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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following gas has a minimum molecular mass?

Methane
Oxygen
Hydrogen
Nitrogen

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Engineering Thermodynamics
In an isothermal process

There is no change in enthalpy
There is no change in internal energy
All of the listed here
There is no change in temperature

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Engineering Thermodynamics
Brayton cycle consists' of following four processes

Two isentropic and two constant volumes
Two isentropic, one constant volume and one constant pressure
Two isothermal and two isentropic
Two isentropic and two constant pressures

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Engineering Thermodynamics
The efficiency of Stirling cycle is __________ Carnot cycle.

Greater than
Less than
None of these
Equal to

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Engineering Thermodynamics
The efficiency of Carnot cycle depends upon

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

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Engineering Thermodynamics
The absolute zero pressure can be attained at a temperature of

-273°C
273 K
None of these
0°C

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