Manufacturing

A computer processor can become extremely hot and must be cooled. A heat sink is placed on top of the processor to extract its heat. What material should the heat sink be made from?

• Composite

• Metal

• Plastic

• Ceramic

Carbon fiber has weak compression strength, but is relatively high in ______________________ strength, because it cannot be easily pulled apart.

• tensile

• creep

• fracture

• hardness

Concrete is exceptionally high in compression strength but relatively weak in _______________ strength, because it can easily be pulled apart.

• tensile

• creep

• fracture

• hardness

When selecting a material for use in a product, each material has advantages and disadvantages. One must view the qualities of each material and make compromises as they design the final product. This compromise is known as a

• trade-off

• desired result.

• undesired result.

• manufacturing process.

Two liter plastic bottles can be melted and reshaped. They are an example of what type of plastic?

• Thermoset

• Thermoplastic

• Nylon

• Polystyrene

Fiberglass is a combination of fiber and resin. This combination would be an example of what type of material?

• Composite

• Semiconductor

• Metal

• Ceramic

The ability of a material to resist various kinds of rapidly changing stresses is known as:

• fatigue strength.

• creep strength

• hardness.

• tensile strength.

All are examples of ceramics EXCEPT:

• glass.

• tungsten carbide.

• .clay.

• titanium.

When a spacecraft reenters the atmosphere, friction causes an intense amount of heat on the outer skin. What heat-resistant material would be good to protect the spacecraft while reentering?

• Ceramic

• Semiconductor

• Metal

• Plastic

All are properties of metal except:

• Can be polished to lustrous finish

• Low density

• Malleable

• Good conductor of electricity