Safety Systems & Standards Flashcards
7 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safety Systems & Standards flashcards as text
What is the purpose of a 'pre-startup safety review' (PSSR) before bringing a new or modified process online?
Answer: To verify that construction is complete, safety systems are functional, and procedures and training are in place before startup
A PSSR confirms that all construction, safety devices, procedures, and training meet design requirements and PSM standards before a new or significantly modified process is started.
In fire triangle terminology, which three elements must be present simultaneously for combustion to occur?
Answer: Fuel, heat (ignition source), and oxygen
Combustion requires the simultaneous presence of fuel, a heat or ignition source, and oxygen — removing any one element will extinguish or prevent fire.
What does the term 'dispersion modeling' refer to in process safety emergency planning?
Answer: Predicting the atmospheric spread and concentration of released hazardous materials under various weather conditions
Dispersion modeling uses computational tools to predict how a released gas or vapor cloud will spread through the atmosphere, informing emergency response planning and evacuation zones.
What is the role of a 'safety instrumented system (SIS)' independent layer of protection relative to the Basic Process Control System (BPCS)?
Answer: The SIS must be independent of the BPCS to prevent a common cause failure from defeating both systems
IEC 61511 requires the SIS to be independent from the BPCS so that a single failure cannot simultaneously defeat both the process control and the safety protection layers.
Which of the following best describes a 'Quantitative Risk Assessment' (QRA) in process safety?
Answer: A numerical analysis that estimates the frequency and consequences of potential incident scenarios to calculate risk levels
A QRA uses numerical methods to estimate incident frequencies, model consequences, and calculate risk metrics such as individual risk and societal risk for decision-making.
In chemical process facilities, what does 'toxic release inventory' (TRI) reporting require under the EPA Emergency Planning and Community Right-to-Know Act (EPCRA)?
Answer: Annual reporting of listed toxic chemical releases and transfers to the environment above threshold quantities
Under EPCRA Section 313, facilities must annually report releases and transfers of listed toxic chemicals above threshold quantities to the EPA TRI program.
What is the significance of a 'Safety Data Sheet' (SDS) Section 7 for process technicians?
Answer: It provides information on handling and storage requirements to safely manage the chemical
SDS Section 7 (Handling and Storage) provides specific guidance on safe handling practices, storage conditions, and incompatibilities critical for process technicians managing chemicals.