CMRP Lubrication Management 3

Question 1

Determining Remaining Useful Life (RUL) through oil analysis primarily enables a maintenance program to:

Accepted Answer

Optimize oil change intervals based on actual lubricant condition rather than fixed schedules

Answer

Calculate the total purchase cost of lubricants over the equipment life

Answer

Identify the specific bearing failure mode causing wear metal generation

Answer

Measure the flash point trend of in-service lubricant

Question 2

Which bearing failure mode is most directly caused by an inadequate lubricant film allowing metal-to-metal contact?

Accepted Answer

Adhesive wear and scuffing between rolling surfaces

Answer

Electrical fluting from stray shaft currents

Answer

False brinelling from vibration during standstill

Answer

Fretting corrosion from external micro-vibration

Question 3

Elevated water content detected in an in-service lubricant most commonly indicates:

Accepted Answer

Seal failure, cooling system leak, or atmospheric condensation ingress

Answer

A normal condition for water-cooled systems operating below 60°C

Answer

Excessive anti-wear additive concentration reacting with oxygen

Answer

Normal base oil oxidation producing water as a by-product only

Question 4

The lubrication program element most effective at preventing cross-contamination between incompatible lubricants in a facility is:

Accepted Answer

A color-coded lubricant identification and dedicated dispensing system

Answer

Requiring technicians to memorize lubricant specifications for each machine

Answer

Purchasing only one grade of oil for all equipment to eliminate mixing risk

Answer

Draining equipment completely before every re-lubrication event

Question 5

The recommended indoor storage practice for lubricant drums to maximize shelf life and prevent contamination is:

Accepted Answer

Store drums horizontally with bungs positioned at 3 and 9 o'clock in a cool, dry area

Answer

Store drums vertically outdoors exposed to temperature cycling

Answer

Store drums upright indoors with bungs loosened to allow pressure equalization

Answer

Rotate drum position quarterly regardless of remaining content

Question 6

In ferrographic or spectrometric oil analysis, elevated iron (Fe) levels are the primary indicator of:

Accepted Answer

Wear of steel components such as bearing races, gears, or shafts

Answer

Silica dirt contamination from a failed air filter

Answer

Corrosion of copper alloy bushings and thrust washers

Answer

Degradation of synthetic base stock polyol esters

Question 7

The four-ball wear test (ASTM D4172) is used to evaluate which lubricant property?

Accepted Answer

Anti-wear performance under sliding contact by measuring the wear scar diameter

Answer

Viscosity index stability across a four-temperature range

Answer

Oxidation resistance over a four-hour high-temperature test

Answer

Extreme pressure load-carrying capacity at the weld point