Flashcards
Materials and Processes - Oral & Practical Projects
Cards in this deck (121)
- 1What are the most common specifications types used in the identification of aircraft hardware?AN, NAS, MSP
- 2What are the three types of fasteners used on aircraft?Bolts, Screws, and Rivets
- 3What are two types of threaded fasteners?Bolts and Screws
- 4What are the differences between bolts and screws?Bolts always has a blunt,
Screw might have a blunt
- 5What are the similarities between bolts and screws?They are both used for fastening or holding and each has a head on one end and screw threads on the other
- 6What are the classifications of threads used on aircraft bolts, screws, and nuts?NC, NF, UNF
- 7What are the four classes of threaded fit for aircraft bolts, screws, and nuts?-Class 1 is a loose fit
-Class 2 is a free fit
-Class 3 is a medium fit
-Class 4 is a close fit - 8What class of fit are the threads of most aircraft bolts?Class 3 medium fit
- 9What class of fit are most aircraft screws?Class 2 thread fit
- 10From what metals are aircraft bolts fabricated?Cadmium-or-Zinc-plated corrosion-resistant steel, un-plated corrosion-resistant steel, or anodiezed-aluminum alloys
- 11What are the three types of most bolts used in aircraft structures?AN bolts, NAS (internal wrenching or close tolerance bolts), or MS bolts
- 12What are the three head styles for AN bolts?Hex head, Clevis, and Eyebolt
- 13What are the three head styles for NAS bolts?Hex head, internal wrenching, and counter sunk head
- 14What are the two head styles for MS bolts?Hex head and Internal wrenching styles
- 15In what types of installations do you use a general purpose, hex-head bolt (AN3 through AN20)?Tension or shear loads where a light drive fit is permissible
- 16What's the smallest diameter AN bolt used primary structures?AN4
- 17What are the restrictions on using aluminum alloy AN bolts?-They are not used where they are repeatedly removed for purposes of maintenance and inspection
-Seaplanes (they are subject to corrosion)
-Can't be subject to vibration - 18What are the metals from which aircraft nuts made?Cadmium-plated carbon steel, stainless steel, or anodized 2024T aluminum alloy, brass
- 19What are non-self-locking nuts?Nuts that must be safe tied by external locking devices, such as cotter pins, safety wire, or locknuts
- 20What are self-locking nuts?They have a safety feature
- 21What is the AN310 castle nut?A nut that is used with drilled shank AN hex head bolts, clevis bolts, eye bolts, drilled head bolts, or stud. It is rugged and can withstand large tensional loads
- 22What is a AN320 castellated shear nut?A nut designed for use with devices, such as drilled clevis bolts and threaded taper pins. Like the castle nut, it is castellated for safetying
- 23What are the AN315 (fine thread) and AN335 (coarse thread) nuts?Nuts of rugged construction. This makes it suitable for carrying large tensional loads
- 24What is the AN340 (fine thread) and AN345 (coarse thread) nuts?Nuts that are much lighter than the plain hex nut and must be locked by an auxiliary device
- 25What is an AN316 nut?A nut that employed as a locking device for plain nuts sets screws, threaded rod ends, and other devices
- 26What is an AN350 nut?A nut that is intended for use where the desired tightness can be obtained by hand and where the assembly is frequently removed
- 27In what application are self-locking nuts never used?-Do not use self_locking nuts as joints
-Subject to rotation - 28What is the AN365 nylon locknut?Fiber locknut
- 29What is the AN364 low-profile nylon locknut?Nylon low profile locknut
- 30What is the AN363 metal locknut?All metal locknut
- 31What is the NAS679 low profile metal locknut?Low profile metal locknut
- 32How many times can a self-locking nut be reused?As many times. as long as it takes a wrench to pull it down. If you can use your fingers change it
- 33What is the temperature limit for the elastic locknut?No higher than 250 degrees F
- 34What are AN960 washers?Plain washers that are used under hex nuts. They provide a smooth bearing surface and act as a shim in obtaining correct grip length for a bolt and nut assembly
- 35What are AN970 washers?Large area washers
- 36What are AN935 washers?Lock washers that are used with machine screws or bolts where the self-locking or castellated-type nut is not appropriate. (Split lock washers)
- 37What are AN936 washers?-A-External lock washers
-B-Internal lock washers - 38When are slight clearances permitted between the bolts and the bolt-holes?Whenever bolts are used in tension, are not subject to reversal of load
- 39Given examples of when slight clearances are permitted between the bolt and bolt-holes?Pully brackets, conduit boxers, lining trim, and miscellaneous supports and brackets
- 40Which direction should the bolt head be installed?With the head on top or in the forward position
