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Engineering Thermodynamics

Engineering Thermodynamics
The value of n = 1 in the polytropic process indicates it to be

Isothermal process
Reversible process
Adiabatic process
Irreversible process

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Engineering Thermodynamics
The polytropic index (n) is given by

log (v1/ v2)/ log (p1/p2)
log (p1p2)/log (v1v2)
log (p2/ p1)/log (v1/ v2)
log [(p1v1)/(p2v2)]

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

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Engineering Thermodynamics
The same volume of all gases would represent their

Molecular weights
Gas characteristic constants
Densities
Specific weights

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

1
2
-1

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Engineering Thermodynamics
Thermal power plant works on

Joule cycle
Rankine cycle
Carnot cycle
Otto cycle

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MORE MCQ ON Engineering Thermodynamics

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