Multiple choice

In an experimental set-up, air flows between two stations P and Q adiabatically. The direction of flow depends on the pressure and temperature conditions maintained at P and Q. The conditions at station P are 150 kPa and 350 K. The temperature at station Q is 300 K. The following are the properties and relations pertaining to air: Specific heat at constant pressure, Cp = 1.005 kJ/kgK; Specific heat at constant volume, Cv = 0.718 kJ/kgK; Characteristic gas constant, R = 0.287 kJ/kgK Enthalpy, h = cp T Internal energy, u = Cv T

If the air has to flow from station P to station Q, the maximum possible value of pressure in kPa at station Q is close to

  1. 50

  2. 87

  3. 128

  4. 150
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Keep practicing — related questions