Chapter 04

What is a material?

• The combination of metals or of a metal and another element.

• A substance of which

  something is composed or made of.

• A substrate of which anything is composed.

• A combination of substances to build a product.

What are alloys?

• A combination of ferrous metals with non-ferrous elements.

• The combination of metallic bonding character.

• The combination of metals that are defined by a metallic bonding character.

• A combination of brass with pewter elements.

Which grade do Carbon Steels belong to?

• 1xxx

• 2xxx

• 3xxx

• 4xxx

What are the typical alloying elements of aluminum?

• Copper and magnesium

• Manganese and silicon

• Tin and zinc

• All of the above.

What is a typical composite of polymers and metals?

• Steel reinforced concrete

• Glass fibre reinforced polymer

• Steel cord tires

• Carbon fibres reinforced polymer

What is true for metals?

• Composed of one or more metallic elements

• Metals are inorganic and crystalline in nature

• Metallic element may combine with nonmetallic elements

• All of the above

Which one is not a material property type?

• Chemical properties

• Physical properties

• Mechanical properties

• Physiological properties

What is stress?

• Response of the material to deformation

• Pressure due to applied load tension, compression, shear, torsion, and their combination

• Property of a material which enables it to draw out into thin wires

• All of the above.

What are fatigue fractures?

• Property of breaking without much permanent distortion

• Permanent deformation due to continuous load

• Progressive minute cracks growing under the action of fluctuating stress

• All of the above.

What is the Young´s modulus?

• Power of coming back to its original position after deformation when the stress or load is removed

• Measuring the stiffness of a solid material in the linear elasticity regime of a uniaxial deformation

• Ability to undergo some degree of permanent deformation up to the yield point

• All of the above.