A & P
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | Sitka spruce.
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| Why must abrupt changes in the cross-sectional area of a wooden structural member be avoided? | show 🗑
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| What is the basic difference between laminated wood and plywood? | show 🗑
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| show | Moisture causes the wood to swell and crack as it dries out. It allows fungus to develop in the wood and cause it to decay.
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| show | Yes, but it must be increased in size to compensate for its lower strength.
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| Which wood is more inclined to warp, flat grain or vertical grain? | show 🗑
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| show | Stick a sharp-pointed knife blade in the suspect area and pry the wood up. If the wood is good, it will come up as a long splinter; if it is decayed it will come up as a chunk.
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| Are mineral streaks in a piece of structural aircraft wood reason for rejecting the wood? | show 🗑
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| show | It has a high specific gravity, it appears to have an excessive growth of summerwood, and little contrast between springwood and summerwood.
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| show | No, 3/8 -inch diameter is the maximum allowable knot, and it must meet severe restrictions.
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| show | Yes, if they cause only a small effect on grain direction.
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| show | Synthetic resin or resorcinol glue.
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| What reference material may be used for acceptable repairs to wood aircraft structure? | show 🗑
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| show | Solid spruce or birch plywood reinforcing plates are glued to each side of the spar, centered at each end of the scarf.
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| What is the correct repair to a wooden aircraft wing spar if the wing-attach bolt holes in the spar are elongated? | show 🗑
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| What is the minimum taper to use when repairing a wood wing rib cap strip? | show 🗑
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| show | Soak the wood in hot water until it is pliable.
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| show | Cabinetmakers’parallel clamps.
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| How much pressure must be applied to a glue joint in a piece of softwood to produce a strong joint? | show 🗑
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| show | A scarf patch.
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| show | 5to 1.
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| What is the recommended taper for a scarf patch in a plywood aircraft skin? | show 🗑
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| show | The dust caused by sanding will plug the pores of the wood so the glue cannot get in to form a good bond.
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| show | 1-inch in diameter.
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| Why are light steel bushings often used in bolt holes in a wood wing spar? | show 🗑
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| show | For at least 7 hours.
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| Which area of a wood wing spar must not contain any splice? | show 🗑
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| show | Rem forcing plates are glued to both sides of the splice.
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| show | AC 43. 13-lB. Chapter 2.
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| What are three types of fabric that can be used to cover an aircraft? | show 🗑
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| show | The covering must be done according to a Supplemental Type Certificate, and a Form 337 must be executed, stating that all materials and processes complied with the requirements of the STC.
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| show | Waxed linen cord.
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| What is meant by the selvage edge of a piece of fabric? | show 🗑
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| show | Dope proofing keeps the fabric from sticking to the structure when the first coat of dope is applied. The fabric normally sags enough to touch the structure before it begins to pull taut.
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| show | Cotton reinforcing tape.
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| What is the preferred seam used for machine-sewing pieces of aircraft fabric together? | show 🗑
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| Should a sewed seam in the fabric used to cover an aircraft wing run spanwise or chórdwise? | show 🗑
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| What are two methods of applying the fabric to the wing of an airplane? | show 🗑
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| What material is used to cover the overlapping edges of the leading edge metal to protect the fabric? | show 🗑
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| show | By sewing and with a cement.
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| show | Wet the cotton with water and allow it to dry.
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| How is polyester fabric shrunk on the aircraft structure? | show 🗑
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| show | A modified seine knot.
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| What determines the spacing of the rib lacing stitches on a fabric-covered aircraft wing? | show 🗑
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| When j the finishing tape applied to a fabric-covered wing when it is being recovered? | show 🗑
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| What is an antitear strip, and when are they required on a fabric-covered aircraft? | show 🗑
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| When are drainage grommets applied when an aircraft is being re-covered? | show 🗑
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| Where are drainage grommets located on a fabric-covered aircraft wing? | show 🗑
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| show | The first coat of dope used on cotton and linen fabric has a mildewcide mixed in it.
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| How wide should the surface tape be that is used to cover the trailing edge of an aircraft wing? | show 🗑
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| Why is the surface tape used on the trailing edge of control surfaces of some airplanes notched? | show 🗑
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| What is the purpose otthe reinforcing tape used between the fabric and the rib lacing on an aircraft wing? | show 🗑
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| show | Fabric can deteriorate to 70% of the strength of the fabric required for the aircraft.
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| show | An approximate strength test can be made with an FAA-approved fabric punch tester, but the only way to know for sure that the fabric has sufficient strength is by pulltesting a one-inch-wide sample of the fabric.
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| show | If the never-exceed speed of the aircraft is less than 150 miles per hour, a doped-on repair can be made.
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| show | A baseball stitch, locked every eight to ten stitches.
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| Where are the registration marks required to be placed on a fixed-wing aircraft? | show 🗑
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| What is the generally required dimensions of the registration numbers on the side of a fixed-wing aircraft? | show 🗑
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| What is the regulation regarding the color of the registration marks? | show 🗑
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| Why should wooden wing spars be finished with a transparent varnish? | show 🗑
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| Why is retarder used in dope when the dope is being sprayed in humid conditions? | show 🗑
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| When an aircraft is being recovered, when is fungicidal dope applied to the fabric? | show 🗑
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| show | The thinner in the dope will penetrate the enamel surface and cause it to swelL
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| What are the two basic types of dope used on fabric-covered aircraft? | show 🗑
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| show | Nontautening butyrate dope.
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| show | Dope proofing keeps the fabric from sticking to the structure when the first coat of dope is applied. The fabric normally sags enough to touch the structure before it begins to pull taut.
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| show | Blushing is a condition in dope finished in which moisture from the atmosphere condenses on the surface and causes some of the cellulose to precipitate from the finish. Blushing leaves a porous, dull, and weak finish.Blushing may be caused by the temper
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| show | Spray a very light mist coat of a mixture of one part retarder to two parts of thinner over the blushed area. Allow it to dry and spray on another coat. If this does not remove the blush, the blushed dope will have to be sanded off and new dope applied.
