Question $4(25$ marks$)$

a$)$ State the limitations of using Tribology analysis in predictive maintenance.

$(3$ marks$)$

b$)$ State three tribology techniques and explain their use in predictive maintenance.

$(9$ marks$)$

c$)$ Describe how the following tests are used to determine the quality of lubricating oil and state how the test results can impact on the maintenance of operating machinery.

i$.$ Contamination

ii$.$ Fuel Dilution

iii. Oxidation

iv$.$ Solids Content

v$.$ Nitration

$(10$ marks$)$

d$)$ What is wear particle analysis.

$(3$ marks$)$