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

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

Which of the following are generally characteristics 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) When performing a ring (coin tap) test on composite structures, a change in sound may be 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(tap) test.

- Which of these methods may be used to inspect fiberglass/honeycomb structures for entrapped water 1. Acoustic emission monitoring. 2. X-ray. 3. Backlighting.

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

When balsa wood is used to replace a damaged honeycomb core, the plug should be cut so that

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

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

How does acoustic emission testing detect defects composite materials?

What precaution, if any, should be taken to prevent corrosion inside a repaired metal honeycomb structure?

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

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

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

The length of time that a catalyzed resin will remain a workable state is called the

The classifcation for high tensile strength fiberglass used in aircraft structures is

Superficial scars, scratches, surface abrasion, or rain erosion on fiberglass laminates can generally be repaired by applying

The classification for fiberglass reinforcement mat that has high resistivity and is the most common in

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

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

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

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

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

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

Proper pre-preg composite lay-up curing is generally accomplished by 1. applying external heat. 2. room temperature expOsure. 3. adding a catalyst or curing agent to the resin. 4. applying pressure.

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

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

When necessary, what type of cutting fluid is usually acceptable for machining composite laminates?

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

Fiberglass damage that extends completely through laminated sandwich structure

Repairing advanced composites using materials are techniques traditionally used for fiberglass repairs likely to result in

The preferred way to make permanent repairs on composites is by

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

What is the material that is used in vacuum bagging that assures separation from the part being cured

What chemical is applied to molds and backing plates to ensure the release of a cured part?

What does the acronym "TC" stand for in regard to equipment used to repair composites?

Which direction of composite fabrics are consider to be the strongest?

Which degree is understood to be the warp direction of composite materials?

Which resin systems is typically used in composite repair and is less like to cause irritation and allergic reactions?