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| What is a rejuvenator? | show 🗑
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| Does rejuvenator restore strength to the fabric? | show 🗑
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| show | To ensure thorough penetration and encapsulation of all of the fibers.
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| show | Too much dope is being applied. The film is too thick..
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| What is the most common cause for dope roping? | show 🗑
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| What causes pinholes in a dope finish? | show 🗑
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| show | To ensure thorough penetration and encapsulation of all of the fibers.
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| show | To protect the clear dope and the fabric from the harmful effects of the sun.
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| show | The floor must be wet down with water before it is swept. Static electricity from drysweeping can cause a fire.
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| Why should a fabric-covered surface be electrically grounded when dry-sanding it? . . | show 🗑
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| show | The instructions that are a part of the STC.
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| What finishing materials must be used when recovering an aircraft using an STC?. | show 🗑
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| show | It should be thin enough, that it does not hide the surface of the metaL
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| show | The converter should always be added to the resin, never the resin to the converter.
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| show | ZInc chromate primer, wash primer, and epoxy primer.
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| What type of thinner is used with zinc chromate primer? | show 🗑
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| show | Epoxy primer.
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| show | The surface should be treated with a chemical conversion coating before the topcoats are applied.
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| show | Be sure that the primer is properly and completely cured.
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| show | The finish must be sanded off Paint remover can soften the resin of which the component is made.
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| show | Place a cloth saturated with cyclohexanone or MEK over the decal until it is softened, and scrape it off of the surface with a plastic scraper.
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| What is a cause of poor adhesion between the topcoat and the fill coats on a fabric surface? | show 🗑
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| What is a cause of a rough finish on a freshly sprayed surface? | show 🗑
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| show | Too much finishing material being applied in one coat.
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| What causes orange peel, or spray mottle, in a finish? | show 🗑
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| What causes pinholes in a finish? | show 🗑
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| What causes blushing in a dope finish? | show 🗑
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| show | Localized surface contamination.
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| For maximum strength of a formed sheet metal fitting, should the bend be made along or across the grain of the metal? | show 🗑
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| What determines the minimum bend radius that can be used when forming a sheet metal structural fitting? | show 🗑
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| What is meant by the neutral axis in a sheet of metal? | show 🗑
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| show | An extension of the flat sides beyond the radius.
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| show | A line in a flat pattern layout at which the bend starts.
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| show | The distance the jaws of a brake must be set back from the mold ilne to form a bend.
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| show | The actual amount of metal in a bend. It is the distance between the bend tangent lines in a flat pattern layout.
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| show | A line drawn on a flat pattern layout within the bend allowance that is one bend radius from the bend tangent line. When the sight line is directly below the nose of the radius bar on the brake, the bend will start at the bend tangent ilne.
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| What type of device is a Cleco fastener? | show 🗑
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| show | Throatless shears are used to cut mild carbon steel up to 10-gage, and stainless steel up to 12-gage. They can be used to cut irregular curves in the metaL
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| What kind of metal forming is done by a slip roll former? | show 🗑
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| show | Compound curves in sheet metaL
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| show | The flanges must be stretched for a convex curve and shrunk for a concave curve.
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| show | Start at the edges and work toward the center.
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| What is meant by a joggle in a piece of sheet metal? | show 🗑
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| show | Two times the diameter of the rivet shank.
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| show | Three-fourths of the distance between the rivets in the rows.
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| Why should aluminum alloy rivets be driven with as few blows as is practical? | show 🗑
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| show | The thickness of the sheet. Countersinking should be done only when the thickness of the sheet is greater than the thickness of the rivet head.
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| show | 7075-T6, 2024-T81 aluminum alloys, and magnesium alloys should be hot-dimpled.
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| show | Coat the faying surface with a corrosion-inhibiting primer, dip the rivets in the primer and drive them while the primer is wet.
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| show | A stringer in the lower surface.
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| What type of rivet may be used to replace a round head rivet in an aircraft structure? | show 🗑
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| show | The combined thickness of the metal sheets plus 1-1/2 times the rivet shank diameter.
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| Should a riveted joint fail in shear or in bearing? | show 🗑
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| show | It holds the rivet set in the gun and allows the gun to vibrate the set.
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| show | By the use Of radiographic inspection.
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| What effect can entrapped moisture have on metal honeycomb structure? | show 🗑
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| show | Tap the surface with the edge of a coin. If the material is sound, the tapping will result in a clear ringing sound; but if it is delaminated, the sound will be a dull thud.
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| show | Ultrasonic inspection.
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| What kind of repair can be made to a small damage of the core material and one face sheet of a piece of aluminum alloy honeycomb structure? | show 🗑
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| What special precautions must be taken when repairing a radome? | show 🗑
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| How do you grind the point of a twist drill that is to be used for drilling transparent acrylic material? | show 🗑
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| show | An alignment indicator to show the orientation of the piles of a composite materiaL The ply direction is shown in relation to a reference direction.
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| What are two advantages of laminated construction over riveted sheet metal? | show 🗑
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| show | Foam and honeycomb.
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| What are two popular types of matrix material used in laminated structure? | show 🗑
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| show | Resin and catalyst
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| show | Resin and hardener.
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| show | Thermoplastic and the rmosetting.
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| What is necessary to cure a thermosetting resin? | show 🗑
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| show | Fiberglass, Kevlar@, and graphite.
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| What is meant by a unidirectional fabric? | show 🗑
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| What is meant by the ribbon direction of a honeycomb material? | show 🗑
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| What are two types of repair to a damaged honeycomb core composite material? | show 🗑
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| What is meant by the shelf life of a material? | show 🗑
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| What is meant by the pot life of a resin? | show 🗑
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| What document lists the safety hazards associated with a resin used in composite structure? | show 🗑
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| Of what class of resins are aircraft windows and windshields made? | show 🗑
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| What type of transparent plastic material is used for most aircraft windshields? | show 🗑
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| show | Leave the protective paper on the material and store it tilted approximately 1O° frOm the vertical.
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| How tight should the screws be tightened when installing an acrylic windshield in a channel? | show 🗑
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| What is meant by crazing of a transparent plastic material? | show 🗑
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| show | Micro-Mesh abrasive sheets.
