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. Which standard provides cybersecurity guidance specifically for industrial automation and control systems (IACS)?

    Answer: Both IEC 62443 and ISA-99 (they are the same standard series)

    IEC 62443 and ISA-99 are the same standard series—ISA-99 was the original designation, later adopted and renumbered as IEC 62443.

  2. What is the difference between a SIL Capability and a SIL Claim Limit in IEC 61508?

    Answer: Capability is the maximum SIL a subsystem can support; Claim Limit is the maximum credit claimable for risk reduction

    SIL Capability is the maximum SIL a subsystem's hardware can support, while SIL Claim Limit is the maximum risk reduction credit that can be claimed for a single protection layer.

  3. A control systems technician discovers that a pressure transmitter feeding a SIS has drifted beyond its calibration tolerance. What is the correct immediate action?

    Answer: Initiate a bypass of the affected SIF, apply compensating measures, and follow the site bypass management procedure

    A failed SIS sensor requires initiating a formal bypass, implementing compensating measures (such as increased operator monitoring), and following the site's bypass management procedure.

  4. In the context of the OSHA PSM Hot Work Permit element, which location always requires a hot work permit?

    Answer: Any location within the process area covered by PSM

    OSHA PSM requires a hot work permit for any hot work operation conducted on or near a covered process to prevent ignition of flammable releases.

  5. Which architectural constraint in IEC 61508 defines the minimum hardware fault tolerance (HFT) based on the safe failure fraction (SFF)?

    Answer: Architecture Constraints Table

    The Architecture Constraints Table in IEC 61508 specifies the minimum HFT required to achieve a given SIL based on the subsystem's SFF.

  6. What is the primary goal of Inherently Safer Design (ISD) in process safety management?

    Answer: Eliminate or reduce hazards at the source rather than controlling them with add-on safeguards

    ISD focuses on eliminating or substantially reducing hazards by changing the process itself—using less hazardous materials, smaller inventories, or milder conditions.

  7. Under IEC 61511, what is the required minimum independence between the SIS and the BPCS?

    Answer: The required independence depends on the SIL of the safety function

    IEC 61511 states that the required independence between SIS and BPCS depends on the SIL of the safety instrumented function being implemented.