel before it enters the wheel well.
The purpose of a relief valve in a brake system is to
Compensate for thermal expansion
What action, if any, should be taken when there is a difference of more than 5 pounds of air pressure in tires mounted as duals
Correct the discrepancy and enter in the aircraft records.
Which of the following connects vacuum to the deicer boots when the system is not in operation, to hold the boots tightly against the leading edges in flight?
Distributor valve
Which statement is true with respect to an aircraft equipped with hydraulic operated multiple disk type brake assemblies?
Do not set parking brake when brakes are hot
The purpose of a sequence valve in a hydraulic retractable landing gear system is to?
Ensure operation of the landing gear and gear doors in the proper order.
When an empty shock strut is filed with fluid, care should be taken extend and compress the strut completely at least two times to:
Ensure proper packing ring seating and removal of air bubbles
What mixture may be used as a deicing fluid to remove frost from an aircraft surface?
Ethylene glycol and isopropyl alcohol.
Which of the following indications occur during a normal operational check of a pneumatic deicer system
Fluctuating readings on the pressure gauge and relatively steady readings on the vacuum gauge.
The red dot on aircraft tire generally indicate
High weight spot
What should be used to melt the ice in a turbine engine if the compressor is immobile because of ice?
Hot air
What condition would most likely cause excessive fluctuation of the pressure gauge when the hydraulic pump is operating?
Inadequate supply of fluid
An embossed letter "H" on an air valve core stem
Indicates high-pressure type
The repair for an out-of-tolerance toe-in condition of main landing gear wheels determined not to be the result of bent or twisted components consists of
Inserting, removing , or charging the location of washers or spacers at the center pivotal pint of the scissor torque links.
If it is determined that spongy brake action is not caused by air in the brake system, what is the next most likely cause?
Internal leakage in the master cylinder
A pilot reports that the brake pedals have excessive travel. A probable cause is
Lack of fluid in the brake system
Length of the cylinder Force = 1000lbs Volume = 200 cu. inch Diameter of piston = 3 inch
Length 66 2/3 inch
What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut?
Limit compression stroke
If an aircraft shock strut ( air/ oil type) bottoms upon initial landing contact, but functions correctly during taxi, the most portable cause is:
Low fluid
What is an approved and recommended method of NDI performed on wheel half bolts?
Magnetic Particle
After performing maintenance on an aircraft's landing gear system, which may have affected the systems operation, it is usually
Make an operational check with the aircraft on jacks.
The rubber seals used in a landing gear shock strut:
May be used only with a specific type of fluid.
. A filter incorporating specially treated cellulose paper is identified as a
Micronic filter
Retracing the landing gear on an aircraft has a decrease in:
Parasitic drag
De-booster valves are used in brake systems primarily to:
Reduce the pressure and release the brakes rapidly
Debooster cylinders are used in brake systems primarily to
Reduce the pressure to the brake and increase the volume of fluid flow
A sleeve, spacer , or bumper ring is incorporated in a landing gear oleo shock strut to:
Reduce the rebound effect
When a properly operating fusible plug has allowed a tire to deflate, the tire should be
Removed from the wheel and inspected for carcass and tread changes
A stripe or mark applied to a wheel rim and extending onto the sidewall of a tube type tire is a
Slippage mark
What is the function of a cam incorporated in a nose gear shock strut
Straightens the nose wheel
if a shock strut bottoms after it has been properly serviced the
Strut should be removed, disassembled, and inspected
what would be the affect if the piston return spring broke in a brake master cylinder
The brakes would drag
To prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact,
The metering pin gradually reduces the size of the orifice as the shock strut extends
Why do most aircraft tire manufacturers recommend that the tubes in newly installed tires be first inflated, fully deflated, and then reinflated to the correct pressure?
To allow the tube to position itself correctly inside the tire.
What is the purpose of a chine on an aircraft tire:
To direct water on the runway away from the tire
Why is it important to keep the gear wheels properly aligned?
To minimize tire wire
What is the purpose of the oil separator in the pneumatic deicing system?
To protect the deicer boots from oil deterioration.