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| What are the two fuel gases most generally used for gas welding? | show 🗑
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| What fuel gases are used for welding aluminum? | show 🗑
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| show | Balanced-pressure torches and injector torches.
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| show | Green or brown.
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| What color lenses are used for gas welding aluminum? | show 🗑
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| Why is it important that the pressure of the gas in an acetylene cylinder be kept low? | show 🗑
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| What determines the amount of heat that is put into a weld by an oxy-acetylene torch? | show 🗑
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| show | An oxidizing flame has a pointed inner cone, and the torch makes a hisshg noise. A neutral flame has a rounded inner cone, and there is no feather around the inner cone. A reducing flame has a definite feather around the inner cone.
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| show | Skip welding minimizes distortion. Tack weld the materials together and then complete the welds between the tacks, starting. at a tack And working back toward the finished weld.
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| What is meant by tack welding? | show 🗑
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| Why must thick plates of metal be preheated before they are welded? | show 🗑
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| What must be done to an aircraft structure after it has been welded while clamped in a heavy jig or fixture? | show 🗑
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| show |
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| show | In brazhg, the base metal is not melted, but is covered with.a low-melting-point alloy. In welding, the base metal is melted.
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| show | A soft, neutral oxy-hydrogen flame.
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| What is an acceptable acetylene line pressure to use when welding with an oxyacetylene rig? | show 🗑
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| show | A slightly carburizing flame.
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| How much should the bead penetrate the material when welding two pieces of steel with a butt weld? | show 🗑
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| show | A soft flame is one that is made when the pressures of the gases are low enough that the flame does not make a noise and does not blow the puddle.
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| show | The gasoline fumes must all be purged from the tank by running live steam through it for at least 30 minutes, by soaking it in hot water, or by filling it with nitrogen or carbon dioxide.
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| What is another name for GTA welding? | show 🗑
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| show | Helium and argon.
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| Why is GTA welding preferred over oxy-acetylene welding for building and repairing welded steel tube aircraft structure? | show 🗑
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| What is the function of the inert gas used in GTA and GMA welding? | show 🗑
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| show | A small-diameter tungsten wire.
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| What are three types of power that can be used for GTA welding? | show 🗑
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| Which type of power provides the greatest heat and deepest penetration in GTA welding? | show 🗑
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| show | DC-reverse polarity.
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| show | A patch may be welded over the damage.
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| show | A patch may be welded over the damaged area with fingers extending up along each member of the cluster.
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| What is the preferred method of splicing a new piece of tubing into a structure? | show 🗑
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| How is the inner ‘sleeve tube held in the structural tube until the gap is welded? | show 🗑
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| What is one limitation of using an outer-sleeve splice in an aircraft structure? | show 🗑
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| How should the ends of an outer-sleeve be cut? | show 🗑
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| What is the function of the flux used in soldering? | show 🗑
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| show | 60/40 resin-core solder.
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| show | 60% tin and 40% lead.
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| show | Soldering is a method of joining metal parts with a molten nonferrous alloy that melts at a temperature below 800 °F Brazing is essentially the same except the brazing alloy melts at a temperature higher than 800 °F but lower than the melting temperature
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| Why must acid-core solder never be used on electrical wire? | show 🗑
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| show | The mechanical connection of the joint, not the solder.
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| show | Ailerons rotate the airplane about its Ion gitudinal axis.
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| What is a stabilator? | show 🗑
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| What is the function of the elevators on an airplane? | show 🗑
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| show | The rudder rotates the airplane about its vertical axis.
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| show | It ties the ailerons together in such a way that when one aileron deflects downward the other one is pulled upward.
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| show | A surface with part of its area ahead of the hinge line. When the surface is deflected, the portion ahead of the hinge aids the movement.
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| show | Aileron movement in which the upward-moving aileron deflects a greater distance than the one moving downward. The up aileron produces parasite drag to counteract the induced drag produced by the down aileron.
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| show | An aileron with its hinge line set back from the leading edge so that when it is deflected upward, part of the leadmg edge projects below the wing and produces parasite drag to help overcome adverse yaw.
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| What is a ruddervator? | show 🗑
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| How much is a fairlead allowed to deflect a control cable? | show 🗑
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| Why are the control cables of large airplanes normally equipped with automatic tension regulators? | show 🗑
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| In what publication could you find correct control surface movement for a particular airplane? | show 🗑
|
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| show | The forward speed of the helicopter produces dissymmetry of lift The rotor blade that is traveling forward as the helicopter is flying produces more lift than the blade that is traveling rearward.
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| show | The thrust from the tall rotor counteracts the torque produced by the main rotor.
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| Why is it important that the blades of a helicopter rotor system be in track? | show 🗑
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| What is the function of the collective pitch control of a helicopter? | show 🗑
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| What is the function of the cyclic pitch control? | show 🗑
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| What is the function of the tail rotor on a single main rotor helicopter? | show 🗑
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| What is the purpose of the stabilizer system in a helicopter? | show 🗑
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| What is meant by a fully articulated rotor system? | show 🗑
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| What is meant by a semirigid rotor system? | show 🗑
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| show | A rotor system that has freedom of motion about its feather axis only. The flexibility of the blades is sufficient to provide the needed flapping and dragging.
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|
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| What is the basic cause of low-frequency lateral vibration? | show 🗑
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| What is the basic cause of low-frequency vertical vibration? | show 🗑
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| show | The engine, cooling fan, or tail rotor.
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|
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| What is the most effective way to check a helicopter rotor for dynamic balance? | show 🗑
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| show | An out-of-balance control surface can cause severe flutter.
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|
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| Where can you find the specifications for balancing the control surfaces of an airplane? | show 🗑
|
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| show | Worn hinges or improperly adjusted control cable tension.
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|
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| Where can you find instructions for jacking one wheel of an aircraft to change a tire? | show 🗑
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| show | In the aircraft maintenance manuaL
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| Where can you find instructions for hoisting an aircraft to replace wheels with floats? | show 🗑
|
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| What must the mechanic give the owner or operator of an aircraft if the aircraft he is giving a 100-hour inspection to proves to be unairworthy? | show 🗑
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| show | In 14CFR43.11.
