316. Which of the following processes is irreversible process
A.Isothermal
B.Adiabatic
C.Throttling
D.All of the above

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317. In order that a cycle be reversible, following must be satisfied
A.Free expansion or friction resisted expansion/compression process should not be encountered
B.When heat is being absorbed, temperature of hot source and working substance should be same
C.When heat is being rejected, temperature of cold source and working substance should be same
D.All of the above

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318. For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be
A.Zero
B.Minimum
C.Maximum
D.Infinity

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319. Minimum work in compressor is possible when the value of adiabatic index 'n' is equal to
A.0.75
B.1
C.1.27
D.1.35

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320. Molecular volume of any perfect gas at 600 x 103 N/m2 and 27°C will be
A.4.17 m3/kg mol
B.400 m3/kg mol
C.0.15 m3/kg mol
D.41.7 m3/kg mol

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321. The more effective way of increasing efficiency of Carnot engine is to
A.Increase higher temperature
B.Decrease higher temperature
C.Increase lower temperature
D.Decrease lower temperature

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322. Entropy change depends on
A.Heat transfer
B.Mass transfer
C.Change of temperature
D.Thermodynamic state

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