What is the pressure altitude at an airport that is 3,563 feet MSL with an altimeter setting of 29.96?

What is the pressure altitude at an airport that is 3,563 feet MSL with an altimeter setting of 29.96?

• A. 3,563 feet MSL
• B. 3,500 feet MSL
• C. 3,527 feet MSL
• D. 3,600 feet MSL

Answer: (C)

To determine the pressure altitude at an airport, you need to understand the relationship between the current altitude above mean sea level (MSL), the altimeter setting, and the standard atmospheric pressure. Pressure altitude is the altitude in standard atmospheric conditions where the pressure is equal to 29.92 inches of mercury (inHg). Given an airport at 3,563 feet MSL and an altimeter setting of 29.96 inHg, we must first convert the measured altitude to pressure altitude using the altimeter setting. A standard sea-level pressure is 29.92 inHg, so in this case, with an altimeter setting of 29.96, we are slightly above the standard pressure. The formula to convert your MSL altitude down to pressure altitude when the altimeter setting is above the standard pressure is: Pressure Altitude = (Field Elevation in MSL) + (Standard Pressure - Current Pressure) x 1,000 feet Therefore, - Field Elevation = 3,563 feet - Standard Pressure = 29.92 inHg - Current Pressure = 29.96 inHg The difference between standard and current pressure is: 29.92 - 29.96 = -0.04 in

To determine the pressure altitude at an airport, you need to understand the relationship between the current altitude above mean sea level (MSL), the altimeter setting, and the standard atmospheric pressure. Pressure altitude is the altitude in standard atmospheric conditions where the pressure is equal to 29.92 inches of mercury (inHg).

Given an airport at 3,563 feet MSL and an altimeter setting of 29.96 inHg, we must first convert the measured altitude to pressure altitude using the altimeter setting. A standard sea-level pressure is 29.92 inHg, so in this case, with an altimeter setting of 29.96, we are slightly above the standard pressure.

The formula to convert your MSL altitude down to pressure altitude when the altimeter setting is above the standard pressure is:

Pressure Altitude = (Field Elevation in MSL) + (Standard Pressure - Current Pressure) x 1,000 feet

Therefore,

• Field Elevation = 3,563 feet

• Standard Pressure = 29.92 inHg

• Current Pressure = 29.96 inHg

The difference between standard and current pressure is:

29.92 - 29.96 = -0.04 in