8001-8101
A category of plastic material that is capable of softening or flowing when reheated in described as a A—thermoplastic B—thermocure C—thermoset
A
A faint line running across the grain of a wood spar generally indicates A—compression failure B—shear failure C—decay
A
A main difference between Lockbolt/Huckbolt tension shear fasteners (other than their application) is in the A—number of locking collar grooves. B—shape of the head C—method of installation
A
Alloy 2117 rivets are heat treated A—by the manufacturer and do not require heat treatment before being driven B—by the manufacturer but require reheat treatment before being driven C—to a temperature of 910 to 930ºF and quenched in cold water
A
Fabric rejuvenator is used to A—restore the condition of dope coatings B—restore fabric strength and tautness to at least the minimum acceptable level C—penetrate the fabric and restore fungicidal resistance
A
Fiberglass damage that extends completely through a laminated sandwich structure A—may be repaired B—must be filled will resin to eliminate dangerous stress concentrations C—may be filled with putty which is compatible with resin
A
Fiberglass laminate damage not exceeding the first layer or ply can be repaired by A—filling with a putty consisting of a compatible resin and clean, short glass fibers B—sanding the damaged area until aerodynamic smoothness is obtained C—trimming the rough edges and sealing with paint
A
Glue deterioration in wood aircraft structure is indicated A—when a joint has separated and the glue surface shows only the imprint of the wood with no wood fibers clinging to the glue B—when a joint has separated and the glue surface shows pieces of wood and/or wood fibers clinging to the glue C—by any joint separation
A
Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the A—possibility of causing delamination B—increased possibility of fretting corrosion in the fastener C—difficulty in forming a proper shop head
A
How does acoustic emission testing detect defects in composite materials? A—By picking up the "noise" of any deterioration that may be present B—By analyzing ultrasonic signals transmitted into the parts being inspected C—By creating sonogram pictures of the areas being inspected
A
How many MS20470 AD-4-6 rivets will be required to attach a 10 x 5 inch plate, using a single row of rivets, minimum edge distance, and 4D spacing? A—56 B—54 C—52
A
How many of the following are benefits of using micro balloons when making repairs to laminated honeycomb panels? 1. Greater concentrations of resin in edges and corners 2. Improved strength to weight ratio 3. Less density 4. Lower stress concentrations A—2, 3, and 4 B—1, 2, and 4 C—All of the above
A
Laminated wood is sometimes used in the construction of highly stressed aircraft components. This wood can be identified by its A—parallel grain construction B—similarity to standard plywood construction C—perpendicular grain construction
A
Moisture, mildew, chemicals, and acids have no effect on A—glass fabric B—linen fabric C—Dacron fabric
A
One method of inspecting a laminated fiberglass structure that has been subjected to damage is to A—strip the damaged area of all paint and shine a strong light through the structurer B—use dye-penetrant inspection procedures, exposing the entire damaged area to the penetrant solution C—use an eddy current probe on both sides of the damage area
A
Pin knot clusters are permitted in wood aircraft structure provided A—they produce a small effect on grain direction B—they have no mineral streaks C—no pitch pockets are within 12 inches
A
Sandwich panels made of metal honeycomb construction are used on modern aircraft because this type of construction A—has high strength to weight ratio B—may be repaired by gluing replacement skin to the inner core material and thermoplastic resin C—is lighter than single sheet skin of the same strength and is more corrosion resistant
A
The Dzus turnlock fastener consists of stud, grommet, and receptacle. The stud length is measured in A—hundredths of an inch B—tenths of an inch C—sixteenths of an inch
A
The classification for fiberglass reinforcement material that has high resistivity and is the most common is A—E-glass B—S-glass C—G-glass
A
The coefficient of expansion of most plastic enclosure materials is A—greater than both steel and aluminum B—greater than steel but less than aluminum C—less than either steel or aluminum
A
The length of time that a catalyzed resin will remain in a workable state is called the A—pot life B—shelf life C—service life
A
The markings on the head of a Dzus fastener identify the A—body diameter, type of head, and length of the fastener B—body, head diameter, and type of material C—manufacturer and type of material
A
The shop head of a rivet should be A—one and one-half times the diameter of the rivet shank B—one-half times the diameter of the rivet shank C—one and one-half times the diameter of the manufactured head of the rivet
A
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? A—Corrosion B—A glossy, blush-free finish C—A dull finish due to the topcoat "sinking in" to primer that is still too soft
A
What is the material layer used within the vacuum bag pressure system to absorb excess resin during curing called? A—Bleeder B—Breather C—Release
A
What is the usual cause of runs and sags in aircraft finishes? A—Too much material applied in one coat B—Material is being applied too fast C—Low atmospheric humidity
A
