Practice Test Geeks(CCST) Certified Control Systems Technician Practice Test
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Safety Standards & Regulatory Compliance in Control Systems Flashcards

7 cards from real CCST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. A safety instrumented function must achieve a PFD of 0.01 to 0.001. What SIL level does this correspond to?

    Answer: SIL 2

    SIL 2 corresponds to a PFD range of 0.01 to 0.001 (RRF of 100 to 1,000) per IEC 61508/61511.

  2. Under the EPA Risk Management Program (RMP), what is required for Program 3 processes that is NOT required for Program 2?

    Answer: Process hazard analysis

    Program 3 requires a full process hazard analysis (PHA) using recognized methods such as HAZOP, whereas Program 2 uses a simplified hazard review.

  3. What is the key distinction between a Safety Instrumented Function (SIF) and a Basic Process Control System (BPCS) function?

    Answer: A SIF is independent of the BPCS and activates on demand to bring the process to a safe state

    A SIF is an independent safety layer that activates on demand to achieve or maintain a safe process state, separate from normal process control.

  4. In hazardous area classification, what does Zone 1 indicate under IEC 60079-10-1?

    Answer: An area where explosive gas atmosphere is likely to occur in normal operation

    Zone 1 is defined as an area in which an explosive gas atmosphere is likely to occur in normal operation.

  5. Which document type is used to formally record a bypass of a safety instrumented function and track its status?

    Answer: Safety Bypass Override Authorization (SBOA)

    A Safety Bypass Override Authorization (or similar site-specific form) formally tracks SIF bypasses, approvals, duration limits, and compensating measures.

  6. What is the purpose of a Proof Test in the context of SIS maintenance per IEC 61511?

    Answer: To detect dangerous undetected failures and restore the SIF to its required PFD

    Proof testing detects dangerous undetected (DU) failures in the SIF and restores the PFD to its design target by confirming the safety function will operate on demand.

  7. Under OSHA's Mechanical Integrity element of PSM, which of the following is a required activity?

    Answer: Written procedures for maintaining the ongoing integrity of process equipment

    OSHA PSM requires employers to establish and implement written procedures to maintain ongoing integrity of process equipment covered by the standard.