Question

give reason for the following statement airplanes have pressurized cabin for passenger safety while flying high in the atmosphere​

Answer 1

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The air pressure inside the cabin is always kept higher than the outside atmospheric pressure at high altitudes. At high altitudes (35000–40000 feet), where airplanes fly, the air pressure is very low. At that altitudes, we people would become unconcious in about 15 seconds.

To avoid such kind of problems, airplanes have pressurized cabins. To maintain the air pressure inside the cabin, compreesed air is generally bled off from the engines. This air is very hot, about 250 degree celcius.

This air is then passed through an air cycle machine where, the heat is taken out of the air, humidified and then its bled-in to the cabin.

This process is known as Cabin Pressurization.

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