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Engineering Thermodynamics

Engineering Thermodynamics
The state of a substance whose evaporation from its liquid state is complete, is known as

Air
Vapour
Perfect gas
Steam

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Engineering Thermodynamics
The oxygen atom is ________ times heavier than the hydrogen atom.

16
2
8
32

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Engineering Thermodynamics
One kg of carbon requires 4/3 kg of oxygen and produces ________ kg of carbon monoxide gas.

44138
44142
44015
44046

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Engineering Thermodynamics
The compression ratio for petrol engines is

15 to 30
3 to 6
5 to 8
10 to 20

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Engineering Thermodynamics
Change in enthalpy of a system is the heat supplied at

Constant pressure
Constant entropy
Constant temperature
Constant volume

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Engineering Thermodynamics
For same compression ratio and for same heat added

Diesel cycle is more efficient than Otto cycle
Otto cycle is more efficient than Diesel cycle
Efficiency depends on other factors
Both Otto and Diesel cycles are equally efficient

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