What precaution, if any, should be taken to prevent corrosion inside a repaired metal honeycomb structure? A—Prime the repair with a corrosion inhibitor and seal from the atmosphere B—Paint the outside area with several coats of exterior paint C—None. Honeycomb is usually made from a man made or fibrous material which is not susceptible to corrosion
A
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 A—MEK (methyl ethyl ketone) B—soap, water, and scrub brush C—a thixotropic agent
A
When patching a plywood skin, abrupt changes in cross-sectional areas which will develop dangerous stress concentration should be avoided by using A—circular or elliptical patches B—square patches C—doublers with any desired shaped patches
A
Which is an identifying characteristic of acrylic plastics? A—Zinc chloride will have no effect B—Acrylic has a yellowish tint when viewed from the edge C—Acetone will not soften plastic, but will change its color
A
Which of the following are generally characteristic of aramid fiber (Kevlar) composites? 1. High tensile strength 2. Flexibility 3. Stiffness 4. Corrosive effect in contact with aluminum 5. Ability to conduct electricity A—1 and 2 B—2, 3, and 4 C—1, 3, and 5
A
Which of the following conditions will determine acceptance of wood with mineral streaks? A—Careful inspection fails to reveal any decay B—They produce only a small effect on grain direction C—Local irregularities do not exceed limitations specified for spiral and diagonal grain
A
Which of the following, when added to wet resins, provide strength for the repair of damaged fastener holes in composite panels? 1. Micro balloons 2. Flox 3. Chopped fibers A—2 and 3 B—1 and 3 C—1, 2, and 3
A
Which type of coating typically includes phosphoric acid as one of its components at the time of application? A—Wash primer B—Epoxy primer C—Zinc chromate primer
A
(1) Machine-sewn seams in aircraft covering fabrics may be of the folded-fell or French-fell types (2) A plain lapped seam is never permissible Regarding the above statements, A—both No.1 and No.2 are true B—only No.1 is true C—only No.2 is true
B
(1) When performing a ring (coin tap) test on composite structures, a change in sound may be due to damage or to transition to a different internal structure (2) The extent of separation damage in composite structures is most accurately measured by a ring (coin tap) test. Regarding the above statements, A—both No.1 and No.2 is true B—only No.1 is true C—only No.2 is true
B
A correct use for acetone is to A—thin zinc chromate primer B—remove grease from the fabric C—thin dope
B
A well-designed rivet joint with subject the rivets to A—compressive loads B—Shear loads C—tension loads
B
Any wooden member that has been overstressed is subject to which type of failure? A—Bond failure B—Compression failure C—Finish failure
B
Cabin upholstery materials installed in current standard category airplanes must A—be fireproof B—be at least flame resistance C—can meet the requirements prescribed in Part 43
B
Composite fabric material in considered to be the strongest in what direction? A—Fill B—Warp C—Bias
B
Fiberglass laminate damage that extends completely through on facing and into the core A—cannot be repaired B—requires the replacement of the damaged core and facing C—can be repaired by using a typical metal facing patch
B
Finish tape (surface tape) is used for what purpose? A—To help prevent "ripple formation" in covering fabric B— To provide additional wear resistance over the edges of fabric forming structures C—To provide additional anti-tear resistance under reinforcement tape
B
Fungicidal dopes are used in aircraft finishing as the A—first, full-bodied, brushed-on coat to prevent fungus damage B—first coat to prevent fabric rotting and are applied thin enough to saturate the fabric C—final, full bodied, brushed-on coat to reduce blushing
B
Fungicide and mildewicide additives are important for fabric covered aircraft, such as A—cotton and dacron B—cotton and linen C—glass and linen
B
Laminated wood spars may be substituted for solid rectangular wood spars A—only in certain instances where the primary load is shared by one or more other original structural member B—if the same quality wood is used in both C—only upon specific approval by the manufacturer or the FAA
B
Metal fasteners used with carbon/graphite composite structures A—may be constructed of any of the metals commonly used in aircraft fasteners B—must be constructed of material such as titanium or corrosion resistant steel C—must be constructed of high strength aluminum-lithium alloy
B
Proper pre-preg composite lay-up curing is generally accomplished by 1. applying external heat. 2. room temperature exposure. 3. adding a catalyst or curing agent to the resin. 4. applying pressure. A—2 and 3 B—1 and 4 C—1, 3, and 4
B
Superficial scars, scratches, surface abrasion, or rain erosion on fiberglass laminates can generally be repaired by applying A—a piece of resin-impregnated glass fabric facing B—one or more coats of suitable resin (room-temperature catalyzed) to the surface C—a sheet of polyethylene over the abraded surface and one or more coats of resin cured with infrared heat lamps
B
The cantilever wing uses A—external struts or wire bracing B—no external bracing C—the skin to carry most of the load to the wing butt
B
The classification for high tensile strength fiberglass used in aircraft structures is A—E-glass B—S-glass C—G-glass
B
