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Aircraft Structures

Aircraft Structures
100問 • 1年前
  • Lenard Espiritu
    • 通報

    問題一覧

  • 1

    Which rivets should be selected to join two sheets of .032-inch aluminum?

    MS20470AD-4-4

  • 2

    Which is considered good practice concerning the installation of acrylic plastics?

    When rivets are used, adequate spacer or other satisfactory means to prevent excessive tightening of the frame to the plastic should be provided.

  • 3

    Aircraft structural units, such as spars, engine supports, etc., which have been built up from sheet metal, are normally

    Repairable, using approved methods.

  • 4

    Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the

    Possibility of causing delamination.

  • 5

    A potted compound repair on honeycomb can usually be made on damages less than

    1 inch in diameter

  • 6

    Composite fabric material is considered to be the strongest in what direction?

    Warp

  • 7

    You can distinguish between aluminum and aluminum alloy by

    Testing with a 10 percent solution of caustic soda.

  • 8

    Which of the following need nöt be considered when determining minimune lrivet spacing ?ribed as a

    Rivet length

  • 9

    A category of plastic material that is capable of softening or flowing when reheated is described as a

    Thermoplastic

  • 10

    Fiberglass laminate damage not exceeding the first layer or ply can be repaired by

    Filling with a putty consisting of a compatible resin and clean, short glass fibers.

  • 11

    When comparing the machining techniques for stainless steel sheet material to those for aluminum alloy sheet, it is normally considered good practice to drill the stainless steel at a

    Lower speed with more pressure applied to the drill.

  • 12

    When inspecting a composite panel using the ring test/tapping method, a dull thud may indicate

    Separation of the laminates.

  • 13

    One of the main advantages of Hi-Lok type fasteners over earlier generations is that

    They can be installed with ordinary hand tools.

  • 14

    When an MS20470D rivet is installed, its full shear strength is obtained

    Only after a period of age hardening.

  • 15

    A single-lap sheet splice is to be used to repair a section of damaged aluminum skin. If a double row of 1/8-inch rivets is used, the minimum allowable overlap will be

    13/16 inch

  • 16

    The markings on the head of a Dzus fastener identify the

    Body diameter, type of head, and length of the fastener.

  • 17

    When straightening members made of 2024-4, you should

    Straighten cold and reinforce.

  • 18

    How many MS20470 AD-4-6 rivets will be required to attach a 10 x 5 inch plate, using a single row of rivets, minimum edge distance, and 4D spacing?

    56

  • 19

    When drilling stainless steel, the drill used should have an included angle of

    140° and turn at a low speed

  • 20

    Which statement is true regarding the inspection of a stressed skin metal wing assembly known to have been critically loaded?

    If genuine rivet tipping has occurred, groups of consecutive rivet heads will be tipped in the same direction.

  • 21

    What is the minimum edge distance for aircraft rivets?

    Two times the diameter of the rivet shank.

  • 22

    Heat-treated rivets in the D and DD series that are not driven within the prescribed time after heat treatment or removal from refrigeration

    Must be reheat treated before use.

  • 23

    When repairing puncture-type damage of a metal faced laminated honeycomb panel, the edges of the doubler should be tapered to

    100 times the thickness of the metal.

  • 24

    If a streamline cover plate is to be hand formed using a form block, a piece of dead soft aluminum should first be placed over the hollow portion of the mold and securely fastened in place. The bumping operation should be

    Started by tapping the aluminum lightly around the edges and gradually working down into the center.

  • 25

    What is the minimum spacing for a single row of aircraft rivets?

    Three times the diameter of the rivet shank.

  • 26

    The primary alloying agent of 2024-3 is indicated by the number

    2

  • 27

    A well-designed rivet joint will subject the rivets to

    Shear loads

  • 28

    The coefficient of expansion of most plastic enclosure materials is

    Greater than both steel and aluminum.

  • 29

    What is one of the determining factors which permits machine countersinking when flush riveting?

