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WorksheetsAIRFRAME Quiz
Total questions: 124
Worksheet time: 1hrs 2mins
Where is information found concerning acceptable species substitutions for wood materials used in aircraft repair?
AC 43. 13-1B
Aircraft Specifications or Type Certificate Data Sheets
Technical Standard Orders
Which of the following conditions will determine acceptance of wood with mineral streaks?
Careful inspection fails to reveal any decay
They produce only a small effect on grain direction
Local irregularities do not exceed limitations specified for spiral and diagonal grain
Compression failures in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface
At right angles to the growth rings
Parallel to the grain
At right angles to the grain
Which statement concerning wood decay is correct?
Decay that appears to be mineral streaks is acceptable
A limited amount of decay along the beveled edges of unrouted beams is acceptable
Any form or amount of decay is not permitted
In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes,
It is permissible to ream the hole, plug with hardwood, and re-drill
The spar may be reinforced by using hardwood reinforcing plates
A new section of spar should be spliced in or the spar replaced entirely
Glue deterioration in wood aircraft structure is indicated
When a joint has separated and the glue surface shows only the imprint of the wood with no wood fibers clinging to the glue
When a joint has separated and the glue surface shows pieces of wood fibers clinging to the glue
By any joint separation
The I-beam wooden spar is routed to
Increase strength
Obtain uniform strength
Reduce weight
Pin knot clusters are permitted in wood aircraft structure provided
They produce a small effect on grain direction
They have no mineral streaks
No pitch pockets are within 12 inches
Which statement about wood decay is correct?
Decay that occur before the wood is seasoned does not affect the strength of the finished piece
A limited amount of certain kinds of decay is acceptable in aircraft woods since decay affects the binding between the fibers and not the fibers themselves
Decay is not acceptable in any form or amount
Any wooden member that has been overstressed is subject to which type of failure?
Bond failure
Compression failure
Finish failure
The cantilever wing uses
External struts or wire bracing
No external bracing
The skin to carry most of the load to the wing butt
Laminated wood is sometimes used in the construction of highly stressed aircraft components. This wood can be identified by its
Parallel grain construction
Similarity to standard plywood construction
Perpendicular grain construction
Laminated wood spars may be substituted for solid rectangular wood spars
Only in certain instances where the primary load is shared by one or more other original structural member
If the same quality wood is used in both
Only upon specific approval by the manufacturer or the FAA
A faint line running across the grain of a wood spar generally indicates
Compression failure
Shear failure
Decay
When patching a plywood skin, abrupt changes in cross-sectional areas which will develop dangerous stress concentration should be avoided by using
Circular or elliptical patches
Square patches
Doublers with any desired shaped patches
The strength of a well-designed and properly prepared wood splice joint is provided by the
Bearing surface of the wood fibers
Glue
Reinforcement plates
Excessive wear in the shoulder area of an aircraft tire is an indication of
Overinflation
Excessive toe-in
Underinflation
How long should you wait after a flight before checking tire pressure?
At least 2 hours (3 hours in hot weather)
At least 3 hours (4 hours in hot weather)
At least 4 hours (5 hours in hot weather)
Aside from an external leak in the line, what will cause parking brakes to continually bleed off pressure?
An internal leak in the master cylinder
Insufficient hydraulic fluid in the reservoir
Glazed brake linings
The purpose of an orifice check valve is to
Relieve pressure to a sensitive component
Restrict flow in one direction and allow free flow in the other
Relieve pressure in one direction and prevent flow in the other direction
Aircraft brakes requiring a large volume of fluid to operate the brakes generally
Use independent master cylinder systems
Do not use brake system accumulators
Use power brake control valves
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
Cannot allow full debooster piston travel without fluid from the high pressure side entering the low pressure chamber
Must be bled separately after brake bleeding has been completed
What would be the effect if the piston return spring broke in a brake master cylinder?
The brakes would become spongy
The brake would become excessive
The brakes would drag
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 bypass valve
An orifice check valve
A shuttle valve
Instructions concerning the type of fluid and amount of air pressure to be put in a shock strut are found
On the airplane data plate
In the aircraft operations limitations
In the aircraft manufacturer’s service manual
The metering pin in oleo shock struts serve to
Lock the struts in the DOWN position.
Retard the flow of oil as the struts are composed.
Meter the proper amount of air in struts.
On an air valve core stem, what indicates high-pressure type?
An embossed letter ‘NP’
An embossed letter ‘HP’
An embossed letter ‘H’
The purpose of a relief system valve in a brake assembly system is to
Reduce pressure for break application
Prevent the tire from skipping
Compensate for the thermal expansion
In shock struts, chevron seals are used to
Absorb bottoming effect
Prevent oil from escaping
serve as a bearing surface
The left brake is dragging excessively on an airplane on which no recent brake service work has been performed. The most probable cause is.