(Upward and Forward) - 41What is a rivet?A metal pin with a formed head on one end when the rivet is manufactured
- 42What is a "shop head"?The second head, formed either by hand or by pneumatic equipment
- 43What are the two types of rivets commonly used in aircraft?Common solid shank type and special (blind) rivets
- 44Aircraft countersunk have________ degree heads.100 degree
- 45Why does the FAA require that all parts including aircraft hardware to specifications set by a standardizing organization?The use of standardized materials in the production of aircraft makes each aircraft exactly the same as the previous one and makes them less expensive to build
- 46What are the characteristics of a rivet that are typically defined by the specification?Usually identified by the organization that originated them
- 47What are the two types of rivets in common use for aircraft?Universal head MS20470 or 100 degree countersunk head MS20426
- 48What are the characteristics by which solid rivets are identified?Their head type, size of shank, and their temper condition
- 49How are the temper designation and strength of a rivet indicated on a rivet?Digits or letters (Head Markings)
- 50What is the material that the majority of aircraft solid shank rivets made?Aluminum alloy
- 51What are the five grades of rivets usually available for aircraft rivets?-1100 (Commercially pure aluminum)
-2017-T [Raised Dot]
-2024-T [Raised Double Dash]
-2117-T (Copper alloy) [Raised Dot]
-5056 (Magnesium) [Raised Cross] - 52What aluminum alloy parts are riveted with 1100 rivets?Softer aluminum alloys, such as 1100, 3003, and 5052
- 53What rivet is used more than any other type of rivet for riveting aluminum alloy structures?The 2117-T rivet, known as the field rivet
- 54Why is the 2117-T used more than other types of rivets?Because it is ready for use as received and needs no further heat treating or annealing
- 55Where are the 2017-T and 2024-T used?In aluminum alloy structures where more strength is needed than is obtainable with the same size 2217-T rivet
- 56What are ice-box rivets?Rivets that have to be annealed
- 57When are 5056 rivets used?For riveting magnesium-alloy structures
- 58When are mild steel rivets used?For riveting steel parts
- 59When are monel rivets used?For riveting nickel-steel alloys
- 60Why must 2017-T rivets and 2024-T be annealed prior to being driven?The rivet must be soft or comparatively soft before a good head can be formed. They harden with age
- 61What is the process to anneal 2017-T and 2014-T rivets?The process of heat treating rivets is much the same as that for stock
- 62How long do you have after annealing 2024-T rivets to rivet before they age harden and become too brittle to rivet?They begin to age harden within a few minutes after being exposed to room temperature
- 63How long do you have after annealing 2017-T rivets before they age harden and become too brittle to rivet?About an hour
- 64What can you do to retard the aging process of 2017-T and 2014-T rivets if you are not ready to rivet after the rivets have been annealed?Keep them in a refrigerator
- 65How long will icebox rivets remain soft enough to rivet if they are sorted in a refrigerator (below 32 degrees) immediately after the annealing process?2 weeks
- 66Ice box rivets reach about one half their maximum strength in about____ hours and reach full strength in about ____ days after driving.1 hour, 4 days
- 67The textbook classifies rivets into Group A and Group B rivets. Which are the rivets in Group A?-1100
-3003
-5052
-6053 - 68Which are the rivets in Group B?-2117
-2017
-2124
-7075 - 69What is the significance of Group A and Group B rivets?Members within either group A or group B can be considered as similar to each other and will not react to others as similar to each other and will not react to others within the same group
- 70What are the head markings used on aircraft rivets?To classify their characteristics
- 71What is a universal head rivet?A combination of the roundhead, flathead, and brazier head
- 72What are the two part numbers used for countersunk head rivets?AN426 & MS20426
- 73What are the two part numbers used for universal head rivets?AN426 & MS20470
- 74There are letters and numbers that are added to the basic part number for rivets. What do the letters that follow the head style number specify?The letters designate alloy context
- 75What are the first numbers that follow the material code letters in aircraft rivets?They express the diameter of the rivet shank in 32nds of an inch
- 76What are the numbers that are the dash in aircraft rivets?Express the length of the rivet shank in 16ths of an inch
- 77What are blind rivets?Rivets that are often inserted in locations where one head (usually the shop head) cannot be seen.
