Industrial Maintenance Technician Practice Test 2025 – Your All-in-One Guide to Exam Success!

The correct choice identifies the fundamental components of a Programmable Logic Controller (PLC). PLCs are industrial digital computers that control manufacturing processes or machinery. They typically consist of several key sections, which include:

- Input modules: These are responsible for receiving signals from input devices such as sensors and switches. They convert the incoming signals (analog or digital) into a format that the CPU can process.

- CPU (Central Processing Unit): The CPU is the brain of the PLC. It processes the information received from the input modules, executes the control logic based on the programmed instructions, and sends signals to the output modules.

- Output modules: These modules are responsible for controlling actuator devices such as motors, valves, and lights. They convert the processed information from the CPU back into signals to control these output devices.

- Programming device: This is used to write and modify the control logic that the PLC executes. It serves as an interface for engineers and technicians to interact with the PLC and program it according to operational requirements.

- Operator Interface Device: This component allows operators to interact with the PLC system, typically providing means of monitoring and controlling the processes. It can display data, provide alarms, and receive information from the operators.

These sections work together to form a cohesive