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Engineering Thermodynamics

Engineering Thermodynamics
The energy of molecular motion appears as

Friction
Potential energy
Heat
Surface tension

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Engineering Thermodynamics
The polytropic index (n) is given by

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

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Engineering Thermodynamics
The main cause for the irreversibility is

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

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Engineering Thermodynamics
The heat supplied to the gas at constant volume is (where m = Mass of gas, cv = Specific heat at constant volume, cp = Specific heat at constant pressure, T2 - T1 = Rise in temperature, and R = Gas constant)

mcp (T2 + T1)
mcv (T2 - T1)
mcp (T2 - T1)
mR (T2 - T1)

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Engineering Thermodynamics
Kelvin Planck's law deals with

Conversion of work into heat
Conservation of work
Conservation of heat
Conversion of heat into work

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Engineering Thermodynamics
The efficiency of Carnot cycle depends upon

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

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MORE MCQ ON Engineering Thermodynamics

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