What is the purpose of bleeding brakes
To remove air from the system
Aircraft brakes requiring a large volume of fluid to operate the brakes generally
Use power brake control valves
The hydraulic packing seals used in a landing gear shock strut are
Used only with a specific type of fluid
What is the source of pressure for inflating deicer boots on reciprocating engine aircraft?
Vane.type pump.
Over-inflated aircraft tires may cause damage to the
Wheel Hub
In brake service work, the term "bleeding brakes" is the process of?
Withdrawing air only from the system.
If an airplane equipped with master cylinders and single.disk brakes has excessive brake pedal travel, but the brakes are hard and effective, the probable cause is
Worn brake linings
Lockout deboosters are primarily pressure reducing valves that
allow full debooster piston travel without fluid from the high pressure side entering the low pressure chamber.
The purpose of a sequence valve in a hydraulic retractable landing gear system is to
ensure operation of the landing gear and gear doors in the proper order
A hydraulic system referred to as a 'power pack' system will
have all hydraulic power components located in one unit.
Which of the following are found in a laminated integral electrically heated windshield system? 1. Autotransformer. 2. Heat control relay. 3. Heat control toggle switch. 4. 24V dc power supply. 5. Indicating light.
. 1, 2, 3, 5
What is the principle characteristic of a windshield pneumatic rain removal system?
. An air blast forms a barrier that prevents raindrops from striking the windshield surface
What controls the inflation sequence in a pneumatic deicer boot system?
. Distributor valve.
Why should a chemical rain repellant not be used on a dry windshield?
. It will restrict visibility.
What maintains normal windshield temperature control in an electrically heated windshield system?
. Thermistors.
Find the area Pressure = 2000psi Force = 1500 lbs. Area =
.75
Which of the following is the best means to use when removing wet snow from an aircraft?
A brush or a squeegee
If the tops of the wheel of an aircraft are close together than the bottoms, the landing gear has ...
A negative chamber
What type of valve is used in the brake actuating line to isolate the emergency brake system from the normal power brake control valve system?
A shuttle valve
Carburetor icing may be eliminated by which of the following methods
Alcohol spray and heated induction air.
What is the purpose of greased plates placed under the landing gear when performing a gear alignment check?
Allow landing gear to assume natural position of alignment
A high speed aircraft tire with a sound cord body and bead may be recapped:
An indefinite number of times
How long should you wait after a flight before checking tire pressure?
At least 2 hours ( 3 hours in hot weather)
Aircraft tire pressure should be checked
At least once a week or more often
The purpose of a relief valve in a brake system is too?
Compensate for thermal expansion
Tail wheel type aircraft are commonly known to have:
Conventional landing gear
Chines are used on some aircraft nose wheel tires to help
Deflect water away from the fuselage
Which statement is true with respect to an aircraft equipped with hydraulically operated multiple disk type brake assemblies
Do not set parking brake when brakes are hot
On all aircraft equipped with retractable landing gear, some means must be provided to:
Extend the landing gear if the normal operating mechanism fails
The greatest amount of heat will be generated by an over inflated tire T or F
F
The most popular tread pattern found on aircraft today is the all weather tread T or F
F
The ply rating of a tire indicates the number of fabric piles in the tire T or F
F
when bleeding aircraft brakes one of the indications that the air has been purged from the system is
Firm brake pedals
What should be checked when a shock strut bottoms during a landing?
Fluid level
A hydraulic system referred to as a "power pack" system will:
Have all hydraulic power components located in one uni
Where are the heat sensors located on most aircraft with electrically heated windshields?
Imbedded in the glass.
Instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found
In the aircraft manufactures service manual
. A sleeve, spacer, or bumper ring is incorporated in a landing gear oleo shock strut to
Limit the extension stroke
The fusible plugs installed in some aircraft wheels will:
Melt at a specified elevated temperature
Which of the following regulates the vacuum of the air pump to hold the deicing boots deflated when the pneumatic deicing system is off?
Suction relief valve.
