CRL CRL - Certified Reliability Leader Risk Management and Criticality Analysis Questions and Answers 2 — Questions and Answers
Question 1: Which tool is most commonly used to map the logical relationships between failure events leading to a top-level undesired event?
- Fault Tree Analysis (FTA) (Correct answer)
- FMEA
- Pareto Chart
- P-F Curve
Correct answer: Fault Tree Analysis (FTA)
Fault Tree Analysis (FTA) uses a top-down logic diagram to map combinations of events and conditions that can cause a specified top-level failure.
Question 2: The P-F interval in condition-based maintenance represents:
- The time between the point of potential failure detection and functional failure (Correct answer)
- The interval between preventive maintenance tasks
- The period between production runs
- The time required to procure spare parts
Correct answer: The time between the point of potential failure detection and functional failure
The P-F interval is the time window between when a potential failure can be detected (P) and when functional failure (F) occurs, defining the inspection frequency needed.
Question 3: Run-to-failure (RTF) is an appropriate maintenance strategy when:
- Failure consequences are low and repair costs are less than prevention costs (Correct answer)
- Equipment is safety-critical
- Spares are difficult to obtain
- Equipment has a long P-F interval
Correct answer: Failure consequences are low and repair costs are less than prevention costs
RTF is justified only when failure has no safety or significant production consequences and the cost of prevention exceeds the cost of failure.
Question 4: A bow-tie analysis in risk management combines which two tools?
- Fault Tree Analysis (FTA) and Event Tree Analysis (ETA) (Correct answer)
- FMEA and Pareto Analysis
- RCM and FMECA
- P-F Curve and Criticality Matrix
Correct answer: Fault Tree Analysis (FTA) and Event Tree Analysis (ETA)
Bow-tie analysis integrates FTA (left side, causes) with ETA (right side, consequences) centered on the critical hazard event.
Question 5: Which risk mitigation strategy involves adding backup equipment to reduce the impact of a failure?
- Redundancy (Correct answer)
- Elimination
- Substitution
- Administrative controls
Correct answer: Redundancy
Redundancy provides a backup system or component that takes over if the primary fails, reducing the operational consequence of the failure.
Question 6: In the hierarchy of controls for risk mitigation, which approach provides the highest level of protection?
- Elimination (Correct answer)
- Engineering controls
- Administrative controls
- Personal protective equipment (PPE)
Correct answer: Elimination
Elimination — removing the hazard entirely — provides the highest level of protection because it removes the risk at its source.
CRL CRL - Certified Reliability Leader Risk Management and Criticality Analysis Questions and Answers 2
Which tool is most commonly used to map the logical relationships between failure events leading to a top-level undesired event?