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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following is the lightest and most volatile liquid fuel?

Fuel oil
Gasoline
Kerosene
None of these

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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

Isothermal process
Hyperbolic process
Adiabatic process
Polytropic process

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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

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

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Engineering Thermodynamics
A mixture of gas expands from 0.03 m3 to 0.06 m3 at a constant pressure of 1 MPa and absorbs 84 kJ of heat during the process. The change in internal energy of the mixture is

84 kJ
30 kJ
54 kJ
114 kJ

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Engineering Thermodynamics
Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as

Second law of thermodynamics
Kinetic theory of gases
First law of thermodynamics
Zeroth law of thermodynamics

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Engineering Thermodynamics
The efficiency of Diesel cycle depends upon

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

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