🎛️ Unit 10 — Paper 2

Unit 10 — Engineering and Manufacturing Control Systems

Unit 10 is all about how engineers control machines and processes automatically. You'll learn how systems use sensors to gather information, how that information is processed, and how outputs like motors and valves are controlled in response. Whether it's a production line robot, a temperature-controlled oven, or a CNC machine, control systems are at the heart of modern manufacturing — and this unit gives you the knowledge to understand how they all work.

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Some topics covered in this unit

Open and closed loop control systems — the difference between systems that use feedback and those that don't, and when each is appropriate

Sensors and transducers — how different sensor types detect real-world conditions and convert them into electrical signals

Programmable Logic Controllers (PLCs) — how PLCs are programmed and used to automate industrial processes

Actuators and output devices — motors, solenoids, valves and other devices that carry out physical actions in response to control signals

Signal types — analogue versus digital signals, and how signals are processed and converted within a control system

Automation in manufacturing — how control systems are applied in real industrial settings including CNC machines and robotics

Sample question

Control Systems

A central heating system uses a thermostat to turn the boiler on and off based on the room temperature. What type of control system is this?

Open loop

Closed loop

Manual control

Feedforward control

✓ Correct answer: B — Closed loop. A closed loop system uses feedback from a sensor (the thermostat measuring room temperature) to automatically adjust the output (the boiler). Open loop systems have no feedback — they simply run without monitoring the result.