    Thickness of the material is greater than the thickness of the rivet head.

  • 30

    The preferred way to make permanent repairs on composites is by

    Laminating on new repair plies.

  • 31

    When riveting dissimilar metals together, what precautions must be taken to prevent an electrolytic action?

    Place a protective separator between areas of potential electrical difference.

  • 32

    What reference tool is used to determine how the fiber is to be oriented for a particular ply of fabric?

    Warp clock (or compass)

  • 33

    Which of the following are generally characteristic of carbon/graphite fiber composites? 1. Flexibility 2. Stiffness 3. High compressive strength 4. Corrosive effect in contact with aluminum 5. Ability to conduct electricity

    2, 3, and 4

  • 34

    What should be the included angle of a twist drill for soft metals?

    90°

  • 35

    A factor which determines the minimum space between rivets is the

    Diameter of the rivets being used.

  • 36

    When conducting a tap test on a composite panel, which of the following sounds would indicate delamination?

    Dull thud

  • 37

    Which is an identifying characteristic of acrylic plastics?

    Zinc chloride will have no effect.

  • 38

    A sheet metal repair is to be made using two pieces of 0.040-inch aluminum riveted together. All rivet holes are drilled for 3/32-inch rivets. The length of the rivets to be used will be

    1/4 inch

  • 39

    Shallow scratches in sheet metal may be repaired by

    Burnishing

  • 40

    Clad aluminum alloys are used in aircraft because they

    Have surface layers of pure aluminum or aluminum alloy bonded to the core material to inhibit corrosion.

  • 41

    Joggles in removed rivet shanks would indicate partial

    Shear failure

  • 42

    Which of the following, when added to wet resins, provide strength for the repair of damaged fastener holes in composite panels? 1. Microballoons 2. Flox 3. Chopped fibers

    2 and 3

  • 43

    Which is correct concerning the use of a file?

    Apply pressure on the forward stroke, only, except when filing very soft metals such as lead or aluminum.

  • 44

    The flat layout or blank length of a piece of metal from which a simple L-shaped bracket 3 inches by 1 inch is to be bent depends upon the radius of the desired bend. The bracket which will require the greatest amount of material is one which has a bend radius of

    1/8 inch

  • 45

    What type of loads cause the most rivet failures?

    Shear

  • 46

    How many of the following are benefits of using microballoons when making repairs to laminated honeycomb panels? 1. Greater concentrations of resin in edges and corners. 2. Improved strength to weight ratio. 3. Less density. 4. Lower stress concentrations.

    2, 3, and 4

  • 47

    The sight line on a sheet metal flat layout to be bent in a cornice or box brake is measured and marked

    One radius from the bend tangent line that is placed under the brake.

  • 48

    A DD' rivet is heat treated before use to

    Soften to facilitate riveting

  • 49

    The sharpest bend that can be placed in a piece of metal without critically weakening the part is called the

    Minimum radius of bend

  • 50

    Which of the following drill bit types work best when drilling an aramid fiber (Kevlar) composite laminate?

    Carbide W-Point

  • 51

    When a piece of aluminum alloy is to be bent using a minimum radius for the type and thickness of material,

    The layout should be made so that the bend will be 90° to the grain of the sheet.

  • 52

    What is generally the best procedure to use when removing a solid shank rivet?

    Drill to the base of the manufactured rivet head with a drill one size smaller than the rivet shank and remove the rivet with a punch.

  • 53

    What should be the included angle of a twist drill for hard metal?

    118°

  • 54

    The monocoque fuselage relies largely on the strength of

    Skin or covering

  • 55

    What is indicated by a black 'smoky' residue streaming back from some of the rivets on an aircraft?

    Fretting corrosion is occurring between the rivets and the skin.

  • 56

    What is the minimum edge distance allowed for aluminum alloy single lap sheet splices containing a single row of rivets as compared to a joint with multiple rows, all rivets being equal in diameter?

    The minimum edge distance for the single row is equal to that for the multiple row.

