Density altitude is defined as what?

Density altitude is defined as what?

• A. Pressure altitude corrected for nonstandard temperature
• B. Indicated altitude corrected for humidity
• C. True altitude corrected for pressure
• D. Calibrated airspeed at sea level density

Answer: (A)

Density altitude is the altitude in the standard atmosphere that corresponds to the current air density. It’s found by taking pressure altitude and correcting it for the actual temperature deviation from ISA. Warmer-than-standard air is less dense, so density altitude rises above the pressure altitude; cooler air makes it lower. This matters because aircraft performance—thrust, lift, and engine/airframe efficiency—depends on density, not just location or pressure. Other options miss this temperature correction or mix in factors that don’t define density altitude.

Density altitude is the altitude in the standard atmosphere that corresponds to the current air density. It’s found by taking pressure altitude and correcting it for the actual temperature deviation from ISA. Warmer-than-standard air is less dense, so density altitude rises above the pressure altitude; cooler air makes it lower. This matters because aircraft performance—thrust, lift, and engine/airframe efficiency—depends on density, not just location or pressure. Other options miss this temperature correction or mix in factors that don’t define density altitude.