Jet aircrafts fly at altitudes above 30,000 ft where the air is very cold at - 40° C and the pressure is 0.28 atm. The cabin is maintained at 1 atm pressure by means of a compressor which exchanges air from outside adiabatically. In order to have a comfortable cabin temperature of 25 C, we will require in addition:

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Examsnet · Accepted Answer

Correct Answer is :  an air-conditioner to cool the air injected  into the cabin

KVPY SB SX Exam 2011 Question Paper