  • 57

    Most rivets used in aircraft construction have

    Dimples

  • 58

    Unless otherwise specified, the radius of a bend is. the

    Inside radius of the metal being formed.

  • 59

    MS20426AD-6-5 indicates a countersunk rivet which has

    An overall length of 5/16 inch.

  • 60

    (1) When performing a ring (coin tap) test on composite structures, a change in sound may be due to damage or to transition to a different internal structure. (2) The extent of separation damage in composite structures is most accurately measured by a ring (coin tap) test. Regarding the above statements,

    Only No. 1 is true.

  • 61

    What is the material layer used within the vacuum bag pressure system to absorb excess resin during curing called?

    Bleeder

  • 62

    Select the alternative which best describes the function of the flute section of a twist drill.

    Forms the cutting edges of the drill point.

  • 63

    Which of the following is one advantage of Hi-lok fasteners?

    Inability to be over-torqued.

  • 64

    On a sheet metal fitting layout with a single bend, allow for stretching by

    Subtracting the setback from both legs.

  • 65

    The length of rivet to be chosen when making a structural repair that involves the joining of 0.032-inch and 0.064-inch aluminum sheet, drilled with a No. 30 drill, is

    5/16 inch

  • 66

    What type of bit should be used to drill holes in Plexiglas?

    A specially modified twist drill.

  • 67

    Rivet pitch is the distance between the

    Centers of adjacent rivets in the same row.

  • 68

    The part of a replacement honeycomb core that must line up with the adjacent original is the

    Ribbon direction

  • 69

    When repairing large, flat surfaces with polyester resins, warping of the surface is likely to occur. One method of reducing the amount of warpage is to

    Use short strips of fiberglass in the bonded repair.

  • 70

    The dimensions of an MS20430AD-4-8 rivet are

    1/8 inch in diameter and 1/2 inch long.

  • 71

    If a new safety belt is to be installed in an aircraft, the belt must conform to the strength requirements in which document?

    TSO C22

  • 72

    One method of inspecting a laminated fiberglass structure that has been subjected to damage is to

    Strip the damaged area of all paint and shine a strong light through the structure.

  • 73

    What is the purpose of a gusset or gusset plate used in the construction and repair of aircraft structures?

    To join and reinforce intersecting structural members.

  • 74

    Which fiber to resin (percent) ration for advanced composite wet lay-ups is generally considered the best for strength?

    60:40

  • 75

    What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?

    To retard age hardening.

  • 76

    Threaded rivets (Rivnuts) are commonly used to

    Attach parts or components with screws to sheet metal.

  • 77

    Under certain conditions, type A rivets are not used because of their

    Low strength characteristics.

  • 78

    When making repairs to fiberglass, cleaning of the area to be repaired is essential for a good bond. The final cleaning should be made using

    MEK (methyl ethyl ketone)

  • 79

    The identifying marks on the heads of aluminum alloy rivets indicate the

    Specific alloy used in the manufacture of the rivets.

  • 80

    Metal fasteners used with carbon/graphite composite structures

    Must be constructed of material such as titanium or corrosion resistant steel.

  • 81

    If no scratches are visible after transparent plastic enclosure materials have been cleaned, their surfaces should be

    Covered with a thin coat of wax.

  • 82

    If it is necessary to compute a bend allowance problem and bend allowance tables are not available, the neutral axis of the bend can be

    Found by adding approximately one-half of the stock thickness to the bend radius.

  • 83

    The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud diameter is measured in

    Sixteenths of an inch

  • 84

    Rivet gauge, or transverse pitch is the distance between the

    Centers of rivets in adjacent rows.

  • 85

    The length of a rivet to be used to join a sheet of .032- inch and 064-inch aluminum alloy should be equal to

    One and one-half times the rivet diameter plus .096 inch

  • 86

    Parts fabricated from Alclad 2024-3 aluminum sheet stock must have all

    Scratches, kinks, tool marks, nicks, etc., must be held to a minimum.