Foreign particles stuck in the master cylinder compensating port.
Excessively worn brake linings.
Low fluid supply in the brake system reservoir.
A stripe or mark applied to a wheel rim and extending onto the sidewall of a tube-type tire is a
Slippage mark.
Wheel-to-tire balance mark
Wheel weight reference mark
Chines are used on some aircraft nose wheel tire to help
Nose gear extension at higher air speeds.
Reduce the possibility of hydroplaning.
Deflecting water away from the fuselage.
An electric motor used to raise and lower a landing gear would most likely be a
Shunt field series-wound motor.
Split field shunt-wound motor.
Split field series-wound motor.
What device in a hydraulic system with a constant-delivery pump allows circulation of the fluid no demands are on the system?
Pressure relief valve.
Shuttle valve
Pressure regulator
A hydraulic system referred to as a ‘power pack’ system will
Have an engine-driven pump for greater pressure
Have all hydraulic power components located in one circuit.
Have a pressurized reservoir.
What is the purpose of the torque links attached to the cylinder and piston of a landing gear oleo strut?
Limit compression stroke.
Hold the strut in place.
Maintain correct wheel alignment.
Debooster valves are used in brake system primarily to
Ensure rapid application and release of the brakes.
Reduce brake pressure and maintains static pressure.
Reduce the pressure and release the brakes rapidly.
In brakes service work, the term ‘bleeding brakes’ is the process of:
Withdrawing air only from the system.
Withdrawing fluid from the system for the purpose of removing air that has entered the system.
Replacing small amounts of fluid in reservoir.
Extension of an oleo shock strut is measured to determine the:
Amount of oil in the strut.
Physical condition of the strut itself.
Proper operating position of the strut.
Many brake types can be adapted to operate mechanically or hydraulically. Which type is not adaptable to mechanical operation?
Single-disk spot type.
Single-servo type.
Expander-tube type.
Debooster cylinders are used in brake systems primarily to:
Reduce brake pressure and maintain static pressure.
Relieve excessive fluid and ensure a positive release.
Reduce the pressure to the brake and increase the volume of fluid flow.
What condition would most likely cause excessive fluctuation of the pressure gauge when the hydraulic pump is operating?
Accumulator air pressure low
Inadequate supply of fluid
System relief valve sticking closed
If an airplane equipped with master cylinders and single-disk brake pedal travel, but the brakes are hard and effective, the probable cause is
The master cylinder one-way cup is leaking
Worn brake linings
Worn brake disk causing excessive clearance between the notches on the perimeter of the disk and the splines or keys on the wheel
A flexible hydraulic hose identified as MIL-H-8788 will have a stripe running the length of the hose. The stripe
Is used to ensure that the hose is installed without excessive twisting
Identifies that the hose is for high pressure fluids, with a 60 degree flexing range
Identifies that the hose is constructed of Teflon and is suitable for a wide temperature range
An automatic damping action at the steering damper if for any reason the flow of high-pressure fluid is removed from the
Outlet of the steering damper
Inlet of the steering damper
Replenishing check valve
A brake debooster valve is installed in systems where the high pressure of the hydraulic system (300 psi) is used to operate brakes
That are designed to work with lower pressure
That are used in conjunction with an antiskid system
That are used on aircraft having high landing speeds
The repair of 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
Shimming the axle in the oleo trunnion
Inserting, removing, or changing the location of washers or spacers at the center pivotal point of the scissors torque links
Placing shims or spacers behind the bearing of the out-of-tolerance wheel or wheels.
If the extended longitudinal axis of the main landing gear wheel assemblies in intersects aft of the aircraft, the wheels can be termed as having
Toe-out
Toe- in
Negative amber
An O-ring intended for use in a hydraulic system using MIL-H5606 (mineral base) fluid will be marked with
A blue striper or dot
one or more white dots.
A white and yellow stripe.
When an empty shock strut is filled with fluid, care should be taken to extend and compress the strut completely at least two times to
Thoroughly lubricate the piston rod
Force out any excess fluid
Ensure proper packing ring sealing and removal of air bubbles.
When installing a chevron-type seal in an aircraft hydraulic cylinder, the open side of the seal should face
Opposite direction of fluid pressure
Up or forward when the unit is installed in a horizontal position.
The direction of fluid pressure.
Internal leakage in a brake master cylinder unit can cause
Fading brakes
Slow release of brakes
The pedal to slowly creep down while pedal pressure is applied.
