If you land at an airport with your altimeter set to 29.92 in. Hg. instead of the current setting of 30.00 in. Hg., what will the altimeter read at a field elevation of 2,000 feet MSL?

When landing at an airport with the altimeter set incorrectly to 29.92 in. Hg instead of the current setting of 30.00 in. Hg, the altimeter will indicate a different altitude than the true altitude. The altimeter measures pressure, and because the standard atmosphere assumes a value of 29.92 in. Hg at sea level, any deviation in the altimeter setting can lead to a misreading of altitude.

In this case, if the current setting is 30.00 in. Hg, this indicates that the air pressure is higher than the standard setting of 29.92 in. Hg. An altimeter set to a lower pressure (29.92 in. Hg) will read higher than the true altitude since you’re effectively comparing the aircraft's measured pressure to a lower reference level.

At a field elevation of 2,000 feet MSL, the altitude indicated on an altimeter set to a lower pressure will show as if the aircraft is slightly higher. The standard atmosphere shows that for every increase of 0.01 in. Hg from standard, there is approximately 27 feet of altitude adjustment. Since the difference here is 0.08 in. Hg (30.00 - 29.