Multiple choice

The mean sea level pressure according to ISA is taken to be approximately

  1. 1010 Hpa

  2. 1013 Hpa

  3. 1015 Hpa

  4. 1020 Hpa
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

ISA standard sea level pressure is 1013.25 hPa (commonly rounded to 1013 hPa). This is the reference pressure used for altimeter calibration and all aircraft performance calculations under standard conditions.

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