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Engineering Thermodynamics

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

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

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

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

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Engineering Thermodynamics
Barometric pressure is equal to

735.6 mm Hg
1 mm Hg
760 mm Hg
Zero mm Hg

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Engineering Thermodynamics
If a system after undergoing a series of processes, returns to the initial state then

Its entropy will change due to irreversibility
Process is executed in closed system cycle
Process is thermodynamically in equilibrium
Sum of heat and work transfer will be zero

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Engineering Thermodynamics
The throttling process is __________ process.

Reversible
None of these
Irreversible
Reversible or irreversible

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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
1400 K
1000 K

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