A plant has a critical process that cannot tolerate more than 500 ms of downtime. The current PLC has a mean time to repair (MTTR) of 2 hours. The engineer is considering two options: (A) a redundant PLC pair with automatic failover, or (B) a hot-standby PLC with manual switchover. Which option meets the downtime requirement?

Option A, because automatic failover can switch in milliseconds.

Option B, because manual switchover is faster than automatic.

Neither option meets the requirement because any switchover takes too long.

Both options meet the requirement because the MTTR is 2 hours.

A chemical plant operator needs to monitor and adjust a batch reactor's temperature profile from a control room. The reactor is controlled by a PLC that communicates over a proprietary fieldbus. The operator currently has no visibility into the process. Which solution provides the operator with the required visibility and control while minimizing changes to the existing field-level wiring?

Replace the PLC with a DCS controller that includes a built-in operator display.

Install an HMI that connects to the PLC via the fieldbus and displays the temperature profile with setpoint adjustment capability.

Add a historian server that logs temperature data and allows the operator to view historical trends.

Connect a laptop directly to the temperature sensor to read values and manually adjust the heating element.

A technician is commissioning a new flow control loop. The flow transmitter outputs 4-20 mA, and the control valve is pneumatic with a 3-15 psi input. The controller's analog output is 4-20 mA. What additional device is required to convert the controller's output to the valve's input?

An I/P transducer (current-to-pressure converter)

A resistance temperature detector (RTD)

In a feedback control loop, what is the 'setpoint'?

The difference between the desired and actual values

The output signal to the actuator

The actual measured value of the process variable

The desired value of the process variable

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ICS Components & Architecture GICSP Practice Questions (Page 5)

Part of the ICS Fundamentals and Architecture domain, which makes up ~40% of our current practice bank. GIAC (SANS) does not publish an official question count, but from its 180-minute exam (~70–120 total, ~28–48 in this domain), expect 7–12 from this objective — we provide 53 practice questions to prepare you well beyond it. (estimate)

53questions here

11free pages

10concepts

Questions 21–25

21expert · hard
A plant has a critical process that cannot tolerate more than 500 ms of downtime. The current PLC has a mean time to repair (MTTR) of 2 hours. The engineer is considering two options: (A) a redundant PLC pair with automatic failover, or (B) a hot-standby PLC with manual switchover. Which option meets the downtime requirement?
Select an answer first
22application · medium
A chemical plant operator needs to monitor and adjust a batch reactor's temperature profile from a control room. The reactor is controlled by a PLC that communicates over a proprietary fieldbus. The operator currently has no visibility into the process. Which solution provides the operator with the required visibility and control while minimizing changes to the existing field-level wiring?
Select an answer first
23foundation · easy
Which system in an ICS is primarily responsible for storing time-series data from the process for historical analysis and reporting?
Select an answer first
24application · medium
A technician is commissioning a new flow control loop. The flow transmitter outputs 4-20 mA, and the control valve is pneumatic with a 3-15 psi input. The controller's analog output is 4-20 mA. What additional device is required to convert the controller's output to the valve's input?
Select an answer first
25foundation · easy
In a feedback control loop, what is the 'setpoint'?
Select an answer first

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ICS Components & Architecture GICSP Practice Questions (Page 5)

Questions 21–25

Which system in an ICS is primarily responsible for storing time-series data from the process for historical analysis and reporting?

A technician is commissioning a new flow control loop. The flow transmitter outputs 4-20 mA, and the control valve is pneumatic with a 3-15 psi input. The controller's analog output is 4-20 mA. What additional device is required to convert the controller's output to the valve's input?

In a feedback control loop, what is the 'setpoint'?

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