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SCADA Technician Certification Exam And ( Answers) Plus Rationales 2026 Q&A Instant Download Pdf
Q1 What is the primary purpose of a SCADA system?
- Manage office productivity
- Control and monitor industrial processes
- Run enterprise business applications
- Conduct financial forecasting
Answer: B
Rationale: SCADA systems are specifically designed to monitor and control
industrial processes in real time.
Q2 1 / 4
Which communication protocol is most commonly associated with SCADA?
A. SMTP
B. FTP
- Modbus
D. HTTP
Answer: C
Rationale: Modbus is widely used in SCADA for device communication due
to simplicity and compatibility.
Q3 What device connects sensors and actuators to a SCADA system?
- Firewall
B. PLC
- Router
- Switch
Answer: B
Rationale: A PLC interfaces field devices and executes control logic within
SCADA.
Q4 Which SCADA component provides graphical visualization?
A. RTU 2 / 4
B. PLC
C. HMI
- Sensor
Answer: C
Rationale: The HMI is responsible for displaying real-time system data to
operators.
Q5 What is an RTU mainly used for?
- Network routing
- Remote data acquisition and control
- File transfers
- ERP processing
Answer: B
Rationale: RTUs collect data and execute commands at remote sites where
PLCs may not be used.
Q6 Which layer of the Purdue Model contains field instrumentation?
- Level 0
- Level 2 3 / 4
- Level 3
- Level 4
Answer: A
Rationale: Level 0 includes physical sensors and actuators.
Q7 A SCADA operator notices a sudden spike in sensor readings. First action?
- Reboot the SCADA server
- Check communication integrity
- Replace all sensors
- Ignore the spike
Answer: B
Rationale: Communication faults can cause anomalous data before
equipment issues are assumed.
Q8 Which network topology is most resilient for SCADA?
- Bus
- Ring
- Star
- Mesh
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