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Engineering Thermodynamics

Engineering Thermodynamics
The entropy of water at 0°C is assumed to be

2
1
-1

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Engineering Thermodynamics
A process, in which the temperature of the working substance remains constant during its expansion or compression, is called

Polytropic process
Isothermal process
Adiabatic process
Hyperbolic process

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Engineering Thermodynamics
According to Regnault's law, the specific heat at constant pressure (cp) and specific heat at constant volume (cv) _________ with the change in pressure and temperature of the gas.

Change
Do not change
None of these
Both (A) and (B)

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Engineering Thermodynamics
The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as

Internal energy
Enthalpy
Entropy
External energy

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Engineering Thermodynamics
The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will

Increase/decrease depending on application
Increase
Remain unchanged
Decrease

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Engineering Thermodynamics
Work done in a free expansion process is

Positive
Minimum
Maximum
Zero

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