Examen de ciencias

and attach a safety harness when you work on high sections. A fall can injure or kill you. Remove. Lock. wear.

Which company was the first to use a carbon spoiler and the first to use Nomex honeycomb on their aircraft?. Airbus. Boeing. EMBRAER.

What happens if damage has ocurred to the core materials of a sandwich structure?. The damaged core materials must be removed first. b. The damaged core materials must be analized first. The damaged core materials must be repaired first.

How is the bonding material that completely surrounds the fiber to give strenght and transfer stresses to the fibers called?. Matrix. Caddling. Cable jacket.

A union that can be easily disassembled. cure. breakable joint. barrier coating.

How is the aromatic polymide fiber (ARAMID) known as?. Graphite. Fiberglass. Kevlar.

What is a void?. Dimensional distortion in a plastic object. Materials, such as water and alcohol, in a sizing or resin formulation, that are capable of being driven off as a vapor at room temperature. An empty area in the composite.

What is the definition for "batch" or "lot"?. a layer of material used during the manufacture or repair of a part to allow entrapped air and resin to escape. a 45 degree angle to the warp threads. Fabric can be formed into contoured shapes by using it. Material that was made with the same process at the same time having identical characteristics throughout.

Do not. the test solution enter joints or go below rivet heads. The test solution can cause corrosion. Get. Let. Cut.

the area adjacent to the damage with the masking paper and masking tape. Cover. Cut. Fix.

Is Adobe the oldest manmade building material?. No. Yes.

Once the fabric is impregnated with resin, the _ placed over it, the patches can be cut out with a utility knife. Plastic marked sheet. maked plastic sheet. sheet marked of plastic.

This is a period of time within which a joint that must be sealed, must be riveted, bolted or temporarily fastened. Work life. Cure. Leak path.

What is the most simple composite is composed of two elements: The structure itself and any kind of liquids. Matrix and reinforcing material. Technology and solids.

Do not _ edge or wax the slats in the unpainted areas of the leading edge. smooth. Polish. Mixed.

What agents can be used for cleaning dust, grease and mold release agents from composite components?. Isopropyl Alcohol. MEK, Ethyl, keytone. Acetone.

Locates flaws by temperature variations at the surface of a damaged part. Laser holography. Thermography. Ultrasonic inspection.

35. These fibers are used where a high temperature application is needed. Ceramics. Boron. both are correct.

31. Excessive weight should not be added by applying excessive resin material. TRUE. FALSE.

Pre-preg fabrics are manufactured to eliminate the mixing, applying and worry about the whether the proper mix ratio was used or if the proper amount of resin was applied. True. false.

The side of the fabric where the greatest number of yarns are parallel to the selvage edge: Warp face. Warpage. Warp direction.

What is the correct definition for "Aspect ratio"?. a. the weight for a fiber reinforcement per unit area (width x length). The ratio of length to diameter of a reinforcing fiber. large vessel used to cure laminates and bonded parts.

Small spheres of plastic or glass: Fillers. Chopped fibers and flox. microballons.

The threads that are designed as 90 degrees are: Warp. Weft. Selvage edge.

Do not give as much strength to the composite structure as refitting the hole with a new core. Filling the core with resin?microballoon mixture will add weight and decrease the flexibility of the part. composite skin repair. mechanically fastened repairs with pre-cured patches. Potted repair.

Which of the following has the greatest strength-to-weight ratio?. Foam. Honeycomb.

48. What is it necessary when working with any resins or solvents?. Space. glass. proper ventilation.

Some resins are made for laminating, so they are not generally thinner, and cannot be worked into the fibers. True. false.

The threads which run the length of the fabric as it comes off the bolt are referred to as: BIAS. Warp. Weft.

Which manual Will give the style of fabric required for repair work?. SRM. AMM. CML.

The área in the direction of the scratch. Do not use a circular motion. Make sure You remove all the rough surfaces. Clean. Work. Mek.

Fiberglass. small strands of Molten silica glass which are then spun together and woven into cloth. Is made from. Plastic. Matrix.

Graphite/epoxy_ surfaces and spoilers. Is used. Matrix. Kevlar.

How many common types of reinforcing fibers are there ?. 5. 3. 2.

Resins come in diferent forms: True. False.

What kind of test may manufacturer's require to detect oil or Grease contamination?. Water break test. Clean with mek. Acetone.

This term refers to the application of a brushing thickness sealant over a joint. Fillet or bread. Leak path. Cure.

Chopped fibers that are compressed together are often called: Mats. Filler. Fiberglass.