MST Chp 1

What is included in material science?

• Study structure-property relationship

• Develop new material

• Predict the life of a material

• All of the above

On what basis material is selected for a space shuttle engine?

• Properties

• Low Cost

• Easy Availability

• Appearance

Time dependent deformation under constant load at elevated temperature is called

• Creep

• Fatigue

• Yield stress

• Elastic limit

The point at which plastic deformation starts is called

• Creep

• Fatigue

• Yield point

• Elastic limit

Stress is directly proportional to strain up to

• Fracture point

• Ultimate tensile stress

• Yield stress

• Elastic limit

Failure of a material under repeated alternating load below its ultimate strength is called

• Creep

• Fatigue

• Yield stress

• Elastic limit

If a solid material does not have free electrons, it will be a good

• Thermal conductor

• Thermal insulator

The amount of heat required to raise the temperature of unit mass of substance by unit degree is called

• Thermal conductivity

• Thermal expansion

• Specific heat

• Thermal insulation

For measuring tools, the coefficient of thermal expansion must be

• Low

• High

The deformation under external force is called

• Stress

• Strain