Lubrication and Maintenance Quiz

The primary reason that machinery is replaced is due to:

• Erosion

• Accidents

• Obsolescence

• Surface degradation of the metal

• Corrosion

Which of the following is not a lubrication regime (mode / type)?

• Boundary

• Elastohydrodynamic

• Boundarydynamic

• Hydrodynamic

• Mixed film

Which maintenance strategy is based strictly on tasks performed at specific time intervals?

• Proactive

• Predictive

• Preventive

• Percussive

• Reactive

Condition-based maintenance:

• is based on the condition of the equipment and the early detection of faults

• is based on regular time-based overhauls

• Is based on run to failure

• is based on the condition of the oil and other root causes

• Answers a and d

The Pareto Principle (80/20 Rule) states:

• The largest beneficial effect is obtained from a critical few maintenance tasks

• The largest beneficial effect is obtained from the (random) many maintenance tasks

• All machines die sometime

• All bearings live forever

• 80 percent of the people do 20 percent of the work

Which of the following is not a function of the lubricant?

• Cool surfaces

• Separate surfaces

• Prevent corrosion

• Repair surfaces

• Provide some scaling

Which type or form of lubrication is considered to provide a full fluid (oil) film?

• Elastohydrodynamic

• Solid Film

• Boundary

• Mixed

Elastohydrodynamic lubrication (EHL) is considered to occur primarily in:

• Piston rings and liners

• Journal bearings

• Rolling bearings, gears and cams

• Slow-moving pins and bushings

• Worm gears

The oil film thickness (or dynamic operating clearance) in operating bearings:

• Cannot be determined

• Is about 10 microns for journal bearings (although can vary considerably)

• Is about a micron for rolling bearings

• Is not measurable

• Answers b&c

Which is not a type of base oil (base stock)?

• Mineral

• Synthetic

• Antioxidant

• Vegetable

• Group III synthetic