Maintenance and Reliability Flashcards
7 cards from real CPM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Maintenance and Reliability flashcards as text
The 'bath-tub curve' in reliability engineering illustrates that failure rates are typically highest during:
Answer: Early life and wear-out periods
The bathtub curve shows elevated failure rates during the early-life (infant mortality) phase and the end-of-life (wear-out) phase, with lower rates during the useful life period.
Which lubrication practice is most likely to cause premature bearing failure?
Answer: Over-greasing a sealed bearing
Over-greasing a sealed bearing creates excessive internal pressure and heat buildup, leading to seal damage and premature bearing failure.
A maintenance supervisor notices that 80% of equipment failures are caused by 20% of the asset population. This observation is an example of applying:
Answer: The Pareto principle
The Pareto principle (80/20 rule) is widely applied in maintenance to identify the 'vital few' assets or failure modes that account for the majority of problems.
In Total Productive Maintenance (TPM), 'autonomous maintenance' refers to:
Answer: Operators performing basic maintenance tasks on their own equipment
Autonomous maintenance is a TPM pillar that trains and empowers equipment operators to perform cleaning, inspection, lubrication, and minor adjustments on their machines.
Oil analysis as a predictive maintenance technique is MOST effective for detecting:
Answer: Internal wear and contamination in rotating machinery
Oil analysis detects wear particles, contaminants, and changes in lubricant properties that indicate internal component degradation in gearboxes, engines, and hydraulic systems.
A maintenance strategy that allows non-critical assets to operate until failure before performing repairs is called:
Answer: Run-to-failure (RTF) maintenance
Run-to-failure is a deliberate strategy applied to non-critical, easily replaceable assets where the cost of prevention exceeds the cost of failure and replacement.
Which of the following best describes 'inherent reliability' of equipment?
Answer: The reliability designed and built into the equipment by its manufacturer
Inherent reliability is the maximum reliability a piece of equipment can achieve given its design and manufacturing; it sets the ceiling that maintenance programs cannot exceed.