CRE Study Guide 2026
Everything you need to pass the CRE exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CRE Exam Format at a Glance
📚 CRE Topics to Study (69)
✍️ Sample CRE Questions & Answers
1. In reliability block diagrams, what is the reliability of two components with reliabilities R₁ = 0.9 and R₂ = 0.8 connected in series?
For series systems, system reliability is the product of component reliabilities: R_sys = 0.9 × 0.8 = 0.72.
2. In reliability testing, the term 'censored data' (or suspended data) refers to:
Censored (suspended) data represents test units that were removed or ended the test without experiencing a failure, providing partial life information.
3. In reliability testing, confidence intervals are used to:
Confidence intervals provide a range within which the true reliability parameter is expected to fall with a stated probability.
4. What is a key principle of reliability-centered maintenance (RCM)?
A key principle of Reliability-Centered Maintenance (RCM) is to determine the most cost-effective maintenance strategies for equipment based on its operational context and potential failure modes. RCM focuses on understanding the functions of assets and applying appropriate maintenance tasks (e.g., preventive, predictive, run-to-failure) to prevent functional failures. This approach optimizes maintenance resources and improves system reliability.
5. Which regulatory body enforces the Process Safety Management standard (29 CFR 1910.119) in the United States?
OSHA (Occupational Safety and Health Administration) promulgates and enforces 29 CFR 1910.119, the PSM standard.
6. A reliability engineer is drafting a Derating Analysis Report. What must be documented for each component to demonstrate compliance?
Derating reports must show both the applied stress (voltage, current, temperature, etc.) and the rated maximum, along with the calculated derating percentage compared to the program's derating criteria.