Glossary of Terms

A

• ABSOLUTE HUMIDITY – The weight of water vapor in a given amount of air.
• ABSOLUTE PRESSURE – Pressure measured with the base of zero.
• ABSOLUTE TEMPERATURE – A temperature scale expressed in degrees °F or °C using absolute zero as a base.

B

• BOILING POINT – The temperature at which the addition of any heat will begin a change of state from a liquid to a vapor.

C

• CHECK VALVE – A valve designed to permit flow in one direction only.