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10026 test 1 corrosion prevention
47問 • 2年前
  • Zachary Halycz
  • 通報

    問題一覧

  • 1

    list the internal areas on the aircraft that are prone to corrosion?

    •exhaust trail areas •battery compartment / vents •lavatories •buffets •galley •bilge •internal fuel tanks •sea plane hulls and floats •animal transport •wheel wells, landing gear

  • 2

    6 systems on the aircraft that should be deactivated when working in affected areas?

    1. electrical system 2. hydraulic system 3. control system 4. environmental control system 5. fire suppression 6. pressurization control system

  • 3

    what is a jig?

    a device for holding parts in position to maintain their shape. can be constructed to distribute loads while repairs are being accomplished

  • 4

    when should you carry out an alignment or symmetry check?

    after the aircraft has been leveled

  • 5

    how to remove spot welds ?

    drill through center of weld #30, use putty knife to separate inner and outter frames.

  • 6

    what is corrosion?

    deterioration of a metal because of its chemical reaction with the surrounding environment

  • 7

    what are 4 conditions that must exist before corrosion can occur?

    1. anode (corrodes) 2. cathode (dissimilar metal) 3. electrolyte (liquid) 4. electrical contact

  • 8

    corrosion damage is classified under 4 standard types, what are they?

    1. negligible damage 2. damage repairable by “patching” 3. damage repairable by “insertion” 4. damage necessitating “replacement” of parts

  • 9

    determining the degree of corrosion damage, what are 3 classification?

    1. in spec 2. repairable 3. beyond economical repair 1. light 2. moderate 3. severe

  • 10

    methods used for determining the DEPTH of corrosion ?

    • visual • LPI • optical micrometer • depth dial gauge • feeler gauge

  • 11

    what is the easiest method to test metal composite skins for disbond / delamination ?

    TAP test

  • 12

    what is the most common NDT method used to detect corrosion?

    visual inspection

  • 13

    describe LPI, MPI, and eddy current

    1. Liquid penetrant inspection, uses liquid to reveal damage 2. magnetic particle inspection, uses magnetism to reveal damage 3. eddy current uses electrical current to find damage

  • 14

    describe following terms, jacks, lift slings, shoring ?

    jacks “jacks plane up” for working on control surfaces, wing panels” lift slings “holds aircraft on sling” shoring “process of supporting a structure to prevent collapse”

  • 15

    capillary force or action causes?

    “causes liquids to creep and crawl” reveals defects such as cracks & pits . interaction between contacting surface of a liquid and a solid

  • 16

    what is the next step, clean, inspect, repair and ___?

    apply corrosion preventative compound

  • 17

    what category does aluminum fall under ?

    non-ferrous

  • 18

    what are the limitations to NDT?

    only can be done by a NDT trained person

  • 19

    what is the best method to ensure hydraulic systems do not activate while working on them?

    lockout, tagout, de-energize system

  • 20

    why are bilge areas a common trouble spot on aircraft?

    debris and liquids make their way to the lowest part of the plane

  • 21

    battery compartments and vents are corrosion prone areas because?

    Fumes from overheated battery electrolyte are difficult to contain and will spread to

  • 22

    what type of material can magnetic particle inspection be used on?

    ferrous

  • 23

    when measuring the depth of corrosion, take a number of measurements, record the largest. True or False?

    true

  • 24

    what tool is not used to remove corroded parts?

    air chisel

  • 25

    when shoring an aircraft you are?

    supporting a structure to prevent collapse

  • 26

    what can be used to clean battery compartments and vents?

    sodium bicarbonate; will neutralize acid deposits

  • 27

    why is the Bilge area such a corrosive prone spot?

    bilge is a natural collection point for waste hydraulic fluids, water dirt, loose fasteners and other debris

  • 28

    what lock keeps aircraft doors open when doing maintenance ?

    gust lock

  • 29

    what does an aircraft sling do?

    function is to house aircraft and aircraft components. used to remove or install engines or other components

  • 30

    what is shoring and aircraft?

    supporting a structure to prevent collapse. used to support the aircraft structure when doing major parts removal

  • 31

    what is bracing?

    a strengthening wire to support a structure and is generally loaded in tension

  • 32

    what is a saw horse ?

    a beam with four legs used to support something

  • 33

    what is extremely expensive and difficult when dealing with corrosion?

    gaining access to the corrosion areas “removing panels, jacking and cribbing, etc

  • 34

    removing corrosion methods

    •hand sanding •scotch bright •mechanical sanding, grinding and buffing

  • 35

    can you use a larger drill bit than #30 when removing a spot weld?

    yes, but only if welds are difficult to break

  • 36

    is corrosion accelerated by high temeperature or cold temperature regions?

    high temp

  • 37

    surface corrosion appearance ?

    roughing, etching or pitting accompanied by powdery deposits

  • 38

    pitting corrosion appearance ?

    white or grey powdery deposits, similar to dust

  • 39

    interfranular corrosion

    attack along the grain boundaries of material

  • 40

    exfoliation corrosion appearance?

    below surface, lifting up or swelling

  • 41

    galvanic corrosion?

    dissimilar metals making electrical contact in presence of electrolyte

  • 42

    filiform corrosion

    special form of “oxygen” concentration cell. occurs when metal surfaces have an organic coating system

  • 43

    fretting corrosion

    damage can occur when two highly loaded surfaces which are not designed to move against each other.

  • 44

    how much material can you remove when cleaning corrosion ?

    AMM / manufactures allowable damage limit chart

  • 45

    if material removal of corrosion exceeds that AMM limits, what must you do?

    repair the part or replace it

  • 46

    is auto mated tap testing an approved method?

    yes

  • 47

    what are good tools for visual inspection?

    flashlight, mirror, magnifying glass

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    問題一覧

  • 1

    list the internal areas on the aircraft that are prone to corrosion?

