701-800

701. Which type of resin is not currently utilized on composite structures? (Level 2)

• a) Epoxy resins
• b) Thermoplastic resins
• c) Phenolic resins

702. Which factors have a positive effect on surface wetting? (Level 1)

• a) Removal of surface contamination, Viscosity reduction through application of heat, Time and pressure at the bonding point.
• b) Fingerprints left on adherent surfaces, Residues not removed from the adherent surfaces, Low temperatures, Incorrect or no surface pre-treatment.
• c) Removal of surface contamination, Time and pressure at the bonding point, Low temperatures

703. Which factors have a negative effect on surface wetting? (Level 1)

• a) Removal of surface contamination, Viscosity reduction through application of heat, Time and pressure at the bonding point.
• b) Fingerprints left on adherent surfaces, Residues not removed from the adherent surfaces, Low temperatures, Incorrect or no surface pre-treatment.
• c) Removal of surface contamination, Time and pressure at the bonding point, Low temperatures

704. Which type of damage is a skin not-perforated damage? (Level 2)

• a) Abrasion, Lightning strike, Delamination, Scratches, Dents, Holes, Gouges
• b) Abrasion, Debonding, Delamination, Nicks, Dents, Holes, Gouges
• c) Abrasion, Debonding, Delamination, Nicks, Dents, Gouges, Scratches

705. Which type of damage is a skin perforated damage (with damage of fibres)? (Level 2)

• a) Abrasion, Delamination, Scratches, Dents, Gouges
• b) Holes, Lightning strike, Impact by foreign object (FOD)
• c) Abrasion, Debonding, Delamination, Nicks, Dents, Gouges, Scratches

706. Which of the following statements is correct about Scratch damage? (Level 1)

• a) Scratch is damage to a surface caused by scuffing, rubbing or scraping of the component. Fibres are not damaged and mechanical performance is not affected.
• b) Scratch is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure
• c) Scratch is the result of contact with a sharp object and only surface fibres are affected and the edges are sharp

707. Which of the following statements is correct about Abrasion damage? (Level 1)

• a) Abrasion is damage to a surface caused by scuffing, rubbing or scraping of the component. Fibres are not damaged and mechanical performance is not affected.
• b) Abrasion is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure
• c) Abrasion is the result of contact with a sharp object and only surface fibres are affected and the edges are sharp

708. Which of the following statements is correct about Debonding damage? (Level 2)

• a) Debonding is damage to a surface caused by scuffing, rubbing or scraping of the component. Fibres are not damaged and mechanical performance is not affected.
• b) Debonding is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure
• c) Debonding is the result of contact with a sharp object and only surface fibres are affected and the edges are sharp

709. Which of the following statements is correct about Lightning Strike damage? (Level 1)

• a) The effect of a lightning strike depends on the material will not be the same. For non-conductive materials like Glass- and Aramid Fibre a large part of the component, if not completely protected, may be blown out because both skins are affected and the core generally vapourised due to the extreme heat
• b) Lightning strike is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure
• c) Lightning strike is when the separation of plies occurs in a multi-laminate material. This can be caused by the material being hit (impact delamination), or when there is a resin failure for any other reason.

710. Which of the following statements is correct about Delamination damage? (Level 2)

• a) Delamination is a deformity caused by extraneous forces, which are applied to the structure. This can be an impact (FOD) for example.
• b) Delamination is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure
• c) Delamination is when the separation of plies occurs in a multi-laminate material. This can be caused by the material being hit (impact delamination), or when there is a resin failure for any other reason.