19) Absolute zero pressure will occur

Answer is:

when molecular momentum of the system becomes zero

Engineering Thermodynamics MCQ with Answers

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20) No liquid can exist as liquid at

Answer is:

zero pressure

21) The unit of power in S.I. units is

Answer is:

watt

22) The condition of perfect vacuum, i.e., absolute zero pressure can be attained at

Answer is:

a temperature of - 273.16°C

Explanation:

The lower the temperature, the lower the pressure inside of the sphere. If the exact values were plotted out, a linear relationship would be apparent. Extrapolating this line to the point where there would be no pressure yields absolute zero, which is about -273.15 degrees Celsius.