Why do most aircraft tire manufacturers recommend that the tubes in newly installed tire must be first inflated, fully deflated and the re-inflated to the correct pressure?
To allow the tube to position itself correctly inside the tire.
To eliminate all the air between the tube and the inside of the tire
To test the entire assembly leaks
Exposure to and/or storage near which of the following is considered harmful to the aircraft tires?
2. Fuel, 3. Oil, 4. Ozone, 5. Helium, 6. Electrical equipment, 7. Hydraulic fluid, 8. Solvents
1. Humidity, 2. Fuel, 3. Oil, 5. Helium, 7. Hydraulic fluid, 8. Solvents
2. Fuel, 3. Oil, 4. Ozone, 6. Electrical equipment, 7. Hydraulic fluid, 8. Solvents
What action of any, should be taken when there is a difference of more than 5 pounds of air pressure in tires mounted as duals?
Replace both tires
Correct the discrepancy and enter in the aircraft records
Replace the tire with the lowest pressure
Excessive wear in the center of the tread of an aircraft tire is an indication of
Incorrect camber
Excessive toe-out
Over inflation
How can it be determined that all air has been purged from a master cylinder brake system?
By operating a hydraulic unit and watching the system pressure gauge for smooth, full- scale deflection.
By noting whether the brake is firm or spongy
By noting the amount of fluid return to the master cylinder upon brake release.
After performing maintenance of an aircraft’s landing gear system which may have affected the system’s operation, it usually necessary to
Conduct a flight test.
Re-inspected the area after the first flight.
Make an operational check with the aircraft on jacks
What is the purpose of compensating port or valve in a brake master cylinder of an independent brake system?
Permits the fluid flow toward or away from the reservoir as temperature changes.
Assists in the master cylinder piston return.
Prevents fluid from flowing back to the reservoir.
A filter incorporating specially treated cellulose paper is identified as a
Sediment trap
Cuno filter
Micronic filter
A landing gear position and warning system will provide a warning in the cockpit when throttle is
Retarded and gear is not down and locked.
Advanced and gear is down and locked.
Retarded and gear is down and locked.
The hydraulic packing seal used in a landing gear shock strut are
Generally designed to be compatible with more than one type of fluid.
Keep from direct contact with fluid Teflon or nylon back up rings.
Used only with a specific type of fluid.
The best safeguards against heat buildup in aircraft tires are
Proper tire inflation, minimum braking, and ground rolls into the wind
Short ground rolls, slow taxi speeds, minimum braking and proper tire inflation
Minimum braking, proper tire inflation, and long ground rolls.
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
A violation of the Federal Aviation Regulations
A minor repair
Preventive maintenance
What is the function of a cam incorporated in a nose landing gear shock strut?
Provides an internal shimmy damper
Straightens the nose wheel
Provides steering of aircraft during ground operation.
Why do tire and wheel manufacturers often recommended that the tires on split rim wheels be deflated before removing the wheel from the axle?
To relieve the strain on the wheel retaining nut and axle threads.
As a safety precaution in case the bolts that hold the wheel halves together have been damaged or weakened.
To remove the static load imposed upon the wheel bearing by the inflated tire.
Nose gear centering cams are used in many retractable landing gear systems. The primary purpose of the centering device is to:
Align the nosewheel prior to touchdown.
Engage the nosewheel steering.
Center the nosewheel before it enters the wheel well.
A sleeve, spacer, or bumper ring is incorporated in a landing gear oleo shock strut to:
Limit the extension of the torque arm.
Limit the extension stroke.
Reduce the rebound effect.
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:
The hydraulic master cylinder piston is sticking.
Air in the brake hydraulic system.
The hydraulic master cylinder piston return spring is weak.
A special bolt in a landing gear attachment requires a torque value of 440 inch-pounds. How many foot-pounds are required?
36.8
38
36.6
If a brake debooster is used in a hydraulic brake system, its position in the system will be:
Between the pressure manifold of the main hydraulic system and the power brake control valve.
Between the brake control valve and the brake actuating cylinder.
In the brake pressure line between the brake pedal and the brake accumulator.
Which statement is true with respect to an aircraft equipped with hydraulically operated multiple-disk type brake assemblies?
There are no minimum or maximum disk clearance checks required due to the use of self-compensating cylinder assemblies.
Do not set parking brake when brakes are hot.
No parking brake provisions are possible for this type of brake assembly.
What is one effect a restricted compensator port of a master cylinder will have on a brake system?
The brakes will operate normally.
The reservoir will be filled by reverse flow.
The restriction will cause slow release of the brakes.