Multiple-disk brakes dissipate more energy than single-disk brake systems T or F
T
The correct inflation pressure for an aircraft tire can be obtained from:
The aircraft service manual
When an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by
The fluid being forced through a metered opening
The pressure source for power brakes is
The main hydraulic system
Internal leakage in a brake master cylinder unit can cause
The pedal to slowly creep down while pedal pressure is applied
What is one effect a restricted compensator port of a master cylinder will have on a brake system?`
The restriction will cause slow release of the brakes
What wheel assembly component may be installed in a wheel half of the main landing of jet aircraft to release the air pressure from the tire in case of extreme overheating?
Thermal/Fusible plugs
What is used as a temperature.sensing element in an electrically heated windshield?
Thermistor
What method is usually employed to control the temperature of an anti.icing system using surface combustion heaters
Thermo.cycling switches.
What is the purpose of the distributor valve in a deicing system utilizing deicer boots?
To sequence the deicer boots inflations symmetrically
If the extended longitudinal axis of the main landing gear wheel assemblies intersects aft of the aircraft, the wheels can be termed as having
Toe out
Excessive water in the shoulder area of an aircraft tire is an indication of:
Under-inflation
Some aircraft are protected against airframe icing by heating the leading edges of the airfoils and intake ducts. When is this type of anti.ice system usually operated during flight?
Whenever icing conditions are first encountered or expected to occur.
If an airplane equipped with master cylinders and single disk brakes has excessive brake pedal travel, but the brakes are hard and effective, the probable cause is:
Worn brake disc causing excessive clearance between the notches on the perimeter of the disc and the splines or keys on the wheel
A fully.charged hydraulic accumulator provides
a source for additional hydraulic power when heavy demands are placed on the system.
hydraulic hose identified as MIL.H.8794 will have a yellow stripe running the length of the hose. This stripe
is used to ensure that the hose is installed without excessive twisting.
An oleo strut absorbs the landing impact load with:
oil
If an oleo strut bottoms during taxi operations, it is likely that the strut is low on
oil
The purpose of an orifice check valve is to
restrict flow in one direction and allow free flow in the other
On most aircraft, the oil level of an air and oil shock strut is checked by
releasing the air and seeing that the oil is to the level of the filler plug.
Prior to installation of a pneumatic surface.bonded type deicer boots, on the leading edge of the wing, you should
remove all paint from the area to be covered by the deicer boot.
If the front sides of the wheels of an aircraft are closer together than the rear sides, the landing gear is .......
toed-in
Excessive wear in the center of the tread of an aircraft tire is an indication of
Over-inflation
What device in a hydraulic system with a constant-delivery pump allows circulation of the fluid when no demands are on the system?
Pressure regulator
What device in a hydraulic system with a constant.delivery pump allows circulation of the fluid when no demands are on the system?
Pressure regulator
The primary purpose for balancing aircraft wheel assemblies is to:
Prevent heavy spots and reduce vibration
The removal, installation , and repair of landing gear tires by the holder of a private pilot certificate on an aircraft owned or operated is considered to be:
Preventative maintenance
The metering pins in oleo shock struts serve to?
Retard the flow of oil as the struts are compressed
A landing gear position and warning system will provide a warning in the cockpit when the throttle is
Retarded and gear is not down and locked
What may be installed in a landing gear retraction system to prevent the landing gear from being raised while the aircraft is on the ground
Safety/ squat
What is used to reduce the back and forth oscillations of the nose wheel at certain speeds
Shimmy damper
The best safeguards against heat buildup in aircraft tires are
Short ground rolls, slow taxi speeds , minimum braking, and proper tire inflation
Many brake types can be adapted to operate mechanically or hydraulically. Which type is not adaptable to mechanical operation?
Single disc spot type
What may be used to clean deicer boots
Soap and water
An electric motor used to raise and lower a landing gear would most likely be a:
Split field series wound motor
When servicing an air/oil shock strut with MIL.5606 the strut should be
collapsed and fluid added at the filler opening.
Two possible sources of heat for the operation of a wing thermal anti.icing system are
compressor bleed air and aircraft electrical system.
Arcing in an electrically heated windshield panel usually indicates a breakdown in the
conductive coating.
