M-C 787

Where must the vacuum probes be installed?. They must be installed over the repair plies. They must be installed over the heat blanket. They must be installed over the breather material.

Pregunta 2 The different states as stages of the resins correspond to "A"-"B"- "C". What stage we must keep them in frozen state: "B" stage. "A" stage. "C" stage.

Pregunta 3 What is the purpose of the "Fabric Weave Style" in the fabrics?. To create the strength of the material for different loads. To form the tape. To support impact.

Pregunta 4 Nomex is a product derived from: Meta-aramid. Para-aramid. Polyacrylonitrile.

Pregunta 5 Concerning to the heat blankets: Are a rigid heater to cure the repair. Must be the same size of the repair. Must be between 2 to 4 inches larger than the repair.

Pregunta 6 The removal of paint before beginning a repair, we use the method of. Not necessary on damaged area. Chemical removal. Sanding.

Pregunta 7 The function of thixotropic agents like micro-balloons and aerosil is: to avoid the tendency to run off of the resins. to give high resistance. to have better adhesion.

Pregunta 8 The prepreg fiber cloth is at. Pre impregnation process wetting with a resin partially cured (B stage). Pre impregnation process without resins. Impregn of fiber cloth with solvent.

Pregunta 9 The main advantages of composites over conventional structure include. Requires lengthy repair time. Can vary designs to meet load. Mechanical properties affected by temp moisture.

Pregunta 10 The fiber with highest moisture absorption is. Carbon fiber. Glass fiber. Aramid fiber.

Pregunta 11 Seals, tires, silicon rubber, they are.... Elastomer. Thermoplastics. Thermosetting.

Pregunta 12 There are 4 different kinds of adhesives. Thermosetting GFRP, dispersion adhesives, resins adhesives. Polycarbonate, polyethylene, contact adhesive and glue. Contact, solvent, dispersion and resins adhesive.

Pregunta 13 How is the warp direction determined in the prepreg material?. It is determined in accordance with SRM. It is determined by the selvage edge. It is determined by a diamond pattern on parting film.

Pregunta 14 In components made of composites, what does monolithic area mean?. An area with Honeycomb core. An area with solid laminated (only plies). An area with only GFRP.

Pregunta 15 In what kind of structure can you use the RDC?. Any structure. Monolithic structure. Sandwich structure.

Pregunta 16 Which is the resin that resists the highest temperature?. The phenolic resin. The polyimide resin. The polyester resin.

Pregunta 17 Reheating of thermosetting resins: The resins can be reworked. Not reverse the chemical process. The resins are softened.

Pregunta 18 Proper selection of ply orientation in advanced composite materials is necessary to provide: Easy sanded. Low weight. Structurally efficient design.

Pregunta 19 Tap testing is widely used for a quick evaluation of accessible surfaces to detect: Delamination or disbonded. Lightning strike. Water ingestion.

Pregunta 20 About tools, special scissors must be used when we are cutting: Carbon fiber. Glass fabric. Kevlar fabric.

Pregunta 21 Surface wetting for bonding is very important to: to avoid corrosion between material. to have better mechanical hooking and durable joint. to avoid shear loads.

Pregunta 22 (Pregunta sin número explícito en la imagen original) The primary load carrying element are: The resin. The fiber. Filler.

Pregunta 23 (Pregunta sin número explícito en la imagen original) What is the factor to use when you prepare resin for the impregnation carbon fiber?. Weight of the fabric x 1.0. Weight of the fabric x 1.5. Weight of the fabric x 1.3.

Pregunta 24 (Pregunta sin número explícito en la imagen original) What is the difference between carbon fiber and graphite fiber? (Primera aparición). The carbon fiber contains 99% more carbon than the graphite fiber. The graphite fiber contains 99% more carbon than the carbon fiber. There is no difference.

Pregunta 25 The adhesive film, foam adhesive and pre-preg must be frozen to: -5°C. -18°C. -10°C.

Pregunta 26 (Pregunta sin número explícito en la imagen original) To make a repairing, how do we calculate the amount of resins to prepare (in weight): 100/60 resin / hardener. Is a constant weight for all resin. Knowing the weight of fiber to laminated.

Pregunta 27 (Pregunta sin número explícito en la imagen original) What is the importance of ply orientation when you make a repair on a composite structure?. To maintain low weight. To improve the aerodynamic conditions. To maintain load resistance.

Pregunta 28 (Pregunta sin número explícito en la imagen original) [Enunciado implícito por opciones: Tipo de curado/reacción al mezclar resinas]. Chemical reaction. Elastomer. No chemical reaction.

Pregunta 29 (Pregunta sin número explícito en la imagen original) The resins with more mechanical properties used in high tech. composites are: Elastomer. Polyesters. Epoxi resin.

Pregunta 30 (Pregunta sin número explícito en la imagen original) Which are the types of construction used in composite materials?. Monolithic and Sandwich. Fiberglass and Carbon fiber. Resin and Fibers.

Pregunta 31 (Pregunta sin número explícito en la imagen original) The word "composite" correspond to: Plastic sheet. Honeycomb. Acrylic plastic windows.

Pregunta 32 (Marcada como Pregunta 25 repetida en la imagen original) What is the difference between carbon fiber and graphite fiber? (Segunda aparición). The carbon fiber contains 99% more carbon than the graphite fiber. The graphite fiber contains 99% more carbon than the carbon fiber. There is no difference.