The installation of Cherrymax and Olympic-Lok rivets is accomplished by utilizing A—rivet gun, special rivet set, and bucking bar B—a pulling tool C—ordinary hand tools
B
The part of a replacement honeycomb core that must line up with the adjacent original is the A—cell side B—ribbon direction C—cell edge
B
The strength and stiffness of a properly constructed composite buildup depends primarily on A—a 60 percent matrix to 40 percent fiber ratio B—the orientation of the plies to the load direction C—the ability of the fibers to transfer stress to the matrix
B
The strength of a well-designed and properly prepared wood splice joint is provided by the A—bearing surface of the wood fibers B—glue C—reinforcement plates
B
Thread rivets (Rivnuts) are commonly used to A—join two more pieces of sheet metal where shear strength is desired B—attach parts or components with screws to sheet metal C—join two or more pieces of sheet metal where bearing strength is desired
B
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? A—Corrosion B—A glossy, blush-free finish C—A dull finish due to the topcoat "sinking in" to primer that is still too soft
B
What is the most common method of cementing transparent s plastics? A—Heat method B—Soak method C—Bevel method
B
What is used to slow the drying time of some finishes and prevent blush? A—Reducer B—Retarder C—Rejuvenator
B
What type of bit should be used to drill holes in Plexiglas? A—A standard twist drill B—A specially modified twist drill C—a dulled twist drill
B
When inspecting a composite panel using the ring test/tapping method, a dull thud may indicate A—less than full strength curing of the matrix B-separation of the laminates C—an area of too much matrix between fiber layers
B
When installing transparent plastic enclosures which are retained by bolts extending through the plastic material and self-locking buts, the nuts should be A—tightened to a firm fit, plus one full turn B—tightened to a firm fit, then backed off one full turn C—tightened to a firm fit
B
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 A—add an extra amount of catalyst to the resin B—use short strips of fiberglass in the bonded repair C—use less catalyst than normal so the repair will be more flexible
B
When repairing puncture-type damage of a metal faced laminated honeycomb panel, the edges of the doubler should be tapered to A—two times the thickness of metal B—100 times the thickness of metal C—whatever is desired for a neat, clean appearance
B
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 A—70 percent of its original strength B—70 percent of the original strength for intermediate fabric C—56 pounds per inch warp and fill
B
Which defect in aircraft finishes may be caused by adverse humidity, drafts, or sudden changes in temperature? A—Orange peel B—Blushing C—Pinholes
B
Which is considered good practice concerning the installation of acrylic plastics? A—When nuts and bolts are used, the plastic should be installed hot and tightened to a firm fit before the plastic cools B—When rivets are used, adequate spacer or other satisfactory means to prevent excessive tightening of the frame to the plastic should be provided C—When rivets or nuts and bolts are used, slotted holes are not recommended
B
Which of the following are generally characteristic of carbon/graphite fiber composites? 1. Flexibility 2. Stiffness 3. High compressive strength 4. Corrosive effect on contact with aluminum 5. Ability to conduct electricity. A—1 and 3 B—2, 3, and 4 C—1, 3, and 5
B
Which of the following is a hazard associated with sanding on fabric covered surfaces during the finishing process? A—Overheating of the fabric/finish, especially with the use of power tools B—Static electricity buildup C—Embedding of particles in the finish
B
one assure that a properly prepared batch of matrix resin has been achieved is to A—perform a chemical composition analysis B—have mixed enough for a test sample C—test the viscosity of the raisin immediately after mixing
B
A potted compound repair on honeycomb can usually be made on damages less than A—4 inches in diameter B—2 inches in diameter C—1 inch in diameter
C
Aluminum-pigment in dope is used primarily to A—provide a silver color B—aid in sealing out moisture from the fabric C—reflect ultraviolet from the fabric
C
Before applying a protective coating to any unpainted clean aluminum, you should A—wipe the surface with avgas or kerosene B—remove any conversion coating film C—avoid touching the surface with bare hands
C
Compression failures in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface A—at right angles to the growth rings B—parallel to the grain C—at right angles to the grain
C
How many fabric thicknesses will be found in a French-fell seam? A—Five B—Three C—Four
C
If a new safety belt is to be installed in an aircraft, the belt must conform to the strength requirements in which document? A—STC 1282 B—FAR Part 39 C—TSO C22
C
If an aircraft's transparent plastic enclosures exhibit fine cracks which may extend in a network over or under the surface or through the plastic, the plastic is said to be A—hazing B—brinelling C—crazing
C
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 A—not seal out the finishing material if the delay or heating occurs before spraying B—be weakened in its ability of adhere to the surface C—cure to the finish and be very difficult to remove
C
