2210 final Word Scramble

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Question	Answer
A faint line running across the grain of a wood spar generally indicates?	Compression Failure
The I-beam wooden spar is routed to?	Reduce weight
The strength of a well-designed and properly prepared wood splice joint is provided by the?	Glue
Any wooden member that has been overstressed is subject to which type of failure?	Compression
Where is information found concerning acceptable species substitutions for wood materials used in aircraft repair?	AC 43.13-1B
Which of the following conditions will determine acceptance of wood with mineral streaks?	Careful inspection fails to reveal any decay
Which statement concerning wood decay is correct?	Any form or amount of decay is not permitted.
Pin knot clusters are permitted in wood aircraft structure provided?	They produce a small effect on grain direction.
laminated wood spars may be substituted for solid rectangular wood spars?	If the same quality wood is used in both
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.
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 grain
The strength classification of fabrics used in aircraft covering is based on?	Tensile strength
fungicide and mildewicide additives are important for fabric covered aircraft, such as?	Cotton and linen
Moisture, mildew, chemicals, and acids have no effect on?	Glass fabric
When testing the strength of Grade A cotton fabric covering an aircraft that requires only intermediate grade, the minimum acceptable strength the fabric must have is?	70 percent of the original strength for intermediate fabric.
When dope-proofing the parts of the aircraft structure that come in contact with doped fabric, which of the following provide an acceptable protective coating?	Aluminum foil and cellulose tape.
When and how is finishing tape applied on a fabric-covered aircraft?	Doped on after the first or second coat of dope.
Finishing tape (surface tape) is used for what purpose?	To provide additional wear resistance over the edges of fabric forming structures.
Which statement is true regarding paint system compatibility?	Old wash primer coats may be overcoated directly with epoxy finishes.
Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden changes in temperature?	Blushing
Which type of coating typically includes phosphoric acid as one of its components at the time of application?	Wash primer
What is used to slow the drying time of some finishes and to prevent blush?	Retarder
Which properly applied finish topcoat is the most durable and chemical resistant?	Polyurethane
Aluminum pigment in dope is used primarily to?	reflect ultraviolet from the fabric.
What is the usual cause of runs and sags in aircraft finishes?	Too much material applied in one coat
Before applying a protective coating to any unpainted clean aluminum, you should?	avoid touching the surface with bare hands
Which of the following is a hazard associated with sanding on fabric covered surfaces during the finishing process?	Static electricity buildup
Fungicidal dopes are used in aircraft finishing as the	first coat to prevent fabric rotting and are applied thin enough to saturate the fabric.
The classification for fiberglass reinforcement material that has high resistivity and is the most common is?	E-glass
What type of bit should be used to drill holes in Plexiglass?	A specially modified twist drill.
A category of plastic material that is capable of softening or flowing when reheated is described as a	Thermoplastic
Which of the following are benefits of using microballoons when making repairs to laminated honeycomb panels?	Improved strength-to-weight ratio, less density, and lower stress concentrations.
Which of the following are generally characteristic of aramid fiber (Kevlar) composites?	High tensile strength and flexibility.
Fiberglass laminate damage that extends completely through one facing and into the core?	requires the replacement of the damaged core and facing.
Which of the following drill bit types work best when drilling an aramid fiber (Kevlar) composite laminate?	Carbide W-point
Composite fabric material is considered to be the strongest in what direction?	Warp
How does acoustic emission testing detect defects in composite materials?	By picking up the 'noise' of any deterioration that may be present.
When making repairs to fiberglass, cleaning of the area to be repaired is essential for a good bond. The final cleaning should be made using	MEK
What reference tool is used to determine how the fiber is to be oriented for a particular ply of fabric?	Warp clock (or compass)?
Repairing advanced composites using materials and techniques traditionally used for fiberglass repairs is likely to result in?	an unairworthy repair
One method of inspecting a laminated fiberglass structure that has been subjected to damage is to	strip the damaged area of all paint and shine a strong light through the structure.
The classification for high tensile strength fiberglass used in aircraft structures is	S-glass
Which of the following are generally characteristic of carbon/graphite fiber composites?	Stiffness, high compressive strength, and corrosive effect in contact with aluminum.