  • 87

    The classification for high tensile strength fiberglass used in aircraft structure is

    S-glass

  • 88

    What is the most common method of cementing transparent plastics?

    Soak method

  • 89

    Fiberglass laminate damage that extends completely through one facing and into the core

    Requires the replacement of the damaged core and facing.

  • 90

    Alloy 2117 rivets are heat treated

    By the manufacturer and do not require heat treatment before being driven.

  • 91

    When installing transparent plastic enclosures which are retained by bolts extending through the plastic material and self-locking nuts, the nuts should be

    Tightened to a firm fit, then backed off one full turn.

  • 92

    Sandwich panels made of metal honeycomb construction are used on modern aircraft because this type of construction.

    Has a high strength to weight ratio.

  • 93

    If an aircraft's transparent plastic enclosures exhibit fine cracks which may extend in a network over or under the surface or through the plastic, the plastic is said to be

    Crazing

  • 94

    One of the best ways to assure that a properly prepared batch of matrix resin has been achieved is to

    Have mixed enough for a test sample.

  • 95

    Which of the following are generally characteristic of aramid fiber (Kevlar) composites? 1. High tensile strength 2. Flexibility 3. Stiffness 4. Corrosive effect in contact with aluminum 5. Ability to conduct electricity

    1 and 2

  • 96

    Which part of 2024-3 aluminum alloy indicates the temper designation?

    T3

  • 97

    The strength and stiffness of a properly constructed composite buildup depends primarily on

    The orientation of the plies to the load direction.

  • 98

    Which parts) of a semi-monocoque fuselage prevents) tension and compression from bending the fuselage?

    Longerons and stringers

  • 99

    Which procedure is correct when using a reamer to finish a drilled hole to the correct size?

    Turn the reamer only in the cutting direction.

  • 100

    The most important factors needed to make a flat pattern layout are

    Radius, thickness, and degree of bend.

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    問題一覧

  • 1

    Which rivets should be selected to join two sheets of .032-inch aluminum?

    MS20470AD-4-4

  • 2

    Which is considered good practice concerning the installation of acrylic plastics?

    When rivets are used, adequate spacer or other satisfactory means to prevent excessive tightening of the frame to the plastic should be provided.

  • 3

    Aircraft structural units, such as spars, engine supports, etc., which have been built up from sheet metal, are normally

    Repairable, using approved methods.

  • 4

    Hole filling fasteners (for example, MS20470 rivets) should not be used in composite structures primarily because of the

    Possibility of causing delamination.

  • 5

    A potted compound repair on honeycomb can usually be made on damages less than

    1 inch in diameter

  • 6

    Composite fabric material is considered to be the strongest in what direction?

    Warp

  • 7

    You can distinguish between aluminum and aluminum alloy by

    Testing with a 10 percent solution of caustic soda.

  • 8

    Which of the following need nöt be considered when determining minimune lrivet spacing ?ribed as a

    Rivet length

  • 9

    A category of plastic material that is capable of softening or flowing when reheated is described as a

    Thermoplastic

  • 10

    Fiberglass laminate damage not exceeding the first layer or ply can be repaired by

    Filling with a putty consisting of a compatible resin and clean, short glass fibers.

  • 11

    When comparing the machining techniques for stainless steel sheet material to those for aluminum alloy sheet, it is normally considered good practice to drill the stainless steel at a

    Lower speed with more pressure applied to the drill.

  • 12

    When inspecting a composite panel using the ring test/tapping method, a dull thud may indicate

    Separation of the laminates.

  • 13

    One of the main advantages of Hi-Lok type fasteners over earlier generations is that

    They can be installed with ordinary hand tools.

  • 14

    When an MS20470D rivet is installed, its full shear strength is obtained

    Only after a period of age hardening.

  • 15

    A single-lap sheet splice is to be used to repair a section of damaged aluminum skin. If a double row of 1/8-inch rivets is used, the minimum allowable overlap will be

    13/16 inch

  • 16

    The markings on the head of a Dzus fastener identify the

    Body diameter, type of head, and length of the fastener.

