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Engineering Thermodynamics

Engineering Thermodynamics
The efficiency of Diesel cycle increases with

Constant cut-off
Decrease in cut-off
Increase in cut-off
None of these

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

1.87
1.4
1.67
1

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Engineering Thermodynamics
The efficiency of the Carnot cycle may be increased by

Increasing the lowest temperature
Keeping the lowest temperature constant
Increasing the highest temperature
Decreasing the highest temperature

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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
If in the equation pvn = C, the value of n = ∝, then the process is called

Constant volume process
Constant pressure process
Adiabatic process
Isothermal process

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Engineering Thermodynamics
The main cause for the irreversibility is

All of these
Unrestricted expansion
Mechanical and fluid friction
Heat transfer with a finite temperature difference

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MORE MCQ ON Engineering Thermodynamics

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