Suppose a conventional jet airliner is at an altitude of 10 km, the outside air pressure is 250 hPa, and the outside temperature is -60C. What would be the air temperature inside the jet if the outside air is brought inside and compressed to a 1000 hPa pressure? (Assume that 1000 hPa pressure is equivalent to 0 m altitude.)
A)60C
B)40C
C)0C
D)-60C

Question

Suppose a conventional jet airliner is at an altitude of 10 km, the outside air pressure is 250 hPa, and the outside temperature is -60C. What would be the air temperature inside the jet if the outside air is brought inside and compressed to a 1000 hPa pressure? (Assume that 1000 hPa pressure is equivalent to 0 m altitude.)
A)60C 
B)40C 
C)0C 
D)-60C

Quizplus · Accepted Answer

When air is compressed from 250 hPa to 1000 hPa, it warms up. The temperature increase can be estimated using the adiabatic lapse rate, which suggests a significant temperature rise, making option B (40°F) the most plausible.

Suppose a Conventional Jet Airliner Is at an Altitude of 10