  • 17

    When straightening members made of 2024-4, you should

    Straighten cold and reinforce.

  • 18

    How many MS20470 AD-4-6 rivets will be required to attach a 10 x 5 inch plate, using a single row of rivets, minimum edge distance, and 4D spacing?

    56

  • 19

    When drilling stainless steel, the drill used should have an included angle of

    140° and turn at a low speed

  • 20

    Which statement is true regarding the inspection of a stressed skin metal wing assembly known to have been critically loaded?

    If genuine rivet tipping has occurred, groups of consecutive rivet heads will be tipped in the same direction.

  • 21

    What is the minimum edge distance for aircraft rivets?

    Two times the diameter of the rivet shank.

  • 22

    Heat-treated rivets in the D and DD series that are not driven within the prescribed time after heat treatment or removal from refrigeration

    Must be reheat treated before use.

  • 23

    When repairing puncture-type damage of a metal faced laminated honeycomb panel, the edges of the doubler should be tapered to

    100 times the thickness of the metal.

  • 24

    If a streamline cover plate is to be hand formed using a form block, a piece of dead soft aluminum should first be placed over the hollow portion of the mold and securely fastened in place. The bumping operation should be

    Started by tapping the aluminum lightly around the edges and gradually working down into the center.

  • 25

    What is the minimum spacing for a single row of aircraft rivets?

    Three times the diameter of the rivet shank.

  • 26

    The primary alloying agent of 2024-3 is indicated by the number

    2

  • 27

    A well-designed rivet joint will subject the rivets to

    Shear loads

  • 28

    The coefficient of expansion of most plastic enclosure materials is

    Greater than both steel and aluminum.

  • 29

    What is one of the determining factors which permits machine countersinking when flush riveting?

    Thickness of the material is greater than the thickness of the rivet head.

  • 30

    The preferred way to make permanent repairs on composites is by

    Laminating on new repair plies.

  • 31

    When riveting dissimilar metals together, what precautions must be taken to prevent an electrolytic action?

    Place a protective separator between areas of potential electrical difference.

  • 32

    What reference tool is used to determine how the fiber is to be oriented for a particular ply of fabric?

    Warp clock (or compass)

  • 33

    Which of the following are generally characteristic of carbon/graphite fiber composites? 1. Flexibility 2. Stiffness 3. High compressive strength 4. Corrosive effect in contact with aluminum 5. Ability to conduct electricity

    2, 3, and 4

  • 34

    What should be the included angle of a twist drill for soft metals?

    90°

  • 35

    A factor which determines the minimum space between rivets is the

    Diameter of the rivets being used.

  • 36

    When conducting a tap test on a composite panel, which of the following sounds would indicate delamination?

    Dull thud

  • 37

    Which is an identifying characteristic of acrylic plastics?

    Zinc chloride will have no effect.

  • 38

    A sheet metal repair is to be made using two pieces of 0.040-inch aluminum riveted together. All rivet holes are drilled for 3/32-inch rivets. The length of the rivets to be used will be

    1/4 inch

  • 39

    Shallow scratches in sheet metal may be repaired by

    Burnishing

  • 40

    Clad aluminum alloys are used in aircraft because they

    Have surface layers of pure aluminum or aluminum alloy bonded to the core material to inhibit corrosion.

  • 41

    Joggles in removed rivet shanks would indicate partial

    Shear failure

  • 42

    Which of the following, when added to wet resins, provide strength for the repair of damaged fastener holes in composite panels? 1. Microballoons 2. Flox 3. Chopped fibers

    2 and 3

  • 43

    Which is correct concerning the use of a file?

    Apply pressure on the forward stroke, only, except when filing very soft metals such as lead or aluminum.