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| show | The aircraft can be operated for no more than 10 hours after an inspection is due for the purpose of flying it to a place where the inspection can be performed.
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| For how long can an aircraft be operated if a 100-hour inspection is overdue? | show 🗑
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| show | It can only be flown when a special flight permit is issued.
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| What certification is required for a mechanic to be able to approve an aircraft for return to service after a 100-hour inspection? | show 🗑
|
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| show | Aircraft that carry persons for hire and aircraft that are used for flight instruction for hire must be given 100-hour inspections.
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|
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| What is the difference between an annual inspection and a 100-hour inspection? | show 🗑
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| What certification is required for a mechanic to conduct an annual inspection and approve the aircraft for return to service after the inspection? | show 🗑
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| What is a progressive inspection? | show 🗑
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| show | Yes, according to 14 CFR S43. 15(c)(1).
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| show | A mechanic certificate with an Airframe and Powerplant ratings and an Inspection Authorization.
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| show | In 14 CFR Part 43, Appendix E.
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|
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| Where can you find the requirements for inspecting the ATC transponder that is installed in an aircraft? | show 🗑
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| What items must be inspected on a helicopter in accordance with the instructions for Continued Airworthiness? | show 🗑
|
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| Must all manufacturer’s service letters, instructions, and bulletins be complied with on an annual or 100-hour inspection? | show 🗑
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| For how long must the record of a 100-hour inspection be retained in the aircraft maintenance records? | show 🗑
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| For how long must the record of the current status of life-limited parts of an engine be retained? | show 🗑
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| Where may the instructions for greasing a retractable landing gear on an aircraft be found? | show 🗑
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| show | In the aircraft maintenance manual.
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| show | In the aircraft maintenance manual.
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| show | The centering cam forces the nose wheel straight back with the strut before it is retracted into the nose-wheel well.
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| How does a shimmy damper keep a nose wheel from shimmying? | show 🗑
|
||||
| show | On the nameplate on the strut.
🗑
|
||||
| show | The transfer of oil from one compartment to another through a metered orifice.
🗑
|
||||
| What absorbs the taxi shocks in an oleo shock strut? | show 🗑
|
||||
| show | With the strut completely deflated, fill it to the level of the filler plug.
🗑
|
||||
| show | With the strut serviced with fluid and the filler plug in place and the weight of the aircraft on the strut, put in enough air or nitrogen to extend the piston to the height specified in the aircraft maintenance manuaL
🗑
|
||||
| show | The jack moves the piston up and down inside the cyllnder to work all of the air out of the oil to be sure that the proper amount of oil is in the strut.
🗑
|
||||
| show | In the aircraft service manuaL
🗑
|
||||
| show | Alcohol.
🗑
|
||||
| What is used to flush brake lines and cylinders if the system uses mineral-base fluid? | show 🗑
|
||||
| show | Measure the clearance between the disk and the inboard side of the brake housing with the brakes applied.
🗑
|
||||
| show | The debóoster decreases the pressure and increases the volume of fluid going to the brakes. This gives the pilot better control of the brakes.
🗑
|
||||
| What Should be done to hydraulic brakes when the pedal has a spongy feel? | show 🗑
|
||||
| What is the purpose of the compensator port in the master cylinder of aircraft brakes? | show 🗑
|
||||
| show | The shuttle valve is an automatic transfer valve. It allows the brakes to be operated by hydraulic system pressure under all normal conditions; but if this pressure is lost, it allows the brakes to be operated by the emergency backup system.
🗑
|
||||
| How does an antiskid brake system keep the wheels of an aircraft from skidding on a wet runway? | show 🗑
|
||||
| show | After the aircraft is on the jacks, but before the axle nut is loosened.
🗑
|
||||
| What should be used to deflate high-pressure tires? | show 🗑
|
||||
| What is used in a split wheel to keep air from leaking between the two wheel halves? | show 🗑
|
||||
| Where are cracks most likely to form in an aircraft wheel? | show 🗑
|
||||
| What type of inspection should be used to inspect the bead seat area of a wheel for cracks? | show 🗑
|
||||
| show | The number of plies of cotton fabric needed to produce the same strength as the actual plies in the tire.
🗑
|
||||
| show | The bead is made of high-strength carbon steel wire bundles and used to provid thqstrength and stiffness where the tire mounts on the wheeL
🗑
|
||||
| show | No, the inner ilner of a tubeless tire is rough and it can chafe the tube in normal operation.
🗑
|
||||
| show | The grooves produce the optimum traction with the runway surface.
🗑
|
||||
| What is the most widely used tread pattern for modern airplane tires? | show 🗑
|
||||
| show | In a dark, cool location away from electrical motors or battery chargers.
🗑
|
||||
| show | Vertically.
🗑
|
||||
| What is the most important maintenance procedure for aircraft tires? | show 🗑
|
||||
| What should be used to remove oil from a tire? | show 🗑
|
||||
| show | In the aircraft service manual.
🗑
|
||||
| Why should aircraft tire pressure be rechecked after it has been installed for about 24 hours with no load applied? | show 🗑
|
||||
| show | Operating the tire in an underinflated condition.
🗑
|
||||
| show | Operating the tire in an overinflated condition.
🗑
|
||||
| show | The tire should be scrapped.
🗑
|
||||
| show | It is possible in some aircraft that a new or retreaded tire can be different enough in size from the previous tire that it could lock up in the wheel well when the landing gear is retracted.
🗑
|
||||
| show | Put the wheel in a safety cage when it is being inflated because of the danger if the through bolts should fail.
🗑
|
||||
| What should be done with a tire that was on a wheel which was overheated enough to melt the fusible plug in the wheel? | show 🗑
|
||||
| Where can you find the correct inflation pressure for the tires on an aircraft? | show 🗑
|
||||
| show | A filter with a special paper element.
