FAA Ground School Practice Test

What does the altimeter setting indicate at field elevation?

1. True altitude at field elevation

2. Indicated altitude at takeoff

3. The pressure altitude

4. Absolute altitude above sea level

The correct answer is: True altitude at field elevation

The altimeter setting indicates true altitude at field elevation because it calibrates the altimeter to reflect the actual height above sea level at that specific location. This calibration is necessary to ensure that the altitude readings are accurate for safe takeoff, navigation, and landing. When the altimeter is set to the standard pressure setting of 29.92 inches of mercury (or the local altimeter setting if provided), it allows pilots to understand exactly how high the aircraft is above sea level when at that field elevation. This accuracy is critical for maintaining safe vertical separation during flight, especially in areas with varying terrain. While the other options refer to different concepts related to altitude, they do not specifically reflect what the altimeter setting indicates at field elevation. Indicated altitude at takeoff can vary depending on the setting adjusted for the aircraft during the flight and may not be true altitude without proper calibration. Pressure altitude takes pressure into account but doesn't provide a direct reflection at field elevation unless adjusted, and absolute altitude pertains to the height above the terrain rather than sea level, which diverges from the focus on field elevation.