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Engineering Thermodynamics

Engineering Thermodynamics
The polytropic index (n) is given by

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

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Engineering Thermodynamics
For the same compression ratio, the efficiency of Diesel cycle is __________ Otto cycle.

Less than
Greater than
Equal to
None of these

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Engineering Thermodynamics
When the expansion or compression takes place according to the law pvn = C, the process is known as

Polytropic process
Adiabatic process
Hyperbolic process
Isothermal process

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Engineering Thermodynamics
The kinetic energy per kg molecule of any gas at absolute temperature T is equal to (where Ru = Universal gas constant)

1.5 Ru × T
2 Ru × T
Ru × T
3 Ru × T

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Engineering Thermodynamics
The value of the product of molecular weight and the gas characteristic constant for all the gases in M.K.S. unit is

8314 kgfm/mol °K
427 kgfm/mol °K
848 kgfm/mol °K
29.27 kgfm/mol °K

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Engineering Thermodynamics
The efficiency of Carnot cycle is maximum for

Steam engine
Petrol engine
Reversible engine
Gas engine

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MORE MCQ ON Engineering Thermodynamics

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