Density altitude is defined as pressure altitude corrected for non-standard temperature variations. Which term matches this definition?

Density altitude is defined as pressure altitude corrected for non-standard temperature variations. Which term matches this definition?

• A. Density Altitude
• B. Deviation
• C. Direct Control
• D. Coriolis Effect

Answer: (A)

Density altitude is pressure altitude corrected for non-standard temperature variations. This matters because air density governs rotor efficiency and overall aircraft performance. When the temperature is higher than standard at a given pressure, the air becomes less dense, so density altitude is higher than the actual altitude, meaning the helicopter will perform as if it were higher. If the temperature is cooler than standard, air is denser and density altitude is lower than the pressure altitude. The definition described points to density altitude, since it explicitly involves adjusting pressure altitude by the temperature deviation. The other terms don’t describe this concept: deviation relates to magnetic compass errors, direct control isn’t a term used for altitude or density corrections, and the Coriolis Effect describes the apparent deflection of moving air due to Earth’s rotation, not how altitude is corrected for temperature.

Density altitude is pressure altitude corrected for non-standard temperature variations. This matters because air density governs rotor efficiency and overall aircraft performance. When the temperature is higher than standard at a given pressure, the air becomes less dense, so density altitude is higher than the actual altitude, meaning the helicopter will perform as if it were higher. If the temperature is cooler than standard, air is denser and density altitude is lower than the pressure altitude. The definition described points to density altitude, since it explicitly involves adjusting pressure altitude by the temperature deviation. The other terms don’t describe this concept: deviation relates to magnetic compass errors, direct control isn’t a term used for altitude or density corrections, and the Coriolis Effect describes the apparent deflection of moving air due to Earth’s rotation, not how altitude is corrected for temperature.