Practice Test Geeks(CSI) Certified System Integrator Practice Test
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Installation, Configuration & Troubleshooting Flashcards

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

Read the first 7 Installation, Configuration & Troubleshooting flashcards as text

  1. When commissioning an OPC UA server for plant-floor data aggregation, the integrator must configure security mode. For a production environment, which setting is required?

    Answer: SignAndEncrypt – messages are signed and encrypted

    Production OPC UA deployments require SignAndEncrypt mode to protect data integrity and confidentiality against network eavesdropping and tampering.

  2. A system integrator installs a new fieldbus segment and finds that devices randomly drop off the network. Checking the physical layer, the integrator should verify:

    Answer: That the bus is properly terminated at both ends with the correct termination resistors

    Missing or incorrect termination resistors cause signal reflections on fieldbus segments, leading to random communication errors and device dropouts.

  3. During startup of a new chiller control system, the integrator notices the supply air temperature sensor reads 15°F lower than the actual temperature. This type of error is classified as:

    Answer: Offset (zero) error

    A constant difference across the measurement range that shifts all readings up or down by the same amount is an offset or zero error.

  4. An integrator is asked to configure VLAN segmentation between IT and OT networks at a manufacturing plant. The PRIMARY reason for this segmentation is:

    Answer: To reduce broadcast traffic and isolate OT systems from IT security threats

    VLAN segmentation limits broadcast domains and creates a security boundary that prevents IT-side threats (ransomware, scanning) from directly reaching OT devices.

  5. A PLC analog output card is configured for 4–20 mA and should drive a control valve. The valve does not respond. The technician measures 0 mA at the output terminals. This most likely indicates:

    Answer: The output channel is disabled in software or not enabled in the I/O configuration

    A 0 mA output when 4 mA is expected usually means the channel is not enabled or is inhibited in the PLC I/O configuration, producing no drive signal.

  6. When integrating a barcode scanner with a PLC via serial RS-232 communication, the integrator must configure both devices with matching parameters. Which parameter set defines a serial communication link?

    Answer: Baud rate, data bits, parity, stop bits

    RS-232 serial communication requires baud rate, data bits, parity, and stop bits to match on both the transmitting and receiving devices.

  7. A system integrator documents a loop check procedure for a temperature control loop (TIC). During the test, the PV tracks well but the controller output does not drive the valve. The most likely fault location is:

    Answer: The control valve actuator, positioner, or output signal wiring

    If PV tracking is correct but the output has no effect, the fault lies in the output path—signal wiring to the positioner, the positioner itself, or the valve actuator.