On all aircraft equipped with retractable landing gear, some means must be provided to:
Retract and extend the landing gear if the normal operating mechanism fails.
Extend the landing gear if the normal operating mechanism fails.
Prevent the throttle from being reduced below a safe power setting while the landing gear is retracted.
Overinflated aircraft tires may cause damage to the:
Brake linings.
Wheel hub.
Wheel flange.
When servicing an air/oil shock strut with MIL-5606 the strut should be:
Collapsed and fluid added at the filler opening.
Fully extended and fluid added at the filler opening.
Partially extended and fluid added at the filler opening.
Aircraft tire pressure should be checked:
Using only a push on stick-type gauge having 1-pound increments.
At least once a week or more often.
As soon as possible after each flight.
A pilot reports that the brake pedals have excessive travel. A probable cause is:
Weak return springs.
Lack of fluid in the brake system.
Oil or some foreign matter on the brake rotors and linings.
What should be checked when a shock strut bottoms during a landing?
Air pressure.
Packing seals for correct installation.
Fluid level.
The primary purpose for balancing aircraft wheel assemblies is to:
Prevent heavy spots and reduce vibration.
Distribute the aircraft weight properly.
Reduce excessive wear and turbulence.
A fully-charged hydraulic accumulator provides:
Air pressure to the various hydraulic components.
A source for additional hydraulic power when heavy demands are placed on the system.
Positive fluid flow to the pump inlet.
The correct inflation pressure for an aircraft tire can be obtained from:
Tire manufacturer’s specifications.
The aircraft service manual.
The information stamped on the aircraft wheel.
When a properly operating fusible plug has allowed a tire to deflate, the tire should be:
Replaced.
Externally inspected for damage.
Removed from the wheel and inspected for carcass and tread damage.
If it is determined that spongy brake action is not caused by air in the brake system, what is the next most likely cause?
Worn brake lining.
Internal leakage in the master cylinder.
Deteriorated flexible hoses.
If an aircraft shock strut (air/oil type) bottoms upon initial landing contact, but functions correctly during taxi, the most probable cause is:
Low fluid.
Low air charge.
A restricted metering pin orifice.
On most aircraft, the oil level of an air and oil shock strut is check by:
Removing the oil filler plug and inserting a gauge.
Measuring the length of the strut extension with a certain air pressure in the strut.
Releasing the air and seeing that the oil is the level of the filler plug.
The braking action of a Cleveland disk brake is accomplished by compressing a rotating brake disk between two opposite brake linings. How is equal pressure on both sides of the rotating disk assured?
By allowing the brake rotor to float to automatically equalize as pressure is applied to the rotor.
By allowing the caliper to float to automatically equalize as pressure is applied to the rotor.
By allowing the brake linings to automatically equalize as pressure is applied to the rotor.
If a shock strut bottoms after it has been properly serviced, the
Strut should be disassembled and the metering pin orifice plate replaced.
Air pressure should be increased.
Strut should be removed, disassembled, and inspected.
Power boost brake systems are used on aircraft that have:
High landing speeds.
Low normal hydraulic system pressure.
More than one brake assembly per axle.
The pressure source for power brakes is:
The main hydraulic system.
The power brake reservoir.
A master cylinder.
A high-speed aircraft tire with a sound cord body and bead may be recapped
A maximum of three times.
Only by the tire manufacturer.
An indefinite number of times.
When an air/oil type of landing gear shock strut is used, the initial shock of landing is cushioned by:
Compression of the air charge.
The fluid being forced through a metered opening.
Compression of the fluid.
To prevent a very rapid extension of an oleo shock strut after initial compression resulting from landing impact,
Various types of valves or orifices are used which restrict the reverse fluid flow.
The metering pin gradually reduces the size of the orifice as the shock strut extends.
The air is forced through a restricted orifice in the reverse direction.
The purpose of a sequence valve in a hydraulic retractable landing gear system is to:
Prevent heavy landing gear from falling too rapidly upon extension.
Provide a means of disconnecting the normal source of hydraulic power and connection the emergency source of power.
Ensure the operation of the landing gear and gear doors in the proper order.
When bleeding aircraft brakes, one of the indications that the air has been purged from the system is:
Partial brake pedal travel.
Full brake pedal travel.
Firm brake pedals.
Which of the following is a hazard associated with sanding on fabric covered surfaces during the finishing process?
Overheating of the fabric/finish especially with the use of power tools
Static electricity buildup
Embedding of particles in the finish
What is likely to occur if hydrated wash primer is applied to unpainted aluminum and then about 30 to 40 minutes later a finish topcoat, when the humidity is low?
