Contamination

How large is a micron

• 0.001 mm

• 0.000001 mm

• 0.00039"

• 0.0001 mm

Answer explanation

A micron or micrometer. One micrometer is 1 millionth of a meter or 39 millionths of an inch

Hydraulic systems are contaminated by?

• built in contamination

• ingress contamination

• self generated contamination

• all of the above

• none of the above

Beta 100 has an efficiency of?

• 100%

• 99%

• 50%

• 99.9%

Answer explanation

A 100 mesh inlet filter will block particles upto what size?

• 100 micron

• 50 micron

• 150 micron

• 10 micron

Draw 3 body abrasion

Answer explanation

Critical clearance areas in gear pumps are?

Answer explanation

- Tooth to tooth

- Bearings

-Tooth to case

50% of surface degradation is from?

• Mechanical wear

• Abrasion

• Fatigue

• Corrosion

Answer explanation

Define contamination

Answer explanation

Contamination is any foreign material found in a hydraulic fluid that has a harmful effect of the fluid performance in a system.

If a fluid sample must be representative of the contamination level that exists within the system under actual operating conditions - what kind of sampling would be taken?

• Laminar

• Turbulent

• Static

• Dynamic

A contaminant particle analysis is conducted with the folowing results (1mL sample)

- Number of particles above 4 micron equals 11,400

- Number of particles above 6 micron equals 4,200

- Number of particles above 14 micron equals 110

What is the ISO code for this sample

Answer explanation

21/19/14