Latest KVPY Aptitude Question SOLUTION: Jet aircrafts fly at altitudes above 30,000 ft where the air is very cold at – 40ºC and the pressure is 0.28 atm. The cabin is maintained at 1 atm pressure by means of a compres

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(#M40027167) KVPY question General Ability Test Keep an EYE

Jet aircrafts fly at altitudes above 30,000 ft where the air is very cold at – 40ºC 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 25ºC, we will require in addition -
(A) a heater to warm the air injected into the cabin
(B) an air-conditioner to cool the air injected into the cabin
(C) neither a heater nor an air-conditioner ; the compressor is sufficient
(D) alternatively heating and cooling in the two halves of the compressor cycle

Asked In KVPY (11 years ago)

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