Which of the following statements is FALSE?

The statement about a psychrometer measuring wind pressure is incorrect because a psychrometer is specifically designed to measure humidity. It accomplishes this by utilizing two thermometers: one with a wet bulb and one with a dry bulb. The difference in temperature readings between these two thermometers is used to determine the moisture content of the air, which is a direct measure of humidity.

In contrast, a hygrometer also serves the purpose of measuring humidity but does so using different methods and technologies. The dew point is a crucial measure that directly indicates the moisture content in the air; it’s the temperature at which air becomes saturated with water vapor and condensation begins to form. The presence of steam fog typically indicates a significant temperature difference between the warm, moist air and a cooler surface, which contributes to the formation of fog.

Thus, the identification of the psychrometer's function in the context of wind pressure, as stated in the incorrect answer, highlights a misunderstanding of meteorological instruments and their specific roles in measuring atmospheric conditions.