Internet of Things (IoT) Practice Exam

What are the actuators in a dairy gate system that directs a cow into a particular area?

1. RF antennae detecting ID of cow

2. Light sensors detecting cow in gate

3. Pneumatic arms on gate mechanism

4. Movement sensor in cow's pendant

The correct answer is: Pneumatic arms on gate mechanism

In a dairy gate system designed to direct cows into specific areas, actuators play a crucial role by physically interacting with the environment based on commands given by a control system. Pneumatic arms are one type of actuator that can effectively open, close, or move the gate mechanism as needed to guide the cow accurately. Pneumatic arms operate using compressed air to produce motion. They can apply significant force and can be programmed to actuate in very precise ways, making them ideal for tasks that require quick responses to the presence of a cow in the gate area. The other options, while important for the overall functionality of the system, do not serve as actuators. RF antennae and movement sensors are primarily involved in identification and detection processes, which inform the control system but do not perform any physical action. Light sensors also contribute to detection by recognizing when a cow is present but lack the capability to physically manipulate the gate. Therefore, pneumatic arms are indeed the correct choice as they fulfill the definition and function of an actuator in this context.