CMRP Lubrication Management 2

Question 1

An ISO cleanliness code reported as 16/14/11 for a hydraulic fluid describes:

Accepted Answer

Particle count ranges per milliliter at 4, 6, and 14 micron size thresholds

Answer

Lubricant viscosity at 40°C, 100°C, and flash point respectively

Answer

Water, fuel, and acid contamination levels

Answer

Percentage of additive depletion at three service intervals

Question 2

The primary benefit of an oil analysis program in a reliability-centered maintenance strategy is to:

Accepted Answer

Monitor lubricant condition and wear metal trends to enable condition-based maintenance

Answer

Determine the exact color grade of the lubricant in service

Answer

Schedule all oil changes on a fixed 3-month calendar interval

Answer

Replace lubricants annually regardless of equipment condition

Question 3

Which lubricant additive category forms a protective film on metal surfaces to prevent rust and corrosion from water and acidic contaminants?

Accepted Answer

Rust and corrosion inhibitors

Answer

Viscosity index improvers

Answer

Anti-wear (AW) additives

Answer

Pour point depressants

Question 4

Over-greasing a rolling element bearing most commonly leads to:

Accepted Answer

Excessive heat generation from grease churning and bearing failure

Answer

Insufficient lubrication film between rolling elements

Answer

Improved sealing against external contamination

Answer

Accelerated additive depletion without heat increase

Question 5

Kinematic viscosity of a lubricating oil, measured in centistokes (cSt), represents:

Accepted Answer

The oil's resistance to flow under gravity at a specified temperature

Answer

The oil's resistance to oxidation at elevated temperature

Answer

The concentration of anti-wear additives in parts per million

Answer

The flash point temperature divided by the oil's density

Question 6

Oil mist lubrication is the preferred delivery method for high-speed, lightly loaded rolling element bearings primarily because it:

Accepted Answer

Delivers minimal oil quantity, reducing churning losses and heat generation

Answer

Provides the thickest possible lubricant film at all loads

Answer

Allows grease to be applied without stopping the equipment

Answer

Eliminates the need for lubricant filtration systems

Question 7

A steadily increasing Total Acid Number (TAN) trend in sequential oil samples most likely indicates:

Accepted Answer

Ongoing oil oxidation and progressive additive depletion

Answer

Improved base oil refining and additive performance

Answer

Decreasing water content as condensation evaporates

Answer

Higher base oil viscosity from thermal polymerization only