QUESTION 33 The two fiber reinforment classifications are random and aligned ora

Question

QUESTION 33 The two fiber reinforment classifications are random and aligned orandom and continuous 2D and 3D continuous and discontinuous QUESTION 34 Uncured epoxy resin is toxic True False QUESTION 35 Spherodite steel would be considered what type of composite material? particle reinforced structural fiber reinforced not a composite material QUESTION 36 What combination of mechanical characteristics are optimized in typical composites? cost, tensile strength o ductility and strenth thermal and electrical conductivity strength, weight QUESTION 37 In the Boeing 787, approximately what percent by weight are carbon fiber structural components? 25 50 100 QUESTION 38 A composite material is made up of one or more types of materials True . False QUESTION 39 Cemented silicon carbide cutoff wheels would be considered what type of composite material? particle reinforced structural fiber reinforced not a composite material

Explanation / Answer

33. Continuous and discontinous. It is classified on the basis of continuous or discontinous fibre in the matrix.

34. true.  Epoxy resins in their uncured state are mostly classed as irritant to the eyes and skin, as well as toxic to aquatic organisms

35. particle reinforced.

36. ductility and strength. This mechanical property is improved in combination.

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