One of the best ways to assure that a properly prepared batch of matrix resin has been achieved is to	Have mixed enough for a test sample
The part of a replacement honeycomb core that must line up with the adjacent original is the	ribbon direction
Sandwich panels made of honeycomb construction are used on aircraft because this type of construction	saves weight while not compromising strength.
What precaution, if any, should be taken to prevent corrosion inside a repaired metal honeycomb structure?	Prime the repair with a corrosion inhibitor and seal from the atmosphere.
When inspecting a composite panel using the ring test/tapping method, a dull thud may indicate	separation of the laminates.
Which fiber to resin (percent) ratio for advanced composite wet lay-ups is generally considered the best for strength?	60:40
When repairing large, flat surfaces with polyester resins, warping of the surface is likely to occur. One method of reducing the amount of warpage is to	use short strips of fiberglass in the bonded repair.
The strength and stiffness of a properly constructed composite buildup depends primarily on	the orientation of the plies to the load direction
Proper prepreg composite lay-up curing is generally accomplished by	applying external heat and pressure.
The length of time that a catalyzed resin will remain in a workable state is called the	Pot life
The preferred way to make permanent repairs on composites is by	laminating on new repair plies
Fiberglass damage that extends completely through a laminated sandwich structure?	May be repaired
When conducting a tap test on a composite panel, which of the following sounds would indicate delamination?	Dull thud
What is the material layer used within the vacuum bag pressure system to absorb excess resin during curing called?	Bleeder
When necessary, what type of cutting fluid is usually acceptable for machining composite laminates?	Water
Fiberglass laminate damage not exceeding the first layer or ply can be repaired by	filling with a putty consisting of a compatible resin and clean, short glass fibers.
Superficial scars, scratches, surface abrasion, or rain erosion on fiberglass laminates can generally be repaired by applying	one or more coats of suitable resin (room-temperature catalyzed) to the surface
Which of the following, when added to wet resins, provide strength for the repair of damaged fastener holes in composite panels?	Flox and chopped fibers
What is the danger of a wooden aircraft structure in which the wood holds moisture content of over 20%	The growth of fungus
In order to properly inspect wood structure of an aircraft, the wooden components must be.	Dry
Glued joints are typically designed to take what type of load?	Shear
A faint line running across the grain of a wood spar generally indicates	Compression failure
Which of the following types of wood has the greatest strength properties	Douglas Fir
The slope of the grain of any wood used for aircraft may not be greater than	1:15
In what circumstances are the presence of pin knot clusters acceptable on a structural member of a wooden aircraft	If their effect on the grain direction is minimal
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 grain
Which of the following is most important for successful gluing of structural wood joints.	The ambient temperature
If the allowable temperature of a wood adhesive is listed as 62-80 degrees, at what temperature will the usable pot life be longest	62 degrees
When bevel is being cut to repair a cap strip on a wing rib, the length of the beveled area should be	10 times the thickness of the rib cap strip
What is the purpose of a gusset plate used in the construction and repair of aircraft structures	To join and reinforce intersecting structural members
If elongated bolt holes are discovered while inspecting a wooden wing spar, which is the minimum required repair	The section of spar or the entire spar must be replaced
Holes bored for bolts which will hold fittings in place should be cut	To match the hole diameter of the fitting
In what circumstances are mineral streaks found in wood to be used for structural repair acceptable	As long as decay is not found in the streaked area
When patching a plywood skin, abrupt changes in the cross sectional area which will develop dangerous stress concentration should be avoided by using	Circular or elliptical patches
When installing a plug patch to repair a plywood skin, to what size is the patch cut	To the exact dimension of the hole
The strength and stiffness of a properly constructed composite buildup depends primarily on	the orientation of the plies.
Composite fabric material is considered to be the strongest in what direction?	Warp
What reference tool is used to determine how the fiber is to be oriented for a particular ply of fabric?	Warp Clock (or Compass)
The classification for high tensile strength fiberglass used in aircraft structures is	S-glass.
