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Engineering Thermodynamics

Engineering Thermodynamics
Which of the following cycles is not a reversible cycle?

Carnot
Stirling
Ericsson
None of the listed here

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Engineering Thermodynamics
A path 1-2-3 is given. A system absorbs 100 kJ as heat and does 60 kJ of work while along the path 1-4-3, it does 20 kJ of work. The heat absorbed during the cycle 1-4-3 is

-80 kJ
-40 kJ
+60 kJ
-140 kJ

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Engineering Thermodynamics
Absolute zero pressure will occur

Under vacuum conditions
When molecular momentum of the system becomes zero
At sea level
At a temperature of 273°K

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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
In a free expansion process

Work done is zero but heat increases
Both (A) and (B) above
Heat transfer is zero
Work done is zero

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Engineering Thermodynamics
Reversed joule cycle is called

Rankine cycle
Bell Coleman cycle
Brayton cycle
Carnot cycle

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