1) Boundary lubrication: a) Occurs if two surfaces are completely separated by l

ID: 44644 • Letter: 1

Question

1) Boundary lubrication:

a) Occurs if two surfaces are completely separated by lubricant

b) Occurs at low loads and high sliding speeds

c) Is a result of bone fracture

d) Lowers friction and reduces wear to zero

e) Lowers friction and reduces wear without entirely eliminating it

2) Hydrodynamic lubrication:

a) Results in complete separation of the two sliding surfaces by a film of lubricant

b) Occurs at high loads and low sliding speeds

c) Is desirable because it causes turbulence

d) Is the lubrication mechanism in total hip prosthesis

e) Can only occur if the surfaces are very smooth

1) e lowers friction and reduces wear without entirely eliminating it

2) a Results in complete separation of the two sliding surfaces by a film of lubricant

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