Topics. 1  Flagger duties and qualifications. 2  Flagger Safety. 3  Flagging equipment. 4  Flagging procedures. 5  Typical flagger operations.
dew point-the temperature at which the water vapor in the air becomes saturated and condensation begins.temperature-the degree of hotness or coldness of a body or environment (corresponding to its molecular activity).ew point. The temperature at which air becomes saturated with water vapor and dew forms. The dew point varies depending on how much water vapor is in the air.
Dewpoint is the temperature where condensation begins, or where the relative humidity would be 100% if the air was cooled. This is readily apparent from the diagram for water vapor, given that dewpoint is just a more intelligible way to express partial water vapor pressure (see Figure 2: Dewpoint of gas at 42% RH).ven though dewpoint is expressed as a temperature, it correlates with the amount of water vapor in the air, and is therefore not dependent on ambient temperature. Dewpoint temperature is always less than or equal to the actual temperature, with the extremes for normal outdoor air being â30 Â°C and +30 Â°C.