(Used in hard to reach areas) - 78What are the four factors to consider when selecting the correct rivet for a particular application?-installation location
-composition of the material being riveted
-thickness of the material being riveted
-strength desired - 79In what types of rivet installations do you select a countersunk rivet?If the rivet is to be installed on an aerodynamically smooth surface or if clearance for an assembly is needed
- 80How do you choose the correct length of a blind rivet?The thickness of the material being riveted determines the overall length
- 81What are pull-through rivets?A stainless steel countersunk blind fastener designed to set surface flush on both sides of an application
- 82What are the factors to consider when choosing a pull-through rivet?-installation location
-composition of the material being riveted
-thickness of the material being riveted
strength desired - 83What are self-plugging rivets?A type of rivet that has a positive mechanical locking collar to resist vibrations that cause the friction lock rivets to loosen and possibly fall out
- 84What is the advantage to using bulbed Cherrylock rivets?It's proven fatigue strength makes it the only blind rivet interchangeable structurally with solid rivets
- 85What are pin rivets (most people refer to them as Hi Shear rivets)?Threadless bolts
- 86What are Taper-lok rivets?The strongest A-force on the walls of the hole because of it's tapered shape. It is designed to completely fill the hole, but unlike rivets, it fills the hole without deforming the shank
- 87What are Hi-Tigue fasteners?The standard fastening system It is primarily used wherever structural assembly operations demand controlled preload, automatic torque control and self-locking capabilities
- 88What are captive fasteners?Fasteners used for quick removal of engine nacelles, inspection panels, and areas where fast and easy access is important. It can turn in the body in which it is mounted, but will not drop out when it is unscrewed from the part it is holding
- 89What are turnlock fasteners?Fasteners that are used to secure inspection plates, doors, and other removable panels on aircraft
- 90What are the most commonly used turnlock fasteners?Dzus fasteners & Camloc fasteners
- 91What is a Dzus fastener?Fasteners consisting of a stud, grommet, an receptacle
- 92What are Camloc fasteners?Fasteners that are made in a variety of styles and designs, Including 2600, 2700, 40S51, and 4002 series
- 93What are Airlock fasteners?Fasteners that consist of three parts, a stud, a cross pin, and a stud receptacle
- 94What is the most used threaded fastener on aircraft?Screws
- 95What are the three types of screws that are commonly used?-structural screws
-machine screws
-self-tapping screws - 96What are structural screws?Screws that are made of alloy steel, are properly heat treated, and can be used as structural bolts
- 97What are machine screws?General purpose screws that are available in low carbon steel, brass, corrosion-resistant steel, and aluminum alloy
- 98What are self-tapping screws?Screws that are used for attaching removable parts, such as nameplates, to casting and parts in which the screw cuts it's own thread
- 99What is the difference between machine self-tapping screws and self-tapping sheetmetal screws?Machine self-tapping screws are used for attaching removable parts and self-tapping sheetmetal screws are used in temporary attachment of metal for riveting
- 100Explain the identification and coding system for screwsThe coding system used to identify screws is similar to that used for bolts, letters, and digits indicate their material composition
- 101What are nutplates?Nuts that are made to be riveted in place in place in an aricraft
- 102What are rivnuts?The trade name of a hollow blind rivet made of 6053 alluminum alloy, counter bored, and threaded on the inside
- 103what is the purpose of keyways that are a part of some rivets?They are used as a nutplate
- 104What is the proper process to drill out a previously installed fastener?To deburr the hole using either a very large drill bit or special deburring tool
- 105What is an Acres fastener sleeve?Thin-wall tubular element with a flared end
- 106Is repair of a aircraft part by installing an Acres sleeve an acceptable repair on aircraft?Yes
- 107Where are aircraft control cables used in aircraft?In the primary flight control systems
- 108What are the advantages for using aircraft control cable?It is strong and light weight, and it's
flexibility makes it easy to route through the aircraft - 109What are the disadvantages to using aircraft control cables?Tension must be adjusted frequently due to stretching and temperature changes
- 110What are aircraft control cables constructed from?A wire
- 111Cables designations are based on........?The number of strands and the number of wires in each strand
- 112What designations are most aircraft control cables?7x7 and 7x19
- 113What is 7x7 control cable?A cable consisting of 7 strands of 7 wires each
- 114What is 7x19 control cable?A cable made up of 7 strands of 19 wires each
- 115What is the diameter sizes of aircraft control cables?Aircraft control cables vary in diameter, ranging from 1/16 to 3/8 inch
- 116What are the different types of of fittings that are installed on aircraft control cables?Terminals, thimbles, blushings, and shackles
- 117Terminal fittings are usually installed on the cable by______.Thread end, fork end, eye end
- 118What is a turnbuckle?A mechanical screw device consisting of two threaded terminals and a threaded barrel
- 119What is the purpose of a turnbuckle?Making minor adjustments in cable length and for adjusting cable tension
- 120How do you identify the end of the turnbuckle that has the left-hand threads?By a groove or knurl around the end of the barrel
- 121What is the maximum number of threads of the terminal that should be exposed on either side of the turnbuckle?Three
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- Flashcards on Materials and Processes - Oral & Practical Projects, created by That One Guy on 19/10/2018.
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