Internet of Things (IoT) Practice Exam

What sort of actuator would you use to control the movement of a conveyor belt?

1. A linear actuator

2. An AC motor

3. A thermocouple

4. A water pump

The correct answer is: An AC motor

An AC motor is ideal for controlling the movement of a conveyor belt due to its ability to provide continuous rotational motion, which is essential for driving the belt. AC motors are widely used in industrial applications because they offer high efficiency, reliable performance, and the ability to handle varying loads. The selection of an AC motor allows for precise speed control, which is important for applications where different materials require different speeds on the conveyor belt. Additionally, AC motors can be easily integrated with variable frequency drives (VFDs) that allow for adjustable speeds and soft starting, which further enhances their suitability for conveyor systems. Other options, while potentially useful in different contexts, do not meet the specific requirements of conveyor belt movement. A linear actuator typically provides linear, not rotational, motion, which isn't suitable for a conveyor system. A thermocouple is a sensor used for measuring temperature and doesn't function as a control mechanism for movement, and a water pump is used for moving fluids, not solid materials on a belt. Thus, the AC motor is the most appropriate choice for controlling the movement of a conveyor belt.