Composite Pre Test

What is a composite material?

• A material made from two or more distinct constituent materials

• A material found only in nature

• A material made from a single constituent material

• A synthetic material with no natural components

Which of the following is an example of a natural composite material?

• Steel

• Aluminum

• Wood

• Plastic

What is the dispersed phase in a composite material usually responsible for?

• Providing color to the material

• Reducing the cost of the material

• Providing the desirable material properties like high strength

• Holding the composite together

Which of the following is NOT a type of matrix material in composites?

• Polymer

• Ceramic

• Metal

• Glass

What is the most basic form of fiber reinforcement in composites?

• Randomly oriented fibers

• Unidirectional tape

• Braided fibers

• Woven fabric

What is the diameter of a typical fiber used in composites?

• 1 micron

• 10 microns

• 1 millimeter

• 100 microns

What property do fiber-reinforced materials exhibit when fibers are all running in the same direction?

• Heterogeneity

• Anisotropy

• Isotropy

• Homogeneity

Which manufacturing method involves winding resin-impregnated tape around a mandrel?

• Wet layup

• Injection moulding

• Pre-preg

• Filament winding

What is a significant advantage of fiber-reinforced composites?

• High thermal conductivity

• Poor corrosion resistance

• High cost

• Unbelievable strength-to-weight ratios

What limits the maximum temperatures at which polymer-matrix composites can be used?

• The cost of the materials

• The color of the composite

• The breakdown of the polymer matrix at high temperatures

• The melting point of the fibers