If no scratches are visible after transparent plastic enclosure materials have been cleaned, their surfaces should be A—polished with rubbing compound applied with a damp cloth B—buffed with a clean, soft, dry cloth C—covered with a thin coat of wax
C
In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes, A—it is permissible to ream the hole, plug with hardwood, and redrill B—the spar may be reinforced by using hardwood reinforcing plates C—a new section of spar should be spliced in or the spar replaced entirely
C
One of the main advantages of Hi-Lok type fasteners over earlier generations is that A—they can be removed and reused again B—the squeezed on collar installation provides a more secure, tighter fit C—they can be installed with ordinary hand tools
C
Repairing advanced composites using materials and techniques traditionally used for fiberglass repairs is likely to result in A—restored strength and flexibility B—improved wear resistance to the structure C—an unairworthy repair
C
Select the alternative which best describes the function of the flute section of a twist drill A—Provides a method for cooling oil to be delivered to the cutting surface B—Forms the area where the drill bit attaches to the drill motor C—Forms the cutting edges of the drill point
C
The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud diameter is measured in A—tenths of an inch B—hundredths of an inch C—sixteenths of an inch
C
The I-beam wooden spar is routed to A—increase strength B—obtain uniform strength C—reduce weight
C
The best method of repair for a fabric-covered surface which has an L-shaped tear, each leg of which is approximately 14 inches long, is to A—re-cover the entire bay in which the tear is located B—sew from the end of each leg to the center of the tear with a baseball stitch and then dope on a patch C—sew with a baseball stitch from the center of the tear out toward the extremity of each leg and then dope on a patch
C
The determining factor(s) for the selection of the correct weight of textile fabric to be used in covering any type of aircraft is the A—maximum wing loading B—speed of the aircraft C—speed of the aircraft and the maximum wing loading
C
The general rule for finding the proper rivet diameter is A—three times the thickness of the materials to be joined B—two times the rivet length C—three times the thickness of the thickest sheet
C
The preferred way to make permanent repairs on composites is by A—bonding a metal or cured composite patches B—riveting on metal or cured composite patches C—laminating on new repair plies
C
The strength classification of fabrics used in aircraft covering is based on A—bearing strength B—shear strength C—tensile strength
C
What is the purpose of a gusset or gusset plate used in the construction and repair of aircraft structures? A—To hold structural members in position temporarily until the permanent attachment has been completed B—To provide access for inspection of structural attachments C—To join and reinforce intersecting structural members
C
What reference tool is used to determine how the fiber is to be oriented for a particular ply of fabric? A—Fill clock (or compass) B—Bias clock (or compass) C—Warp clock (or compass)
C
When and how is finishing tape applied on a fabric covered aircraft ? A—Sewed or laced on before dope is applied B—Doped on immediately prior to the finish coat C—Doped on after the first or second coat of dope
C
When balsa wood is used to replace a damaged honeycomb core, the plug should be cut so that A—the grain is parallel to the skin B—it is about 1/8 inch undersize to allow sufficient bonding material to be applied C—the grain is perpendicular to the skin
C
When doped-proofing the parts of the aircraft structure that come in contact with doped fabric, which of the following provide an acceptable protective coating? 1. Aluminum foil 2. Resin impregnated cloth tape 3. Any one-part type metal primer 4. Cellulose tape A—1 and 2 B—3 and 4 C—1 and 4
C
When necessary, what type of cutting fluid is usually acceptable for machining composite laminates? A—Water soluble oil B—Water displacing oil C—Water only
C
Which fiber to resin (percent) ratio for advanced composite wet lay-ups is generally considered the best for strength? A—40:60 B—50:50 C—60:40
C
Which of the following drill but types work best when drilling an aramid fiber (Kevlar) composite laminate? A—Tool steel with standard grind B—Diamond dust coated C—Carbide W-point
C
Which of these methods may be used to inspect fiberglass/honeycomb structures to entrapped water? 1. Acoustic emission monitoring 2. X-ray 3. Backlighting A—1 and 2 B—1 and 3 C—2 and 3
C
Which properly applied finish topcoat is the most durable and chemical resistant? A—Synthetic enamel B—Acrylic lacquer C—Polyurethane
C
Which statement about wood decay is correct? A—Decay that occurs before the wood is seasoned does not affect the strength of the finish piece B—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 C—Decay is not acceptable in any form or amount
C
Which statement concerning wood decay is correct? A—Decay that appears to be mineral streaks is acceptable B—A limited amount of decay along the beveled edges of unrouted beams is acceptable C—Any form or amount of decay is not permitted
C
Which statement is true regarding paint system compatibility? A—Old-type zinc chromate primer may bot be used directly for touchup of bare metal surface B—Acrylic nitrocellulose lacquers may be used over old nitrocellulose finishes C—Old wash primer coats may be over coated directly with epoxy finishes
C