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Engineering Thermodynamics

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

1.27
0.75
1.35
1

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Engineering Thermodynamics
The ratio of molar specific heats for mono-atomic gas is

1
1.67
1.87
1.4

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Engineering Thermodynamics
Which of the following gas has the highest calorific value?

Coal gas
Producer gas
Blast furnace gas
Mond gas

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Engineering Thermodynamics
The compression ratio is the ratio of

Swept volume to clearance volume
Swept volume to total volume
Total volume to clearance volume
Total volume to swept volume

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Engineering Thermodynamics
Work done in an adiabatic process between a given pair of end states depends on

The end states only
Particular adiabatic process
The value of heat transferred
The value of index ‘n’

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Engineering Thermodynamics
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle

Combustion is at constant volume
Maximum temperature is higher
Expansion and compression are isentropic
Heat rejection is lower

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