    •exhaust trail areas •battery compartment / vents •lavatories •buffets •galley •bilge •internal fuel tanks •sea plane hulls and floats •animal transport •wheel wells, landing gear

  • 2

    6 systems on the aircraft that should be deactivated when working in affected areas?

    1. electrical system 2. hydraulic system 3. control system 4. environmental control system 5. fire suppression 6. pressurization control system

  • 3

    what is a jig?

    a device for holding parts in position to maintain their shape. can be constructed to distribute loads while repairs are being accomplished

  • 4

    when should you carry out an alignment or symmetry check?

    after the aircraft has been leveled

  • 5

    how to remove spot welds ?

    drill through center of weld #30, use putty knife to separate inner and outter frames.

  • 6

    what is corrosion?

    deterioration of a metal because of its chemical reaction with the surrounding environment

  • 7

    what are 4 conditions that must exist before corrosion can occur?

    1. anode (corrodes) 2. cathode (dissimilar metal) 3. electrolyte (liquid) 4. electrical contact

  • 8

    corrosion damage is classified under 4 standard types, what are they?

    1. negligible damage 2. damage repairable by “patching” 3. damage repairable by “insertion” 4. damage necessitating “replacement” of parts

  • 9

    determining the degree of corrosion damage, what are 3 classification?

    1. in spec 2. repairable 3. beyond economical repair 1. light 2. moderate 3. severe

  • 10

    methods used for determining the DEPTH of corrosion ?

    • visual • LPI • optical micrometer • depth dial gauge • feeler gauge

  • 11

    what is the easiest method to test metal composite skins for disbond / delamination ?

    TAP test

  • 12

    what is the most common NDT method used to detect corrosion?

    visual inspection

  • 13

    describe LPI, MPI, and eddy current

    1. Liquid penetrant inspection, uses liquid to reveal damage 2. magnetic particle inspection, uses magnetism to reveal damage 3. eddy current uses electrical current to find damage

  • 14

    describe following terms, jacks, lift slings, shoring ?

    jacks “jacks plane up” for working on control surfaces, wing panels” lift slings “holds aircraft on sling” shoring “process of supporting a structure to prevent collapse”

  • 15

    capillary force or action causes?

    “causes liquids to creep and crawl” reveals defects such as cracks & pits . interaction between contacting surface of a liquid and a solid

  • 16

    what is the next step, clean, inspect, repair and ___?

    apply corrosion preventative compound

  • 17

    what category does aluminum fall under ?

    non-ferrous

  • 18

    what are the limitations to NDT?

    only can be done by a NDT trained person

  • 19

    what is the best method to ensure hydraulic systems do not activate while working on them?

    lockout, tagout, de-energize system

  • 20

    why are bilge areas a common trouble spot on aircraft?

    debris and liquids make their way to the lowest part of the plane

  • 21

    battery compartments and vents are corrosion prone areas because?

    Fumes from overheated battery electrolyte are difficult to contain and will spread to

  • 22

    what type of material can magnetic particle inspection be used on?

    ferrous

  • 23

    when measuring the depth of corrosion, take a number of measurements, record the largest. True or False?

    true

  • 24

    what tool is not used to remove corroded parts?

    air chisel

  • 25

    when shoring an aircraft you are?

    supporting a structure to prevent collapse

  • 26

    what can be used to clean battery compartments and vents?

    sodium bicarbonate; will neutralize acid deposits

  • 27

    why is the Bilge area such a corrosive prone spot?

    bilge is a natural collection point for waste hydraulic fluids, water dirt, loose fasteners and other debris

  • 28

    what lock keeps aircraft doors open when doing maintenance ?

    gust lock

  • 29

    what does an aircraft sling do?

    function is to house aircraft and aircraft components. used to remove or install engines or other components

  • 30

    what is shoring and aircraft?

    supporting a structure to prevent collapse. used to support the aircraft structure when doing major parts removal

  • 31

    what is bracing?

    a strengthening wire to support a structure and is generally loaded in tension

  • 32

    what is a saw horse ?

    a beam with four legs used to support something

  • 33

    what is extremely expensive and difficult when dealing with corrosion?

    gaining access to the corrosion areas “removing panels, jacking and cribbing, etc

  • 34

    removing corrosion methods

    •hand sanding •scotch bright •mechanical sanding, grinding and buffing

  • 35

    can you use a larger drill bit than #30 when removing a spot weld?

    yes, but only if welds are difficult to break

  • 36

    is corrosion accelerated by high temeperature or cold temperature regions?

    high temp

  • 37

    surface corrosion appearance ?

    roughing, etching or pitting accompanied by powdery deposits

  • 38

    pitting corrosion appearance ?

    white or grey powdery deposits, similar to dust

  • 39

    interfranular corrosion

    attack along the grain boundaries of material

  • 40

    exfoliation corrosion appearance?

    below surface, lifting up or swelling

  • 41

    galvanic corrosion?

    dissimilar metals making electrical contact in presence of electrolyte

  • 42

    filiform corrosion

    special form of “oxygen” concentration cell. occurs when metal surfaces have an organic coating system

  • 43

    fretting corrosion

    damage can occur when two highly loaded surfaces which are not designed to move against each other.

  • 44

    how much material can you remove when cleaning corrosion ?

    AMM / manufactures allowable damage limit chart

  • 45

    if material removal of corrosion exceeds that AMM limits, what must you do?

    repair the part or replace it

  • 46

    is auto mated tap testing an approved method?

    yes

  • 47

    what are good tools for visual inspection?

    flashlight, mirror, magnifying glass