MAE 3324 CH1

Question 1

What are the six properties of materials?

Answer 1

1. Mechanical
2. Electrical
3. Thermal
4. Magnetic
5. Optical
6. Chemical

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Question 2

What is thermal conductivity?

Answer 2

The ability of a material to conduct heat.

Question 3

T or F

Increasing the impurity content in a material decreases the thermal conductivity?

Answer 3

True

Question 4

T or F

Materials with a high degree of crystalline perfection are usually optically transparent?

Answer 4

True

Question 5

T or F

Materials with many small grains (polycrystalline) are optically transparent?

Answer 5

False, materials of this kind are optically translucent.

Question 6

T or F

Materials having some porosity are usually opaque?

Answer 6

True

Question 7

What are the three classifications of materials in terms of chemistry?

Answer 7

1. Metals
2. Ceramic
3. Polymers.