2. The vast majority of contaminant particles exist in what size range?
a.) >100 microns
b.) 50-75 microns
c.) 25-50
d.) 5-25 microns
e.) 0.1 to 5.0 microns

3. Which of the following technologies is capable of removing particles below 3 microns?
a.) Fine filtration
b.) Centrifuge
c.) Chemical additives
d.) ISOPur

4. What percent of wear (abrasion, erosion, fatigue) is particle induced?
a.) 10%
b.) 32%
c.) 57%
d.) 70%
e.) 82%

5. The ISO code measurement system does not measure particles below 4 microns because....
a.) It is not important to remove such small particles
b.) Until ISOPur, it was impossible to remove these particles
c.) It's expensive to run tests at this sensitivity level
d.) Both b and c
e.) None of the above

6. Which of the following technologies is capable of removing products of oxidation?
a.) Fine filtration
b.) Centrifuge
c.) Chemical additives
d.) ISOPur

7. True or false: ISOPur will continue to function, even when water content is high.

8. What is ingression?

9. How many times does water in oil increase the oxidation rate?
a.) 2 times
b.) 5 times
c.) 10 times
d.) More than 10 times

10. What is the science of the mechanisms of friction, lubrication, and wear of interacting surfaces that are in relative motion?
