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Aviation Glossary :: Vapor Pressure  Aviation Glossary :: Vapor Pressure FAA Written Test Preparation
Aviation Glossary Welcome to the Dauntless Aviation Glossary!

At Dauntless, our editorial staff maintains the web's largest unified glossary of aviation terms. This glossary is built from a combination of official, quasi-official, and proprietary sources (including original material that we develop oursselves). Uniquely, we often provide multiple definitions of a given term so that you can find that which best applies to you. In order to maximize your learning efficiency, this glossary (and similar ones for our international users) is incresingly fully integrated into our aviation learning apps, including our FAA written test prep and FAA practical test prep software and apps. If you like this glossary, you'll love them with their polished learning environments and world's best and clearest content (please do give them a try.).

Vapor Pressure
Vapor Pressure
The pressure of the vapor above a liquid needed to prevent the liquid evaporating. Vapor pressure is always specified at a specific temperature.
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source: FAA Aviation Maintenance Technician Airframe Handbook (FAA-H-8083-31)

The portion of atmospheric pressure that is exerted by the moisture in the air (expressed in tenths of an inch of mercury).
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source: FAA Aviation Maintenance Technician General Handbook (FAA-H-8083-30)

The amount of pressure needed above a liquid to prevent it from evaporating.
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source: FAA Aviation Maintenance Technician Powerplant Handbook (FAA-H-8083-32)

In meteorology, the pressure of water vapor in the atmosphere. Vapor pressure is that part of the total atmospheric pressure due to water vapor and is independent of the other atmospheric gases or vapors.
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source: FAA Aviation Weather for Pilots (AC 00-6A)

The partial pressure of water vapor in an air-water system.
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source: NOAA National Weather Service Glossary


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Disclaimer: While this glossary in most cases is likely to be highly accurate and useful, sometimes, for any number of editorial, transcription, technical, and other reasons, it might not be. Additionally, as somtimes you may have found yourself brought to this page through an automated term matching system, you may find definitions here that do not match the cotext or application in which you saw the original term. Please use your good judgement when using this resource.


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