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Engineering Thermodynamics

Engineering Thermodynamics
In closed cycle gas turbine, the air is compressed

Isothermally
Polytropically
None of these
Isentropically

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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

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

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Engineering Thermodynamics
The value of one bar (in S. I. units) is equal to

1 × 105 N/m2
1 × 104 N/m2
1 × 103 N/m2
1 × 102 N/m2

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Engineering Thermodynamics
No liquid can exist as liquid at

Centre of earth
Zero pressure
Vacuum
273°K

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Engineering Thermodynamics
Entropy change depends on

Heat transfer
Mass transfer
Change of temperature
Thermodynamic state

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Engineering Thermodynamics
The temperature at which the volume of a gas becomes zero is called

Absolute scale of temperature
None of these
Absolute temperature
Absolute zero temperature

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