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Engineering Thermodynamics

Engineering Thermodynamics
A tri-atomic molecule consists of __________ atoms.

Two
Three
Four
One

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Engineering Thermodynamics
Second law of thermodynamics defines

Entropy
Heat
Work
Internal energy

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Engineering Thermodynamics
The heat and work are mutually convertible. This statement is called ___ law of thermodynamics.

Second
First
Zeroth
Third

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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
When the gas is heated at constant volume, the heat supplied

None of these
Increases the internal energy of the gas and increases the temperature of the gas
Both (A) and (B)
Does some external work during expansion

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Engineering Thermodynamics
The efficiency of Carnot cycle is maximum for

Gas engine
Steam engine
Reversible engine
Petrol engine

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