Asset Management Asset Maintenance and Reliability 1 — Questions and Answers
Question 1: What does 'MTBF' stand for in reliability engineering?
- Mean Time Between Failures (Correct answer)
- Maximum Time Before Failure
- Measured Time Between Functions
- Minimum Threshold Before Failure
Correct answer: Mean Time Between Failures
MTBF (Mean Time Between Failures) is the average elapsed time between repairable failures of a system or component during normal operation.
Question 2: Which maintenance strategy involves performing maintenance based on the actual condition of an asset rather than on a fixed schedule?
- Preventive maintenance
- Corrective maintenance
- Condition-based maintenance (Correct answer)
- Run-to-failure maintenance
Correct answer: Condition-based maintenance
Condition-based maintenance (CBM) uses real-time monitoring data such as vibration or temperature readings to trigger maintenance only when an asset's condition warrants it.
Question 3: What is the primary goal of Reliability-Centered Maintenance (RCM)?
- To minimize the number of maintenance technicians needed
- To determine the most effective maintenance approach for each asset function (Correct answer)
- To eliminate all unplanned downtime completely
- To maximize the frequency of scheduled maintenance intervals
Correct answer: To determine the most effective maintenance approach for each asset function
RCM analyzes each asset's functions and failure modes to identify the most appropriate and cost-effective maintenance strategy for each function.
Question 4: What does 'OEE' measure in asset and operations management?
- Overall Equipment Effectiveness (Correct answer)
- Operational Efficiency Estimate
- Original Equipment Evaluation
- Optimal Energy Expenditure
Correct answer: Overall Equipment Effectiveness
OEE (Overall Equipment Effectiveness) measures the percentage of manufacturing time that is truly productive by combining availability, performance, and quality metrics.
Question 5: Which type of maintenance is performed AFTER an asset has already failed?
- Predictive maintenance
- Preventive maintenance
- Corrective maintenance (Correct answer)
- Proactive maintenance
Correct answer: Corrective maintenance
Corrective maintenance (also called reactive maintenance) is performed after a failure occurs to restore an asset to its fully functional state.
Question 6: What does 'MTTR' measure in asset reliability management?
- Maximum Time To Repair
- Mean Time To Repair or Restore (Correct answer)
- Minimum Threshold for Tracking Repairs
- Measured Time for Technical Review
Correct answer: Mean Time To Repair or Restore
MTTR (Mean Time To Repair or Restore) is the average time required to repair a failed component or system and return it to operational status.
Question 7: In the 'bathtub curve' model of reliability, what does the right-side upward slope represent?
- Infant mortality failures from manufacturing defects
- Random failure period with constant failure rate
- Wear-out failures due to aging and deterioration (Correct answer)
- Burn-in failures from initial deployment
Correct answer: Wear-out failures due to aging and deterioration
The right side of the bathtub curve represents the wear-out phase, where failure rates increase as components age, fatigue, and deteriorate over time.
Asset Management Asset Maintenance and Reliability 1
What does 'MTBF' stand for in reliability engineering?