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| Section | Weight | Objectives |
|---|---|---|
| Incident Investigation and Learning | 15% | - Learning and Improvement
|
| Process Safety Management Systems | 30% | - Operating Procedures and Safe Work Practices
|
| Risk Based Process Safety (RBPS) Fundamentals | 15% | - Process Safety Competency
|
| Hazard Identification and Risk Analysis | 25% | - Hazard Assessment Methods
|
| Measurement, Audit, and Continuous Improvement | 15% | - Audit and Assessment
|
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質問 # 111
A field operator contacted the control room about a leaking connection on a heat exchanger. The control room operator instructed the field operator to bypass the heat exchanger. However, unknown to the control room operator, additional piping had recently been installed upstream of the heat exchanger, and had not been recorded on the P & ID. When the field operator incorrectly opened a valve in the new piping, the process stream was routed to an unintended location.
Which of the following groups of Risk Based Process Safety elements, if properly implemented, could have prevented this incident?
正解：D
解説：
The best answer is C because the scenario shows three clear failures that align directly with these RBPS elements. First, the new upstream piping was not recorded on the P & ID , which is a failure of Process Knowledge Management (PKM) . CCPS identifies PKM as the element for developing, documenting, and maintaining accurate process safety information such as drawings and system knowledge. Second, the piping had been recently installed , so the change should have been formally reviewed, approved, documented, and communicated through Management of Change (MOC) . CCPS describes MOC as the system for recognizing changes, evaluating their hazards, authorizing them, and ensuring follow-up actions are completed. Third, the field operator incorrectly opened a valve , which points to inadequate Training and Performance Assurance -operators must be trained and shown capable of performing tasks correctly, especially when systems have changed.
The other options are weaker because Emergency Management is mainly for response, not prevention; Asset Integrity concerns equipment fitness and reliability, not undocumented configuration changes; and Safe Work Practices , while important, do not address the central failure as directly as PKM, MOC, and Training.
質問 # 112
Discuss the training needs for personnel who may be required to respond to a release of a hazardous substance within a chemical facility.
正解：C
解説：
The correct answer is C because CCPS emphasizes that personnel expected to respond to hazardous substance releases must receive comprehensive, competency-based training that integrates knowledge, skills, and practical application. Under the RBPS elements of Emergency Management and Training and Performance Assurance , responders must be prepared to act safely and effectively under high-stress conditions.
Training should include hazard recognition , such as understanding chemical toxicity, flammability, reactivity, and potential exposure routes. Personnel must be proficient in emergency procedures , including alarm response, evacuation, shelter-in-place, and escalation protocols. A critical component is hands-on training in the use of personal protective equipment (PPE) , including selection, inspection, proper donning/doffing, and limitations of equipment like respirators and chemical suits.
Additionally, CCPS highlights the importance of understanding the Incident Command System (ICS) to ensure coordinated response, clear roles, and effective communication. Responders should also be trained in spill control, isolation techniques, and monitoring equipment usage to assess conditions safely.
Regular drills and simulations are essential to reinforce learning and build confidence. Importantly, training must also stress personal safety, situational awareness, and decision-making , including recognizing when to withdraw and allow specialized teams to intervene.
質問 # 113
For a vapor explosion that occurs in a closed vessel, the amount of thermodynamic energy that ends up in the overpressure is approximately:
正解：B
解説：
The correct answer is B (50%) because in a closed or confined vessel , a much larger fraction of the released thermodynamic energy is converted into pressure (overpressure) compared to unconfined conditions.
CCPS explains that the degree of confinement and congestion strongly influences explosion severity. In an unconfined environment , only a small fraction of energy (typically 2-5%) contributes to overpressure because gases can expand freely. However, in a closed vessel , expansion is restricted, causing the energy released during combustion to be efficiently converted into pressure rise within the vessel .
This leads to significantly higher pressures, often approaching the adiabatic constant-volume explosion pressure , where a large portion of the energy contributes directly to overpressure. Values around 50% or higher are commonly used as engineering approximations for confined systems.
Options A (2%) applies to unconfined vapor cloud explosions, while C (17.5%) may apply to partially congested systems. Option D (0%) is incorrect since overpressure is the defining feature of an explosion.
CCPS highlights that confinement dramatically increases explosion severity , making proper design, relief systems, and hazard analysis critical for vessels handling flammable materials.
質問 # 114
Which of the following statements is correct pertaining to Process Safety Audits? (Select all that apply)
正解：B、C
解説：
The correct answers are A and B , as they align with CCPS guidance on the Process Safety Auditing element within RBPS.
A is correct because CCPS defines an audit as a systematic and independent evaluation used to verify whether process safety systems comply with internal standards, external regulations, and recognized good engineering practices (RAGAGEP) . Independence is critical to ensure objectivity and credibility of the audit findings.
B is also correct because CCPS allows and encourages the inclusion of facility representatives during second- and third-party audits . These individuals provide essential operational knowledge, clarify site-specific practices, and facilitate access to documents and personnel. However, they do not compromise independence as long as they do not control the audit outcome.
C is incorrect because findings and recommendations are distinct . Findings identify gaps or non- conformances, while recommendations propose corrective actions.
D is incorrect because audits staffed only with site personnel lack independence and may introduce bias.
CCPS stresses the importance of independent or external auditors , especially for higher-level or corporate audits.
Overall, effective audits are structured, objective, and supported by knowledgeable personnel while maintaining independence to ensure accurate evaluation of process safety performance.
質問 # 115
To maintain a dependable Operational Readiness practice (select all that apply):
正解：A、B、D
解説：
The correct answers are A, B, and D because CCPS defines Operational Readiness (often implemented through Pre-Startup Safety Reviews, PSSR) as a systematic and consistently applied process to ensure that facilities are safe to start or restart.
Option A (ensure consistent implementation) is critical because inconsistent application of readiness reviews can lead to missed hazards or incomplete verification , increasing risk during startup. CCPS stresses that the process must be standardized and applied every time applicable conditions arise.
Option B (involve competent personnel) is essential because readiness reviews require multidisciplinary expertise , including operations, engineering, maintenance, and safety professionals. Competent personnel ensure that all aspects of safety, procedures, and equipment are properly evaluated.
Option D (determine scope of readiness reviews) is also correct because clearly defining what changes or situations require a readiness review ensures that the process is applied appropriately and comprehensively.
Option C is incorrect because operational readiness should not be limited to only major changes ; it should also apply to minor changes, startups after shutdowns, and other relevant situations where safety could be impacted.
CCPS emphasizes that effective operational readiness ensures systems, procedures, and personnel are fully prepared before introducing hazards , preventing incidents during startup.
質問 # 116
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