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Engineering Thermodynamics

Engineering Thermodynamics
The efficiency of the Carnot cycle is (where T1 and T2 = Highest and lowest temperature during the cycle)

1 - (T1/T2)
(T1/T2) - 1
1 - (T2/T1)
1 + (T2/T1)

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Engineering Thermodynamics
An actual engine is to be designed having same efficiency as the Carnot cycle. Such a proposition is

Possible, but with lot of sophistications
Feasible
Impossible
Possible

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Engineering Thermodynamics
The increase in entropy of a system represents

Increase in temperature
Increase in availability of energy
Degradation of energy
Decrease in pressure

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Engineering Thermodynamics
One reversible heat engine operates between 1600 K and T2 K and another reversible heat engine operates between T2 K and 400 K. If both the engines have the same heat input and output, then temperature T2 is equal to

1200 K
800 K
1000 K
1400 K

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Engineering Thermodynamics
In closed cycle gas turbine, the air is compressed

None of these
Polytropically
Isothermally
Isentropically

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Engineering Thermodynamics
In S. I. units, the value of the universal gas constant is

8314 J/kg mole-K
83.14 J/kg mole-K
8.314 J/kg mole-K
831.4 J/kg mole-K

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