Which of the following are generally characteristic of Aramid fiber (Kevlar®) composites? 1. High tensile strength 2. Flexibility 3. Stiffness 4. High compressive strength 5. Ability to conduct electricity	1 and 2
Which of the following are generally characteristic of carbon/ graphite fiber composites? 1. Flexibility 2. Stiffness 3. High compressive strength 4. Corrosive effect in contact with aluminum 5. Ability to conduct electricity	2, 3, and 4
The maximum tensile strength of fiber reinforced plastic is achieved using	unidirectional fibers.
Lightning protective fibers on aircraft provide	less electrically resistive surface to aid in lightning dissipation.
The principle advantage of polyimide resin is that it offers	high temperature resistance.
The curing process of a mixed resin may be temporarily stopped by.	placing it in a freezer
On a prepreg composite tape, once the chemical reaction within the resin has begun,	the tape is ready to be applied.
Which composite adhesive type must be stored at the oldest temperature of the three?	Film adhesives
Which fiber to resin (percent) ratio for advanced composite wet lay-ups is generally considered the best for strength?	60:40
The most frequent cause of damage to composite parts are	impacts to the surface by debris
Corrosion is a factor with composite aircraft components when	lighting protective plies are installed
Tap testing of a composite structure produces the most detectable results on	thin composite honeycomb skin.
When inspecting a composite panel using the ring test/ coin test tapping method, a dull thud sound may indicate	a delamination In the matrix mix
Composite inspections conducted by means of ultrasonic monitoring	pick up the "noise" of corrosion or other deterioration occurring.
Which of the following is an advantage of prepreg composites?	Does not have a problem of a lean or rich mix.
What is the material layer used within the vacuum bag pressure system to absorb excess resin during curing called?	Bleeder
The principle advantage to curing composite parts with an autoclave versus a standard oven is	allows curing in higher temperatures and pressures.
When curing an on-aircraft composite repair, a heat blanket is used to maintain the proper curing temperature. What is used to insure a proper contact between the blanket and the part?	Vacuum Bags
The minimum number of thermocouples used to monitor a heat cycle is	no fewer than three
To prevent premature curing, all prepreg materials must be stored	in a refrigerated environment under 0°F
The principle benefit of vacuum bagging over a wet layup is it	removes excess resin uniformly from the structure.
The maximum design properties of a fiberglass component are achieved at what curing temperature	150°F
A potted compound repair on honeycomb can usually be made on damages less than	5 inches in diameter.
Sandwich panels made of honeycomb construction are used on aircraft because this type of construction.	saves weight while not compromising strength.
Which is not a step to ensure proper bonding of a composite patch to an aluminum surface	install anchor tabs on the aluminum surface.
The purpose of a double vacuum debulk process when repairing laminated fiberglass structures is to remove	air from between the laminations.
Metal fasteners which may be used with repairs of carbon fiber structures are made from?	Titanium
The principle difference between composite structure fasteners and metal structure fasteners is that composite fasteners	have larger bearing surfaces.
When drilling into composite structures the general rule is to use	high speed, low pressure drills.
The best cutting tool to use on composite honeycomb structures is a	toothless diamond coated saw blade.
Health problems resulting from composite repair processes are best avoided by.	consulting Material Data Safety Sheets (MSDS).
Which of the following is true regarding thermoplastics versus thermosetting plastics?	Thermoplastics must be stored in a cool and dry location.
What is the cause of crazing on an acrylic plastic panel?	It was heated to an excess temperature when forming
When drilling through acrylic plastics, a drill bit with an included tip angle of is recommended.	150°
Which is true regarding the use of polymerizable cements with transparent plastics?	Remaining beads of cement are easily machined off.
When installing transparent plastic enclosures that are retained by bolts extending through the plastic material and self-locking nuts, the nuts should be tightened to	A firm fit, then backed off one full turn.
Which is considered good practice concerning the installation of acrylic plastics?	When rivets are used, drill the mounting holes through the plastic oversize by 1/8 inch.
Which of the following is an acceptable combination of materials and its fasteners?	Kevlar composite materials with cadmium coated fasteners.

Created by: Lucas1999