Lubricant Sampling and Analysis Quiz

When storing lubricant drums outside, it is best to:

• Store vertically (with the top surface flat) in the open sunlight

• Store at an angle with the openings at the high and low positions

• Store horizontally and covered

• Cover them with a sheet of plywood

• Store them upside down directly on the ground

Lubricant shelf life limits:

• Are rigorously controlled by the manufacturer

• Get longer over time

• Are about 10 years

• Vary according to the type of lube and type of storage condition

• Can be stored indefinitely

Best practices for top-up oil containers could include:

• Closeable galvanized containers

• Dedicated and scalable containers, by oil type

• Any available container will be satisfactory

• Lubricants should be stored at the machinery location, regardless of the cleanliness

• Use a funnel which contains a screen in the bottom to catch contaminants

Lubricant refilling best practices should include which of the following:

• Use a filter cart to charge (fill) the system with oil, if possible

• Refill the equipment while it is operating and hot

• A funnel

• A funnel if it has been capped (or scaled)

• A sealed container with a tube for siphoning

A filter's differential pressure slowly increases over time. What's wrong?

• The filter has burst

• The filter bypass valve is open

• ISO particle counts should be taken

• Filter differential pressure does not increase

• Nothing, it's removing dirt

The benefit that is achieved with the use of a hard-piped sampling valve (mini-mess) is:

• Dead volume is minimized

• Flushing is easy to do

• Sampling is clean due to the threaded dust cap

• There is low risk of leakage

• All of the above

Which of the following contributes to poor quality and unreliable oil analysis data?

• Sampling from drain ports

• Sampling from cold systems

• Sampling after an oil change

• Sampling after a major top-up volume of oil has been added

• All of the above

Sampling a wet sump gearbox with a small oil circulation system should be done where?

• Downstream of the pump, upstream of the main pressure-line filter

• Downstream of the sump, upstream of the pump (before the pump)

• Downstream of the main pressure-line filter

• From the sump

• From the gearbox drain plug

Sampling for wear metals in a large multi-component circulating system with a reservoir should be done where?

• Downstream of the pump, upstream of the main pressure-line filter

• Downstream of the reservoir, upstream of the pump (before the pump)

• Downstream of the main pressure-line filter

• From the return line, downstream of the working parts

• From the reservoir

Oil samples from an off-line (kidney-loop) filtration circuit should be taken:

• Downstream of the pump, upstream of the filter

• Downstream of the reservoir, upstream of the pump (before the pump)

• Downstream of the filter

• From the sump

• From the drain plug