What is the density altitude if the airport elevation is 3,795 ft, OAT 24°C, and altimeter setting 29.70" Hg?

What is the density altitude if the airport elevation is 3,795 ft, OAT 24°C, and altimeter setting 29.70" Hg?

• A. 4,800 feet
• B. 5,100 feet
• C. 5,900 feet
• D. 6,300 feet

Answer: (C)

To determine density altitude, several factors must be considered, including the airport elevation, outside air temperature (OAT), and altimeter setting. Density altitude can be calculated using the following steps: 1. **Identify the pressure altitude**: This is established by the altimeter setting. The standard atmospheric pressure at sea level is 29.92 inches of mercury (Hg). To find the pressure altitude, you can use the formula: Pressure Altitude = (Standard Pressure - Altimeter Setting) x 1,000 + Airport Elevation. Using your provided altimeter setting of 29.70" Hg against the standard sea-level pressure of 29.92" Hg: Pressure Altitude = (29.92 - 29.70) x 1,000 + 3,795 ft = 0.22 x 1,000 + 3,795 ft = 220 ft + 3,795 ft = 4,015 ft. 2. **Calculate the temperature deviation**: Standard temperature at sea level is 15°C, and it decreases by 2°C per every 1,000 feet up to 10,000 feet. At 4,000 ft, the standard temperature would be

To determine density altitude, several factors must be considered, including the airport elevation, outside air temperature (OAT), and altimeter setting. Density altitude can be calculated using the following steps:

1. Identify the pressure altitude: This is established by the altimeter setting. The standard atmospheric pressure at sea level is 29.92 inches of mercury (Hg). To find the pressure altitude, you can use the formula:

Pressure Altitude = (Standard Pressure - Altimeter Setting) x 1,000 + Airport Elevation.

Using your provided altimeter setting of 29.70" Hg against the standard sea-level pressure of 29.92" Hg:

Pressure Altitude = (29.92 - 29.70) x 1,000 + 3,795 ft = 0.22 x 1,000 + 3,795 ft = 220 ft + 3,795 ft = 4,015 ft.

2. Calculate the temperature deviation: Standard temperature at sea level is 15°C, and it decreases by 2°C per every 1,000 feet up to 10,000 feet. At 4,000 ft, the standard temperature would be