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Engineering Thermodynamics

Engineering Thermodynamics
The polytropic index (n) is given by

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

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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

Hyperbolic process
Polytropic process
Adiabatic process
Isothermal process

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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
The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

1.086
0.086
1.086
4.086

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Engineering Thermodynamics
The efficiency of a Carnot engine depends on

Working substance
Temperatures of source and sink
Size of engine
Design of engine

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

1.4
1.87
1.67
1

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