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The complete curing of a composite resin can be determined by
keeping a test sample of the resin used
The fabric layer in the vacuum bagging process that determines the amount of resin removed from the laminate component is known as the
bleeder/breather
Moisture, mildew, chemicals, and acids have no effect on
What is glass fabric?
The loose fibers that are mixed into a matrix for added strength is known as
flox
The preferred way to cut curves into transparent plastics is to use a
band saw
What is the role of the matrix component in the composite material?
The matrix supports the fibers and bonds them together
An NDI method where very high frequency sound waves are induced into a composite structure to detect the presence of delaminations, voids, or inconsistencies is known as
ultrasonic testing
What is the recommended fastener for a composite panel that must be removed periodically for maintenance?
Screw and nutplate
The preferred way to cut closed cell foam core material is a/an
hot wire cutter
The length of time that a catalyzed resin will remain in a workable state is called the
pot life
The fibrous material that is used in advanced composite structures that has concerns with steel fasteners because of galvanic corrosion is
Carbon fiber
Styrofoam products used in aircraft composite construction are
closed cell products
A matrix has a pot life of 30 minutes. This means that the matrix will
cure in 30 minutes
To prevent premature curing, all prepreg materials must be stored
in a refrigerated environment under 0 degrees F
A potted compound repair on honeycomb can usually be made on damages less than
.5 inch in diameter
Microballoons used in composite structures
are used with matrix to fill minor voids
During NDI, it is found that several layers of fiber have separated from each other. This damage would be classified as
delamination
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
The coefficient of expansion of most plastic enclosure materials is
greater than both steel and aluminum
The part of a replacement honeycomb core that must line up with the adjacent original is the
ribbon direction
How would a technician test a composite structure to determine if it is electrically bonded?
Use an ohmmeter to check resistance between the composite and surrounding aircraft structure
How do composite materials dissipate the electrical currents that result from a lightning strike?
A conductive mesh or layer is installed in the surface ply of the composite
Structural properties of composite laminates such as stiffness, dimensional stability, and strength depend on
the stacking sequence and orientation of the plies
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
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