  • 44

    The flat layout or blank length of a piece of metal from which a simple L-shaped bracket 3 inches by 1 inch is to be bent depends upon the radius of the desired bend. The bracket which will require the greatest amount of material is one which has a bend radius of

    1/8 inch

  • 45

    What type of loads cause the most rivet failures?

    Shear

  • 46

    How many of the following are benefits of using microballoons when making repairs to laminated honeycomb panels? 1. Greater concentrations of resin in edges and corners. 2. Improved strength to weight ratio. 3. Less density. 4. Lower stress concentrations.

    2, 3, and 4

  • 47

    The sight line on a sheet metal flat layout to be bent in a cornice or box brake is measured and marked

    One radius from the bend tangent line that is placed under the brake.

  • 48

    A DD' rivet is heat treated before use to

    Soften to facilitate riveting

  • 49

    The sharpest bend that can be placed in a piece of metal without critically weakening the part is called the

    Minimum radius of bend

  • 50

    Which of the following drill bit types work best when drilling an aramid fiber (Kevlar) composite laminate?

    Carbide W-Point

  • 51

    When a piece of aluminum alloy is to be bent using a minimum radius for the type and thickness of material,

    The layout should be made so that the bend will be 90° to the grain of the sheet.

  • 52

    What is generally the best procedure to use when removing a solid shank rivet?

    Drill to the base of the manufactured rivet head with a drill one size smaller than the rivet shank and remove the rivet with a punch.

  • 53

    What should be the included angle of a twist drill for hard metal?

    118°

  • 54

    The monocoque fuselage relies largely on the strength of

    Skin or covering

  • 55

    What is indicated by a black 'smoky' residue streaming back from some of the rivets on an aircraft?

    Fretting corrosion is occurring between the rivets and the skin.

  • 56

    What is the minimum edge distance allowed for aluminum alloy single lap sheet splices containing a single row of rivets as compared to a joint with multiple rows, all rivets being equal in diameter?

    The minimum edge distance for the single row is equal to that for the multiple row.

  • 57

    Most rivets used in aircraft construction have

    Dimples

  • 58

    Unless otherwise specified, the radius of a bend is. the

    Inside radius of the metal being formed.

  • 59

    MS20426AD-6-5 indicates a countersunk rivet which has

    An overall length of 5/16 inch.

  • 60

    (1) When performing a ring (coin tap) test on composite structures, a change in sound may be due to damage or to transition to a different internal structure. (2) The extent of separation damage in composite structures is most accurately measured by a ring (coin tap) test. Regarding the above statements,

    Only No. 1 is true.

  • 61

    What is the material layer used within the vacuum bag pressure system to absorb excess resin during curing called?

    Bleeder

  • 62

    Select the alternative which best describes the function of the flute section of a twist drill.

    Forms the cutting edges of the drill point.

  • 63

    Which of the following is one advantage of Hi-lok fasteners?

    Inability to be over-torqued.

  • 64

    On a sheet metal fitting layout with a single bend, allow for stretching by

    Subtracting the setback from both legs.

  • 65

    The length of rivet to be chosen when making a structural repair that involves the joining of 0.032-inch and 0.064-inch aluminum sheet, drilled with a No. 30 drill, is

    5/16 inch

  • 66

    What type of bit should be used to drill holes in Plexiglas?

    A specially modified twist drill.

  • 67

    Rivet pitch is the distance between the

    Centers of adjacent rivets in the same row.

  • 68

    The part of a replacement honeycomb core that must line up with the adjacent original is the

    Ribbon direction

  • 69

    When repairing large, flat surfaces with polyester resins, warping of the surface is likely to occur. One method of reducing the amount of warpage is to

    Use short strips of fiberglass in the bonded repair.

  • 70

    The dimensions of an MS20430AD-4-8 rivet are

    1/8 inch in diameter and 1/2 inch long.

  • 71

    If a new safety belt is to be installed in an aircraft, the belt must conform to the strength requirements in which document?

    TSO C22

  • 72

    One method of inspecting a laminated fiberglass structure that has been subjected to damage is to

    Strip the damaged area of all paint and shine a strong light through the structure.

