prop. of materials

Question 1

physical (3)

Answer 1

density: amt of matter packed into given volume
porosity: measure of amt of voids or pores that material has
moisture content: amt of moisture present in structure of material

Question 2

strength

Answer 2

ability of material to withstand applied loads without failure

Question 3

hardness

Answer 3

ability of material to resist scratching, abrasion or indentation

Question 4

elasticity

Answer 4

ability of a material to return to its original shape and dimension after being subjected to a load

Question 5

stiffness

Answer 5

ability of material to resist elastic deformation under load

Question 6

plasticity

Answer 6

ability of a solid material to undergo some degree of permanent deformation without rupture

Question 7

WORKABILITY

Answer 7

workability: amount of deformation material undergoes without failure
malleability: can be hammered, rolled out into thin sheets
ductility: ability of material to undergo plastic deformation by extrusion or the application of tensile forces

Question 8

fatigue

Answer 8

tendency of material to break when subjected to repeated cyclic loading where the induced stress is well below the elastic limit

Question 9

toughness

Answer 9

amount of energy required to cause failure under certain specific conditions