🗑
|
||||
| What is a double-action pump? | show 🗑
|
||||
| Why do most engine-driven hydraulic pumps have a shear section in their drive couplings? | show 🗑
|
||||
| What does an unloading valve do in a hydraulic system? | show 🗑
|
||||
| show | The accumulator holds pressure on the hydraulic fluid in the system. The pressure isheld by compressed air or nitrogen acting on the fluid through a bladder, a diaphragm,or a piston.
🗑
|
||||
| show | An orifice check valve allows full flow of fluid in one direction through the valve, but restricts the flow in the opposite direction.
🗑
|
||||
| Where are line-disconnect fittings normally located in an aircraft hydraulic system? | show 🗑
|
||||
| show | A linear actuating cylinder that uses hydraulic fluid under pressure to move the piston in only one direction. The piston is returned by a spring.
🗑
|
||||
| What is a sintered metal hydraulic filter? | show 🗑
|
||||
| show | It indicates when the filter is clogged and fluid is bypassing the filter element.
🗑
|
||||
| show | An edge filter made of a stack of thin metal disks separated by thin scraper blades. Contaminants collect on the edge of the disks and are periodically scraped out by rotating the disks. The contaminants collect Th the bottom of the filter case for future
🗑
|
||||
| show | A one-way seal.
🗑
|
||||
| To which side of a chevron seal should the pressure be applied? | show 🗑
|
||||
| show | A two-way seal.
🗑
|
||||
| show | The 0-ring must have the correct part number and it must have been obtained from a reputable source.
🗑
|
||||
| show | On the side away from the source of pressure.
🗑
|
||||
| What should be done to the sharp edges of threads and actuator pistons when installing 0-rings? | show 🗑
|
||||
| What are two basic differences between a hydraulic and a pneumatic system? | show 🗑
|
||||
| What are two functions of a low-pressure pneumatic system in an aircraft? | show 🗑
|
||||
| What type of pump is used in a low-pressure pneumatic system? | show 🗑
|
||||
| show | At high altitude there is not enough air mass to drive the gyros at their required speed.
🗑
|
||||
| What effect would a dirty inline air filter have on the operation of pneumatic gyro instruments? | show 🗑
|
||||
| show | Carbon.
🗑
|
||||
| show | A variable orifice.
🗑
|
||||
| show | The separator collects moisture from the air and holds it on a baffle until the system is shut dOwn. When the inlet pressure to the moisture separator drops below 450 ps4 a drain valve opens and all of the accumulated moisture is discharged overboard. A m
🗑
|
||||
| What are two types of filters that are used in an aircraft pneumatic system? | show 🗑
|
||||
| show | Mineral base fluid and phosphate ester base fluid.
🗑
|
||||
| Does the main hydraulic pump take its fluid from the bottom of the reservoir, or from a standpipe? | show 🗑
|
||||
| show | Pressurization ensures that fluid will be supplied to the inlet of the pumps at high altitude where there is not enough atmospheric pressure to do this.
🗑
|
||||
| What are two ways aircraft hydraulic reservoirs may be pressurized? | show 🗑
|
||||
| show | Trichlorethylene or the solvent recommended by the aircraft manufacturer.
🗑
|
||||
| What is used to flush a hydraulic system that uses mineral base hydraulic fluid? | show 🗑
|
||||
| Where can you find the type of hydraulic fluid required for a particular aircraft? | show 🗑
|
||||
| What is used to remove phosphate-ester base hydraulic fluid from aircraft tires? | show 🗑
|
||||
| How can you be sure that a replacement seal in a hydraulic component is compatible with the fluid used in the system? | show 🗑
|
||||
| What must be done to the lines that are disconnected when replacing an aircraft hydraulic system component? | show 🗑
|
||||
| show | All of the pressure must be bled off
🗑
|
||||
| Where does the warm air come from that is used to heat the cabin of most small single-engine reciprocating-engine-powered aircraft? | show 🗑
|
||||
| show | Exhaust gases contain carbon monoxide (CO), a colorless, odorless, gas that can cause incapacitation or death to the aircraft occupants.
🗑
|
||||
| show | Pressurize it with the discharge from a vacuum cleaner and wipe the outside of the system with a soap solution. Any leak will cause bubbles to form.
🗑
|
||||
| How can you tell that there is carbon monoxide in the aircraft cabin? | show 🗑
|
||||
| Where does the fuel used in an aircraft combustion heater come from? | show 🗑
|
||||
| What happens to a combustion heater if the flow of ventilating air is restricted? | show 🗑
|
||||
| show | A thermostat senses the cabin temperature and cycles the fuel valve on or off to maintain the temperature at the desired value.
🗑
|
||||
| show | Clean the fuel filters and check for fuel leaks.
🗑
|
||||
| What are two types of air conditioning systems that may be installed on an aircraft? | show 🗑
|
||||
| How is the heat removed from an aircraft cabin with a vapor-cycle air conditioning system? | show 🗑
|
||||
| What produces the cool air in a vapor-cycle air conditioning system? | show 🗑
|
||||
| What is used as the refrigerant in a vapor-cycle air conditioning system? | show 🗑
|
||||
| What is the state of the refrigerant as it leaves the compressor? | show 🗑
|
||||
| show | It is a high-pressure liquid.
🗑
|
||||
| What is the state of the refrigerant as it leaves the thermostatic expansion valve? | show 🗑
|
||||
| What is the state of the refrigerant as it leaves the evaporator? | show 🗑
|
||||
| show | Refrigeration oil is mixed with the refrigerant and it circulates through the compressor and the entire system.
🗑
|
||||
| What is the function of the thermostatic expansion valve? | show 🗑
|
||||
| How is refrigerant put into the system? | show 🗑
|
||||
| How should the components in the low side of a properly operating vapor-cycle cooling system feel? | show 🗑
|
||||
| How is a vapor-cycle cooling system checked for refrigerant leaks? | show 🗑
|
||||
| What safety equipment should be worn when charging a vapor-cycle cooling system? | show 🗑
|
||||
| show | Warm engine compressor bleed air is used.
