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Engineering Thermodynamics

Engineering Thermodynamics
In a reversible adiabatic process, the ratio of T1/T2 is equal to

(p1/p2)γ - 1/ γ
(v1/v2)γ - 1/ γ
(p2/p1)γ - 1/ γ
(v2/v1)γ - 1/ γ

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Engineering Thermodynamics
The value of gas constant (R) in S. I. units is

287 J/kgK
2.87 J/kgK
28.7 J/kgK
0.287 J/kgK

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Engineering Thermodynamics
The efficiency of Carnot cycle depends upon

Temperature limits
Volume compression ratio
Cut-off ratio and compression ratio
Pressure ratio

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Engineering Thermodynamics
Which of the following processes are thermodynamically reversible?

Constant volume and constant pressure
Throttling
Isothermal and adiabatic
Free expansion

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Engineering Thermodynamics
The change of entropy, when heat is absorbed by the gas, is

Positive or negative
Positive
None of these
Negative

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Engineering Thermodynamics
Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits?

O₂, N₂, H₂, air
SO₂, NH₃, CO₂, moisture
O₂, N₂, water vapour
O₂, N₂, steam, CO₂

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