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Engineering Thermodynamics

Engineering Thermodynamics
The atomic mass of nitrogen is __________ oxygen.

Equal to
Less than
None of these
More than

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Engineering Thermodynamics
The ratio of specific heat at constant pressure (cp) and specific heat at constant volume (cv) is

Equal to one
None of these
Less than one
Greater than one

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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
-140 kJ
+60 kJ
-40 kJ

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Engineering Thermodynamics
The unit of universal gas constant is

None of these

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Engineering Thermodynamics
The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)

(v1 + v2)/v2
(v1 + v2)/v1
v2/v1
v1/v2

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Engineering Thermodynamics
A perpetual motion machine is

A hypothetical machine whose operation would violate the laws of thermodynamics
A hypothetical machine
A non-thermodynamic machine
A thermodynamic machine

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