🗑
|
||||
| Where is the first place the hot compressor bleed air gives up some of its heat in an air-cycle cooling system? | show 🗑
|
||||
| show | The centrifugal compressor increases the pressure and temperature of the bleed air. This high temperature air gives up some of its heat in the secondary heat exchanger, and a great deal more as it drives the expansion turbine. It leaves the expansion turb
🗑
|
||||
| Why must air-cycle air conditioning systems incorporate a water separator? | show 🗑
|
||||
| show | By a temperature control valve which mixes hot engine compressor bleed air with cold air from the expansion turbine.
🗑
|
||||
| Why are the cabins of most turbine-powered aircraft pressurized? | show 🗑
|
||||
| show | From air bled from one of the enghe compressors.
🗑
|
||||
| Where does the pressurizing air come from on most smaller reciprocating- engine-powered aircraft? | show 🗑
|
||||
| show | The structural strength of the aircraft cabin.
🗑
|
||||
| How is cabin pressure controlled in a pressurized aircraft? | show 🗑
|
||||
| What is meant by the isobaric mode of cabin pressurization? | show 🗑
|
||||
| show | After the pressure in the aircraft cabin reaches the maximum value allowed by structural considerations, the constant differential mode of operation holds the pressure inside the cabin a constant amount above the outside air pressure.
🗑
|
||||
| show | The cabin outflow valve, which is controlled by the pressure controller, maintains the correct amount of pressure inside the cabin.
🗑
|
||||
| What is the function of the cabin pressure safety valve on a pressurized aircraft? | show 🗑
|
||||
| show | The structure of an aircraft cabin is not designed to tolerate the inside pressure being lower than the outside pressure.
🗑
|
||||
| What keeps the cabin of a pressurized aircraft from being pressurized when the aircraft is on the ground? | show 🗑
|
||||
| What are the two main gases that make up our atmosphere? | show 🗑
|
||||
| show | A special leak-detector liquid that is a form of non-oily soap.
🗑
|
||||
| Why must fittings in an oxygen system not be tightened to stop a leak when there is pressure on the system? | show 🗑
|
||||
| show | As a high-pressure gas, in its liquid form, and as a solid in the form of a chemical candle.
🗑
|
||||
| show | Only aviators’ breathing oxygen. Hospital oxygen and welding oxygen contain too much moisture to be used.
🗑
|
||||
| show | An oxygen system that continuously flows a metered amount of oxygen into the mask.
🗑
|
||||
| show | An oxygen system that flows oxygen to the mask only when the wearer of the mask inhales. Above a specified altitude, the regulator meters oxygen under pressure into the mask when the wearer inhales.
🗑
|
||||
| show | The identification DOT 3AA or DOT 3H7 the date of manufacture,, and the date of all of the hydrostatic tests.
🗑
|
||||
| To what pressure, and how often should DOT 3AA oxygen cylinders be hydrostatically tested? | show 🗑
|
||||
| To what pressure, and how often should DOT 3HT oxygen cylinders be hydrostatically tested, and when should they be retired from service? | show 🗑
|
||||
| show | Teflon tape or a special water-base lubricant.
🗑
|
||||
| What is used to check for leaks after replacing a fitting in an oxygen system? | show 🗑
|
||||
| What cleaning solutions can be used to clean parts used in an oxygen system? | show 🗑
|
||||
| What may be used to dry components in an oxygen system after they have been cleaned? | show 🗑
|
||||
| show | Water-pumped dry nitrogen.
🗑
|
||||
| show | The oxygen supply must be turned off at the bottle valve.
🗑
|
||||
| show | Deviation error.
🗑
|
||||
| show | A special water-clear fluid similar to kerosine.
🗑
|
||||
| What is the maximum amount of deviation error allowed when a magnetic compass is installed in an aircraft? | show 🗑
|
||||
| show | At a location where there is little traffic and the area is free from magnetic interference caused by electrical power lines or buried pipes.
🗑
|
||||
| What is done to a compass to correct for deviation error? | show 🗑
|
||||
| Where should the compass correction card be placed? | show 🗑
|
||||
| show | Heading indicator, attitude Thdicator, and turn-and-slip Thdicator.
🗑
|
||||
| What device is used with a wet-pump vacuum system to prevent oil from getting into the deicer boots? | show 🗑
|
||||
| show | A pump inlet filter and an inlThe filter.
🗑
|
||||
| What type of filter is used with a vacuum system for gyros? | show 🗑
|
||||
| show | A dry-type and a wet-type air pump.
🗑
|
||||
| What are the vanes of a wet-type air pump made of? | show 🗑
|
||||
| What are the vanes of a dry-type air pump made of? | show 🗑
|
||||
| How are the vanes of a wet-type air pump lubricated? | show 🗑
|
||||
| show | The gasket must have a hole through which the pump lubricating oil can flow
🗑
|
||||
| show | The special carbon material of which the vanes are made wears away in microscopic amounts to provide the needed lubrication.
🗑
|
||||
| What must be done to the gyro pressure system if a dry-type air pump fails? | show 🗑
|
||||
| show | The manufacturer of the aircraft on which the tests are conducted, or a certificated repair station properly equipped and authorized to perform the test.
🗑
|
||||
| show | 14 CFR Part 43, Appendix E.
🗑
|
||||
| show | Every 24 calendar months.
🗑
|
||||
| What are 6 tests that must be made when testing an altimeter? | show 🗑
|
||||
| show | 125 feet.
🗑
|
||||
| show | To the highest altitude the aircraft will be flown on IFR flight.
🗑
|
||||
| show | The aircraft permanent maintenance record must show the date, the maximum altitude to which the altimeter was tested, and the name of the person approving the aircraft for return to service after the test.
🗑
|
||||
| show | No, only those operated under instrument flight rules in controlled airspace.
🗑
|
||||
| To what avionic equipment is the output from an encoding altimeter connected? | show 🗑
|
||||
| What is the allowable difference between the surveyed elevation of the airport and the indication on the altimeter when it is set to the local altimeter setting? | show 🗑
|
||||
| show | The airspeed indicator, vertical speed indicator, and altimeter.
🗑
|
||||
| show | A certificated mechanic holding an airframe rating.
🗑
|
||||
| show | With a pressure differential of 1 inch of mercury, the system must not show a loss of indicated altitude of more than 100 feet in one minute.
