On Mon, 6 Aug 2007 12:05:17 -0500, Dallas wrote:

An increase in temperature will result in a higher atmospheric pressure - a
higher temperature speeds up the movement of the air molecules, thereby
raising the pressure they exert on the surrounding atmosphere.

Most respondents discounted this statement as incorrect or a flawed
problem. And yet it appears very simply stated in this form as a test
question on the private pilot written:

How do variations in temperature affect the altimeter?

A. Higher temperatures expand the pressure levels and the indicated
altitude is higher than true altitude.
B. Lower temperatures lower the pressure levels and the indicated altitude
is lower than true altitude.
C. Pressure levels are raised on warm days and the indicated altitude is
lower than true altitude.


Answer (C) is Correct - On warm days, the atmospheric pressure levels are
higher than on cold days. Your altimeter will indicate a lower than true
altitude. Remember, "Low to high, clear the sky."

:-/

--
Dallas