10 / 20

What is the standard pressure setting in hectopascals (hPa) to one decimal place?

  • A

    1013.1 hPa

  • B

    1013.2 hPa

  • C

    1013.3 hPa

  • D

    1013.4 hPa

Atmospheric pressure, density, temperature, and lapse rate vary significantly and are constantly changing across different parts of the globe. To provide a consistent reference, the International Civil Aviation Organization (ICAO) has established the International Standard Atmosphere (ISA). This model represents average atmospheric conditions from just below mean sea level up to 32 km. At mean sea level, ISA specifies the following conditions:

  • Temperature = +15°C
  • Pressure = 1013.2 hectopascal (hPa)
  • Density = 1.225 kg/m3

From the surface upwards:

  • The temperature decreases by 0.65°C/100 meters (1.98°C/1000 feet) up to an altitude of 11 km (36 090 feet), where it reaches -56°C.
  • The temperature remains constant at -56.5°C from 11 km (36 090 feet) to 20 km (65 617 feet), or flight level 650 (FL650).

Your Notes (not visible to others)



This question has appeared on the real examination, you can find the related countries below.

  • Romania
    1
Keyboard Shortcut Use Keyboard Shortcuts