🗑
|
||||
| show | With a pressure differential equal to the maximum cabin differential pressure for which the aircraft is certificated, the system must not show a loss of indicated altitude of more than 2 percent of the equivalent altitude of the maximum cabin differential
🗑
|
||||
| show | The altimeter will show an increase of approximately 1,000 feet.
🗑
|
||||
| When should a static system leak check be performed? | show 🗑
|
||||
| show | It should be taped over in such a way that the tape can not be overlooked or forgotten when the test is completed.
🗑
|
||||
| On what two frequencies does the Emergency Locator Transmitter operate? | show 🗑
|
||||
| Where is the ELT transmitter normally located on an aircraft? | show 🗑
|
||||
| How often should ELT batteries be replaced or recharged? | show 🗑
|
||||
| show | By the date marked on the outside of the transmitter.
🗑
|
||||
| show | Every 12 calendar months.
🗑
|
||||
| show | An inertia switch that detects an impact parallel to the longitudinal axis of the aircraft as would occur in a crash.
🗑
|
||||
| How is an ELT tested to determine that it is working? | show 🗑
|
||||
| show | Coaxial cable.
🗑
|
||||
| What is a coaxial cable? | show 🗑
|
||||
| show | Refer to the radio installation instructions for the correct part number for the cable and connectors.
🗑
|
||||
| show | The routing should be as direct as possible, there should be no sharp bends in the coax, and it should be kept away from heat that could soften the insulation.
🗑
|
||||
| What is a BNC connector? | show 🗑
|
||||
| show | On top of the aircraft, along the center line of the fuselage.
🗑
|
||||
| Which component of the Instrument Landing System shares the antenna with the VOR? | show 🗑
|
||||
| What is the preferred location for a DME antenna? | show 🗑
|
||||
| show | A vertically polarized whip antenna.
🗑
|
||||
| show | A UHF stub antenna.
🗑
|
||||
| show | On the center line of the belly of the aircraft as far from any other antenna as ispractical.
🗑
|
||||
| show | A directional loop antenna and a nondirectional sense antenna.
🗑
|
||||
| Why is it necessary to install a doubler on the inside of the aircraft skin when antenna is mounted on the skin? | show 🗑
|
||||
| What is the basic purpose of an autopilot? | show 🗑
|
||||
| show | Command, error-sensing, correction, and follow-up.
🗑
|
||||
| show | Gyros.
🗑
|
||||
| What are three types of servos that are used in the correction subsystem? | show 🗑
|
||||
| show | It stops the control movement when the surface has deflected the proper amount forthe signal sent by the error sensor.
🗑
|
||||
| Is a certificated airframe mechanic allowed to adjust a communications transmitter? | show 🗑
|
||||
| show | The VHF band, between 30 and 300 megahertz.
🗑
|
||||
| show | In the VHF band, between 108.0 and 117.95 megahertz.
🗑
|
||||
| In what frequency band does the DME equipment operate? | show 🗑
|
||||
| show | The high frequency band (2 to 25 megahertz).
🗑
|
||||
| show | It is a piece of radio communications equipment in which all of the circuits for the receiver and the transmitter are contained in one housing.
🗑
|
||||
| show | Tubular capacitors that extend across the fuel tank from top to bottom.
🗑
|
||||
| show | Tubular capacitors extending across the fuel tanks change their capacitance as the fuel level changes. The dielectric constant (k) of the fuel is approximately twice that of air.
🗑
|
||||
| show | A variable resistor with an arm that is moved by a float riding on top of the fuel in the tank.
🗑
|
||||
| What are two types of fuel cells used in modern aircraft? | show 🗑
|
||||
| Why are fuel tanks divided into compartments or have baffles installed in them? | show 🗑
|
||||
| show | The drip gage allows a mechanic to check the fuel level in a tank from the bottom of the tank.
🗑
|
||||
| What markings must appear near the filler opening of the fuel tanks on reciprocating-engine-powered aircraft, and on a turbine-powered aircraft? | show 🗑
|
||||
| Where can you find the correct part number for the fuel quantity sensor to be installed in an aircraft fuel tank? | show 🗑
|
||||
| show | During level flight when the fuel in the tank is equal to the unusable fuel supply.
🗑
|
||||
| Where are fuel system strainers located? | show 🗑
|
||||
| show | Strainers clog because ice forms on the filter element. The flight crew can route the fuel through a fuel heater to melt the ice.
🗑
|
||||
| show | The system must be tested for leaks by pressurizing the system with the boost pump, if one is used.
🗑
|
||||
| Why is it important to drain all of the fuel sumps before the first flight of the day? | show 🗑
|
||||
| Is the procedure of draining the sumps with the aircraft in the ground attitude an assurance that all of the water is removed from the tanks? | show 🗑
|
||||
| How does water appear in the fuel drained from the tank sumps? | show 🗑
|
||||
| show | Blue.
🗑
|
||||
| How can you detect jet fuel in the sample taken from the tank sump drains? | show 🗑
|
||||
| show | The fuel system must be drained and flushed out with the proper grade of aviation gasoilne.
🗑
|
||||
| show | The detent gives the pilot a positive indication by feel when the selector valve is in the full ON and full OFF position.
🗑
|
||||
| What must be done before a fuel selector valve can be removed from an aircraft? | show 🗑
|
||||
| What must be done after a fuel valve is replaced? | show 🗑
|
||||
| How is a fuel leak indicated on a reciprocating-engine-powered aircraft? | show 🗑
|
||||
| show | The high-inrush current caused by the low resistance of the cold filaments requires that the switches be derated.
🗑
|
||||
| show | A single-pole, double-throw switch.
🗑
|
||||
| Where could you find the part number of a switch in an aircraft electrical system? | show 🗑
|
||||
| If no specific instructions are available, which way should the operating handle of an electrical switch move to turn a component on? | show 🗑
|
||||
| show | A circuit breaker that cannot be closed while a fault exists, regardless of the position of the operating handle.
🗑
|
||||
| What is meant by a slow-blow fuse? | show 🗑
|
||||
| show | It protects the wiring from an excess of current. It will open the circuit if enough current flows to heat the wire until the insulation begins to smoke.
