Lubrication Management Flashcards
7 cards from real CMRP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Lubrication Management flashcards as text
Determining Remaining Useful Life (RUL) through oil analysis primarily enables a maintenance program to:
Answer: Optimize oil change intervals based on actual lubricant condition rather than fixed schedules
RUL assessment uses trended oil analysis data to determine how much longer oil can safely remain in service, enabling condition-based oil changes that reduce waste and cost.
Which bearing failure mode is most directly caused by an inadequate lubricant film allowing metal-to-metal contact?
Answer: Adhesive wear and scuffing between rolling surfaces
When the lubricant film is insufficient to fully separate surfaces, micro-asperities on opposing metal surfaces contact, weld, and shear, producing adhesive wear and scuffing damage.
Elevated water content detected in an in-service lubricant most commonly indicates:
Answer: Seal failure, cooling system leak, or atmospheric condensation ingress
Water in a closed lubrication system originates from seal failures, heat exchanger leaks, or condensation — all abnormal conditions requiring prompt root cause investigation.
The lubrication program element most effective at preventing cross-contamination between incompatible lubricants in a facility is:
Answer: A color-coded lubricant identification and dedicated dispensing system
Color-coded identification systems assign a unique color to each lubricant type with matching dispensing tools, providing a visual barrier that prevents human-error-driven cross-contamination.
The recommended indoor storage practice for lubricant drums to maximize shelf life and prevent contamination is:
Answer: Store drums horizontally with bungs positioned at 3 and 9 o'clock in a cool, dry area
Horizontal storage with bungs at 3 and 9 o'clock keeps both bungs submerged in oil, preventing the breathing action that draws airborne moisture and contaminants into the drum as temperatures fluctuate.
In ferrographic or spectrometric oil analysis, elevated iron (Fe) levels are the primary indicator of:
Answer: Wear of steel components such as bearing races, gears, or shafts
Iron is the dominant element in bearing steel, gear steel, and shaft materials, so elevated Fe in oil analysis directly signals wear of these steel components.
The four-ball wear test (ASTM D4172) is used to evaluate which lubricant property?
Answer: Anti-wear performance under sliding contact by measuring the wear scar diameter
The four-ball wear test rotates one steel ball against three stationary balls under a specified load and speed, measuring the resulting wear scar diameter to quantify anti-wear film effectiveness.