Questions

The following are questions to test your understanding of chapter two. Ensure you have read and understood the topics in this chapter before attempting the questions.

1. ______________________ provide information about the environment for a controller to process.
2. Devices that detect the presence or absence of object are referred to as __________________
3. In human being, eyes, nose, ear, tongue, and skin can be referred to as a _________________
4. Switches that are operated by hand are referred to as _________________
5. A ______________ switch is controlled automatically by factors such as pressure, position, or temperature.
6. ________________________is a type of switch that has only one input (usually referred to as common) and can connect to and switch between two different outputs.
7. ____________________ can detect the presence of liquids, powder, or granulated materials in a vessel.
8. A non-contact sensor that detects ferrous metals, such as carbon steel, stainless steel, cast iron, etc...