Certified Flight Instructor - Flight Instructor Airplane Practice Exam

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If the altimeter setting is 29.96 at an airport that is 3,563 feet MSL, what is the pressure altitude?

  1. 3,527 feet MSL.

  2. 3,556 feet MSL.

  3. 3,639 feet MSL.

The correct answer is: 3,527 feet MSL.

To determine the pressure altitude, you can use the formula that relates the altimeter setting to the altitude above mean sea level (MSL). Pressure altitude is calculated by taking the altitude above mean sea level and adjusting it based on the current altimeter setting, using the standard atmospheric pressure of 29.92 inches of mercury (Hg) as a reference. The formula to calculate pressure altitude is: Pressure Altitude = [(Standard Pressure - Current Altimeter Setting) x 1,000] + Actual Field Elevation In this case, the field elevation of the airport is 3,563 feet MSL, and the current altimeter setting is 29.96 inHg. The standard altimeter setting is 29.92 inHg. Calculating the difference: Standard Pressure - Current Altimeter Setting = 29.92 inHg - 29.96 inHg = -0.04 inHg Now, convert this difference to feet: -0.04 inHg x 1,000 = -40 feet (since 1 inHg corresponds to a change of approximately 1,000 feet in pressure altitude). Then, apply this to the actual field elevation: Pressure Altitude = (-40 feet) + 3,

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