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GATE ME 2022: Thermodynamics (App update required to attempt this test)

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Question 1

Calculate Efficiency of the system, the net Work transfer & Heat rejected to sink for a Carnot cycle operates between sources and sink temperatures of 285 °C and – 11 °C. If the system receives 100 kJ from the source.

Question 2

5 m3 of an ideal gas at 1 bar pressure is compressed isothermally in an adiabatic piston-cylinder device to 2 m3. Maximum work input needed by the compressor is

Question 3

The COP of a Carnot refrigerator is 6. The ratio of its lower and higher absolute temperature is :

Question 4

Following the equation of state P (v − a) = RT air undergoes a change of state from 120kPa and 293K to 500kPa and 573K where a=0.32m3/kg. What will be the change in the entropy (kJ/kgK) of air?

Take Cp = 1.018 kJ/kg- K & R = 0.287 kJ/kg- K

Question 5

In a constant pressure process, 1kg of air at 300 K is mixed with 1 kg air at 400 K. If the pressure is 100 kPa and Q = 0, the entropy generation in the process will be

Question 6

The vander Walls equation of state is (p+a/V2) (v-b) = RT, where p is pressure, v is specific volume, T is temperature and R is characteristic gas constant The SI unit of a is
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