🗑
|
||||
| What are two principles upon which circuit breakers operate? | show 🗑
|
||||
| What circuit in an aircraft electrical system is not required to have a circuit protective device? | show 🗑
|
||||
| Is an automatic-reset circuit breaker approved for aircraft electrical circuits? | show 🗑
|
||||
| show | The current carrying capability of the wire and the voltage drop caused by the current flowing through the wire.
🗑
|
||||
| show | Four.
🗑
|
||||
| show | The edges of the hole are covered with a flexible grommet, and the bundle is secured to the structure with a cushioned clamp.
🗑
|
||||
| What kind of clamp is used to secure a wire bundle to the aircraft structure? | show 🗑
|
||||
| Why are solderless splices usually better than soldered splices in the wiring of an aircraft electrical system? | show 🗑
|
||||
| What is the main disadvantage of aluminum wire over copper wire for use in an aircraft electrical system? | show 🗑
|
||||
| show | Two-gage. When you substitute aluminum wire for copper wire, use a wire that is two gage numbers larger.
🗑
|
||||
| show | Six-gage.
🗑
|
||||
| What color insulator on a preinsulated solderless connector indicates that the con nectçr is proper for a 10-gage wire? | show 🗑
|
||||
| What size generator must be used in an aircraft electrical system if the connected electrical load is 30 amps, and there is no way of monitoring the generator output? | show 🗑
|
||||
| What is meant by “flashing” the field of a generator? | show 🗑
|
||||
| What is meant by paralleling the generators in a multi-engine aircraft? | show 🗑
|
||||
| show | Wbrator-type, carbon-pile type, and soild state-type.
🗑
|
||||
| show | When the voltage rises above the desired value, an electromagnetic relay opens and inserts a resistor in the generator field circuit, decreasing the field current and lowering the generator output voltage.
🗑
|
||||
| show | A current limiter and a reverse-current cutout relay.
🗑
|
||||
| show | A landing gear safety switch that energizes a circuit to prevent the landing gear retraction handle from being moved to the RETRACT position when weight is on the landing gear. It is located in the torsion llnks of one of the math landing gears.
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| show | A precision Microswitch.
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| What type of system is used to indicate the position of the wing flaps? | show 🗑
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| What information is shown by the wing flap position indicator? | show 🗑
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| What would cause the warning horn to sound when the throttles are pulled back, reducing the engine power for landing? | show 🗑
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| What is indicated by a red light in the landing gear position-indication portion of the annunciator panel? | show 🗑
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| What information is given to a pilot to indicate that all of the landing gears are down and locked? | show 🗑
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| What is the most likely cause of a landing gear warning system failing to warn when the landing gear is not down and locked? | show 🗑
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| How is ice kept from forming on the pitot tube of an airplane? | show 🗑
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| How can you tell, on a preflight inspection, that the pitot heater is operating? | show 🗑
|
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| show | In the illustrated parts manual for the aircraft.
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| If the pitot head includes ports for the static air system, what must be done after the head is replaced? | show 🗑
|
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| Why is it important that ice not be allowed to build up on airplane wings in’ flight? | show 🗑
|
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| Are pneumatic deicer boots operated before ice forms, or after it has formed? | show 🗑
|
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| show | From the discharge side of the air pump used to operate the gyro instruments.
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|
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| show | It is a vacuum pump that uses engine oil to lubricate its steel vanes. A dry vacuum pump uses carbon vanes, and it does not require any oil for lubrication.
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|
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| What is the purpose of the oil separator in a deicer system? | show 🗑
|
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| show | By washing them with mild soap and water.
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|
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| show | They are bonded to the surface with an adhesive. Boots on the older aircraft were attached with machine screws and Rivnuts.
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|
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| show | The windshield has a heater element embedded in it. Electric current heats the windshield and keeps ice from forming on it.
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|
||||
| What are two ways rain can be kept from obstructing the pilot’s vision through the windshield of an airplane? | show 🗑
|
||||
| When should rain repellent be used on an airplane windshield? | show 🗑
|
||||
| Where can you find the instructions for adjusting the tension for the windshield wiper blades? | show 🗑
|
||||
| What type of fire extinguishing agent is best for both cabin fires and engine fires? | show 🗑
|
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| show | It is corrosive to aluminum and magnesium.
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|
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| Why is carbon tetrachioride not recommended as a fire extinguishing agent? | show 🗑
|
||||
| show | One of the halogenated hydrocarbons, such as Ha/on 1301, pressurized with nitrogen.
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|
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| show | By its weight.
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|
||||
| How can you determine the state of charge of a freon fire extinguisher container? | show 🗑
|
||||
| How does the ambient temperature effect the pressure shown on the pressure gage on a freon fire extinguisher? | show 🗑
|
||||
| What releases the fire extinguishing agent in a high-rate discharge bottle? | show 🗑
|
||||
| What precaution must you observe when checking the electrical squib of an HRD fire extinguisher bottle for electrical continuity? | show 🗑
|
||||
| Does a thermocouple fire detection system warn the pilot of a general overheat condition? | show 🗑
|
||||
| show | No, it actuates only when there is a fire.
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|
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| show | Close the test switch. If the system is continuous and not shorted, the fire-warning fight and bell will actuate.
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|
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| How is a continuous-loop fire detector circuit checked? | show 🗑
|
||||
| show | Yes, it actuates when there is a fire or a general overheat condition.
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|
||||
| How is the pneumatic fire detection system tested? | show 🗑
|
||||
| What happens when the Fire-Pull T-handle is pulled in a jet transport aircraft? | show 🗑
|
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| show | The Bottle Discharge switch must be closed.
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|
||||
| What type of fire extinguisher is recommended for extinguishing a brake fire? | show 🗑
|
||||
| How can you determine whether or not a built-in fire extinguishing system has been discharged? | show 🗑
|
||||
| What is indicated if the red disk in a built-in fire extinguishing system is blown out? | show 🗑
|
||||
| What is indicated if the yellow disk in a built-in fire extinguishing system is blown out? | show 🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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