Interactive Self-Study Module: Wet and Dry Basis


This module uses a screencast to explain the differences between wet and dry bases, as well as how to interconvert between them and how to determine the moisture content for a stream under both bases. It then provides example problems to allow the user to test themselves. Your retention of material in this module will increase if you write down reasons for your answers to ConcepTests and you try to solve the example problems before watching the screencast solutions. We suggest using the learning resources in the following order:

  1. Attempt to answer the multiple-choice ConcepTest and solve the example problem before watching the screencast.
  2. Watch the screencast that describes wet to dry basis conversion.
  3. Review important equations for wet and dry basis.
  4. Try to solve the example problems before watching the solutions in the screencasts.
  5. Answer the ConcepTests.
  6. Look at the list of key points, but only after you try to list the key points yourself.
  • Combustion reactions are common in chemical engineering applications, and both wet and dry bases are used.
  • This module is intended for a material and energy balance course.
Before studying this module, you should:
After studying this module, you should be able to:
  • Distinguish between wet and dry bases and be able to analyze combustion reactions using either basis.
  • Calculate the moisture content of a stream on both a wet and a dry basis and interconvert between the two bases.