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.
Condensation can actually occur while the temperature is rising, as it does all the time in a cloud. That is, when condensation starts, the temperature rises as a result of the condensation. Condensation occurs when more water vapour is added to the atmosphere than can be kept apart by the atmosphere at its present temperature. Once water vapour is colliding, the air must be able to knock the water vapour molecules apart or, heat is released and we have condensation. Loss of heat comes from the water vapour sticking together, and it takes heat from the air to keep it from sticking. So, when we have a lot of water vapour. air must have that heat or the water sticks together.