Corrosion
A glossy, blush-free finish
A dull finish due to the topcoat ‘sinking in’ to primer that is still too soft
Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden changes in temperature?
Orange peel
Blushing
Pinholes
What is used to slow the drying time of some finishes and to prevent blush?
Reducer
Retarder
Rejuvenator
What is the usual cause of runs and sags in aircraft finishes?
Too much material applied in one coat
Material is being applied too fast
Low atmospheric humidity
Which properly applied finish topcoat is the most durable and chemical resistant?
Synthetic enamel
Acrylic lacquer
Polyurethane
Which type of coating typically includes phosphoric acid as one of its components at the time of application?
Wash primer
Epoxy primer
Zinc chromate primer
Aluminum-pigment in dope is used primarily to
Provide a silver color
Aid in sealing out moisture from the fabric
Reflect ultraviolet from the fabric
Fungicidal dopes are used in aircraft finishing as the
First, full-bodied, brushed-on coat to prevent fungus damage
First coat to prevent fabric rotting and are applied thin enough to saturate the fabric
Final, full-bodied, brushed-on coat to reduce blushing
Which statement is true regarding paint system compatibility?
Old-type zinc chromate primer may not be used directly for touchup of bare metal surfaces
Acrylic nitrocellulose lacquers may be used old nitrocellulose finishes
Old wash primer coats may be overcoated directly with epoxy finishes
A correct use for acetone is to
Thin zinc chromate primer
Remove grease from fabric
Thin dope
Before applying a protective coating to any unpainted clean aluminum, you should
Wipe the surface with avgas or kerosene
Remove any conversion coating film
Avoid touching the surface with bare hands
If registration numbers are to be applied to an aircraft with a letter height of 12 inches, what is the minimum space required for the registration mark N1683C?
52 inches
48 inches
57 inches
What is likely to occur if unhydrated wash primer is applied to unpainted aluminum and then about 30 to 40 minutes later a finish topcoat, when the humidity is low?
Corrosion
A glossy, blush-free finish
A dull finish due to the topcoat ‘sinking in’ to primer that is still too soft
If masking tape is applied to an aircraft such as for trim spraying, and is left on for several days and/or exposed to heat, it is likely that the tape will
Not seal out the finishing material if the delay or heating occurs before spraying
Be weakened in its ability to adhere to the surface
Cure to the finish and be very difficult to remove
The purpose of the vertical fin is to provide
Directional stability
Longitudinal stability
Lateral stability
A universal propeller protractor used to measure the degrees of aileron travel should be zeroed
With the aileron in the NEUTRAL position
With the aileron in the DOWN position
When the aircraft is in a level flight attitude
Other than the manufacturer maintenance manual what other document could be used to determine the primary flight control surface deflection for an imported aircraft that is reassembled after shipment?
Aircraft type certificate data sheet
Import manual for the aircraft
The certificate of airworthiness issued by the importing country
If all instructions issued by the swaging tool manufacturer are followed when swaging a cable terminal, the resultant swaged terminal strength should be
The full rated strength of the cable
80 percent of the full rated strength of the cable
70 percent of the full rated strength of the cable
If control cables are adjusted properly and the control surfaces tend to vibrate, the probable cause is
Worn attachment fittings
Oil can effect on the control surfaces
Excessive cable tension
Fairleads should never deflect the alignment of a cable more than
12°
8°
3°
Movement about the longitudinal axis (roll) in a helicopter is affected by movement of the
Collective pitch control
Cyclic pitch control
Tail rotor pitch control
What physical factors are involved in the aspect ratio of airplane wings?
Thickness and chord
Span and chord
Dihedral and angle of attack
A reduction in anti-torque thrust will cause the
Tail pivot in the opposite direction of torque rotation around the main rotor axis
Tail to pivot in the direction of torque rotation around the main rotor axis
Anti-torque system to become more efficient in the hover mode
Which statement concerning the 100-hour inspection of an airplane equipped with a push-pull tube-type control system is true?
The threaded rod ends should not be adjusted in length for rigging purposes because the rod ends have been properly positioned and staked during manufacture
The terminal end threads of the turnbuckles should be visible through the safety hole in the barrel
The threaded rod ends should be checked for the amount of thread engagement by means of the inspection hole provided
Main rotor blades that do not cone by the same amount during rotation are said to be out of
Balance
Collective pitch
Track
An airplane which has good longitudinal stability should have a minimum tendency to
Roll
Pitch
Yaw
Movement about the lateral axis (pitch) in a helicopter is effected by movement of the
Collective pitch control
Cyclic pitch control
Tail rotor pitch control
The chord of a wing is measured from
(a)
