Term
| Laminated wood spars may be substituted for solid rectangular wood spars |
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Definition
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if the same quality wood is used in both
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Term
| The strength of a well-designed and properly prepared wood splice joint is provided by the ? |
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Definition
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Term
| Where is information found concerning acceptable species substitutions for wood materials used in aircraft repair? |
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Definition
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Term
| In cases of elongated boltholes in a wood spar or cracks in the vicinity of boltholes. |
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Definition
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a new section of spar should be spliced in or the spar replaced entirely
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Term
| A faint line running across the grain of a wood spar generally indicates |
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Definition
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Term
| Which statement about wood decay is correct? |
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Definition
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Decay is not acceptable in any form or amount.
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Term
| Which of the following conditions will determine acceptance of wood with mineral streaks? |
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Definition
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Careful inspection fails to reveal any decay
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Term
| The I-Beam wooden spar is routed to |
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Definition
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Term
| Pin knot clusters atre permitted in wood aircraft structure provided? |
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Definition
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they produce a small effect on grain direction.
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Term
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Definition
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Term
| Laminated wood is sometimes used in the construction of highly stressed aircraft components. This wood can be identified by its |
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Definition
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parallel grain construction
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Term
| when patching a plywood skin, abrupt changes in cross-sectional areas which will develop dangerous stress concentrationshould be avoided by using |
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Definition
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circular or elliptical patches
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Term
| Glue deterioration in wood aircraft structure is indicated |
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Definition
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when a joint has separated and the glue surface shows only the imprint of the wood with no wood fibers clinging to glue.
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Term
| Compression failures in wood aircraft structures are characterized by buckling of the fibers that appear as streaks on the surface. |
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Definition
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at right angles to the grain.
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Term
| When and how is finishing tape applied on a fabric-covered aircraft |
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Definition
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Doped on after the first or second coat of dope.
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Term
| 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 |
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Definition
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speed of the aircraft and the maximum wing loading
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Term
| How many fabric thicknesses will be found in a French-fell seam? |
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Definition
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Term
| Finishing tape ( surface tape) is used for what purpose? |
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Definition
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To provide additional wear resistance over the edges of fabric forming structures.
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Term
| Moisture, mildew, chemicals, and acids have no effect on? |
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Definition
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Term
| The best method of repair for a fabric -covered surface which has an L-shaped tear, each leg of which is approximatly 14 inches long, is to |
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Definition
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sew with a baseball stitch from the center of the tear out toward the extremity of each leg and dope on a patch.
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Term
| The strength classification of fabrics used in aircraft covering is based on |
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Definition
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Term
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Definition
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Term
| Fabric rejuvenator is used to |
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Definition
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restore the condition of dope coatings.
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Term
(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. |
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Definition
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Term
| 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 |
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Definition
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70 percent of the original strength for intermediate fabric
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Term
| 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 |
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Definition
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Aluminum foil, Cellulose tape
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Term
| If registration numbers are to be applied to an aircraft with a letter hieght of 12 inches, what is the minimum space required for the registration mark N1683C |
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Definition
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Term
| If masking tape is applied to an aircraft such as for trim spraying, and is left on for several days or exposed to heat, it is likely that the tape will |
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Definition
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cure to the finish and be difficult to remove
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Term
| What is used to slow the drying time of some finishes and to prevent blush |
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Definition
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Term
| Which type of coating typically includes phosphoric acid as one of its components at the time of application |
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Definition
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Term
| Which properly applied finish topcoat is the most durable and chemical resistant |
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Definition
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Term
| Aluminum-pigment in dope is used primarily to |
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Definition
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reflect ultraviolent from the fabric
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Term
| A correct use for acetone is to |
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Definition
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remove grease from fabric
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Term
| Which of the following is a hazard associated with sanding on fabric covered surfaces during the finishing process? |
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Definition
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Static electricity buildup
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Term
| What is likely to occur if un hydrated wash primer is applied to unpainted aluminum and then about 30 to 40 minutes later a finish topcoat, when is the humidity is low |
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Definition
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A glossy, blush free finish
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Term
| What is the usual cause of runs and sags in aircraft finishes? |
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Definition
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Too much material applied in one coat
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Term
| Which defect in aircraft finishes may be cleaned by adverse humidity, drafts, or sudden changes in temperature. |
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Definition
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Term
| Which statement is true regarding paint system compatibility? |
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Definition
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Old wash primer coats may be overcoated directly with epoxy finishes.
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Term
| A well-designed rivet joint will subject the rivets to |
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Definition
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Term
| A main difference between Lockbolt/Huckbolt tension and shear fasteners( other than thier application) is in the |
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Definition
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number of locking collar groves.
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Term
| Alloy 2117 rivets are heat treated |
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Definition
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by the manufacturer and do not require to be heat treated before being driven.
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Term
| The general rule for finding proper rivet diameter is |
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Definition
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three times the thickness of the thickest sheet
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Term
| The shop head of a rivet should be |
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Definition
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one and a half times the diameter of the rivet shank
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Term
| One of the main advantages of Hi-Lok type fasteners over earlier generations is that |
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Definition
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they can be installed with ordinary hand tools
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Term
| The markings on the head of a Dzus fastener identify the? |
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Definition
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body diameter, type of head, and length of fastener.
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Term
| The Dzus turnlock fastener consist of a stud grommet, and receptacle. The stud length is measured in |
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Definition
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Term
| The Dzus turnlock fastener consist of a stud , grommet, and recepticle. The stud diameter is measured in |
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Definition
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Term
| Threaded rivets ( rivnuts) are commonly used to |
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Definition
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attach parts or components with screws to sheet metal
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Term
| The installation of Cherrymax and Olympic-Lok rivets is accomplished by utilizing |
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Definition
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Term
| Hole filling fasteners ( for example, MS20470 rivets) should not be used in composite structures primarily because of the |
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Definition
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possibility of causing delamination
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Term
| Metal fasteners used with carbon/ graphite composite structures |
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Definition
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must be constructed of material such as titanium or corrosion resistant steel.
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Term
Sandwich panels made of metal honeycomb construction are used on modern aircraft because this type of construction. |
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Definition
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has a high strength to weight ratio
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Term
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Definition
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