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Composite Structures

Quiz by McConkie, Ben

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20 questions
Show answers
  • Q1
    Metal fasteners used with carbon/graphite composite structures
    must be constructed of material such as titanium or corrosion resistant steel.
    may be constructed of any of the metals commonly used in aircraft fasteners.
    must be constructed of high strength aluminum-lithium alloy.
    30s
  • Q2
    Sandwich panels made of metal honeycomb construction are used on modern aircraft because this type of construction
    has a high strength to weight ratio.
    is lighter than single sheet skin of the same strength and is more corrosion resistant.
    may be repaired by gluing replacement skin to the inner core material with thermoplastic resin.
    30s
  • Q3
    (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. 2 is true.
    only No. 1 is true.
    both No. 1 and No. 2 are true.
    30s
  • Q4
    Which of these methods may be used to inspect fiberglass/honeycomb structures for entrapped water? 1. Acoustic emission monitoring. 2. X-ray. 3. Backlighting.
    2 and 3.
    all of the above
    1 and 3.
    1 and 2.
    30s
  • Q5
    When balsa wood is used to replace a damaged honeycomb core, the plug should be cut so that
    the grain is parallel to the skin.
    it is about 1/8 inch undersize to allow sufficient bonding material to be applied.
    the grain is perpendicular to the skin.
    30s
  • Q6
    When repairing puncture-type damage of a metal faced laminated honeycomb panel, the edges of the doubler should be tapered to
    two times the thickness of the metal.
    whatever is desired for a neat, clean appearance.
    100 times the thickness of the metal.
    30s
  • Q7
    One of the best ways to assure that a properly prepared batch of matrix resin has been achieved is to
    test the viscosity of the resin immediately after mixing.
    perform a chemical composition analysis.
    have mixed enough for a test sample.
    30s
  • Q8
    How does acoustic emission testing detect defects in composite materials?
    By picking up the 'noise' of any deterioration that may be present.
    By analyzing ultrasonic signals transmitted into the parts being inspected.
    By creating sonogram pictures of the areas being inspected.
    30s
  • Q9
    What precaution, if any, should be taken to prevent corrosion inside a repaired metal honeycomb structure?
    Prime the repair with a corrosion inhibitor and seal from the atmosphere.
    Paint the outside area with several coats of exterior paint.
    None. Honeycomb is usually made from a man-made or fibrous material which is not susceptible to corrosion.
    30s
  • Q10
    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.
    use an eddy current probe on both sides of the damaged area.
    use dye-penetrant inspection procedures, exposing the entire damaged area to the penetrant solution.
    30s
  • Q11
    When inspecting a composite panel using the ring test/tapping method, a dull thud may indicate
    less than full strength curing of the matrix.
    separation of the laminates.
    an area of too much matrix between fiber layers.
    30s
  • Q12
    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
    All of the above.
    2, 3, and 4.
    1, 2, and 4.
    30s
  • Q13
    The length of time that a catalyzed resin will remain in a workable state is called the
    shelf life.
    service life.
    pot life.
    30s
  • Q14
    A category of plastic material that is capable of softening or flowing when reheated is described as a
    thermoplastic.
    thermoset.
    thermocure.
    30s
  • Q15
    The classification for high tensile strength fiberglass used in aircraft structures is
    E-glass.
    G-glass.
    S-glass.
    30s

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