  • 73

    What is the purpose of a gusset or gusset plate used in the construction and repair of aircraft structures?

    To join and reinforce intersecting structural members.

  • 74

    Which fiber to resin (percent) ration for advanced composite wet lay-ups is generally considered the best for strength?

    60:40

  • 75

    What is the purpose of refrigerating 2017 and 2024 aluminum alloy rivets after heat treatment?

    To retard age hardening.

  • 76

    Threaded rivets (Rivnuts) are commonly used to

    Attach parts or components with screws to sheet metal.

  • 77

    Under certain conditions, type A rivets are not used because of their

    Low strength characteristics.

  • 78

    When making repairs to fiberglass, cleaning of the area to be repaired is essential for a good bond. The final cleaning should be made using

    MEK (methyl ethyl ketone)

  • 79

    The identifying marks on the heads of aluminum alloy rivets indicate the

    Specific alloy used in the manufacture of the rivets.

  • 80

    Metal fasteners used with carbon/graphite composite structures

    Must be constructed of material such as titanium or corrosion resistant steel.

  • 81

    If no scratches are visible after transparent plastic enclosure materials have been cleaned, their surfaces should be

    Covered with a thin coat of wax.

  • 82

    If it is necessary to compute a bend allowance problem and bend allowance tables are not available, the neutral axis of the bend can be

    Found by adding approximately one-half of the stock thickness to the bend radius.

  • 83

    The Dzus turnlock fastener consists of a stud, grommet, and receptacle. The stud diameter is measured in

    Sixteenths of an inch

  • 84

    Rivet gauge, or transverse pitch is the distance between the

    Centers of rivets in adjacent rows.

  • 85

    The length of a rivet to be used to join a sheet of .032- inch and 064-inch aluminum alloy should be equal to

    One and one-half times the rivet diameter plus .096 inch

  • 86

    Parts fabricated from Alclad 2024-3 aluminum sheet stock must have all

    Scratches, kinks, tool marks, nicks, etc., must be held to a minimum.

  • 87

    The classification for high tensile strength fiberglass used in aircraft structure is

    S-glass

  • 88

    What is the most common method of cementing transparent plastics?

    Soak method

  • 89

    Fiberglass laminate damage that extends completely through one facing and into the core

    Requires the replacement of the damaged core and facing.

  • 90

    Alloy 2117 rivets are heat treated

    By the manufacturer and do not require heat treatment before being driven.

  • 91

    When installing transparent plastic enclosures which are retained by bolts extending through the plastic material and self-locking nuts, the nuts should be

    Tightened to a firm fit, then backed off one full turn.

  • 92

    Sandwich panels made of metal honeycomb construction are used on modern aircraft because this type of construction.

    Has a high strength to weight ratio.

  • 93

    If an aircraft's transparent plastic enclosures exhibit fine cracks which may extend in a network over or under the surface or through the plastic, the plastic is said to be

    Crazing

  • 94

    One of the best ways to assure that a properly prepared batch of matrix resin has been achieved is to

    Have mixed enough for a test sample.

  • 95

    Which of the following are generally characteristic of aramid fiber (Kevlar) composites? 1. High tensile strength 2. Flexibility 3. Stiffness 4. Corrosive effect in contact with aluminum 5. Ability to conduct electricity

    1 and 2

  • 96

    Which part of 2024-3 aluminum alloy indicates the temper designation?

    T3

  • 97

    The strength and stiffness of a properly constructed composite buildup depends primarily on

    The orientation of the plies to the load direction.

  • 98

    Which parts) of a semi-monocoque fuselage prevents) tension and compression from bending the fuselage?

    Longerons and stringers

  • 99

    Which procedure is correct when using a reamer to finish a drilled hole to the correct size?

    Turn the reamer only in the cutting direction.

  • 100

    The most important factors needed to make a flat pattern layout are

    Radius, thickness, and degree of bend.