SCADA Technician Certification Exam

SCADA Technician Certification Exam Practice Questions And Correct Answers (Verified 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
• / 4