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Engineering Thermodynamics

Engineering Thermodynamics
Minimum work in compressor is possible when the value of adiabatic index ‘n’ is equal to

1
1.27
1.35
0.75

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Engineering Thermodynamics
Which of the following parameters is constant for a mole for most of the gases at a given temperature and pressure

Mass
Entropy
Enthalpy
Volume

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Engineering Thermodynamics
The value of specific heat at constant pressure (cp) is __________ that of at constant volume (cv).

None of these
Less than
Equal to
More than

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Engineering Thermodynamics
The efficiency of Diesel cycle depends upon

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

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Engineering Thermodynamics
An adiabatic process is one in which

The change in internal energy is equal to the mechanical work done
No heat enters or leaves the gas
The temperature of the gas changes
All of these

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

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

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