Engineering Thermodynamics
The absolute zero pressure will be

At sea level
When molecular momentum of the system becomes zero
At the temperature of - 273 K
At the center of the earth

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Engineering Thermodynamics
The efficiency of a gas turbine is given by

(Net work output)/(Heat supplied)
(Isentropic increase in temperature)/(Actual increase in temperature)
(Net work output)/(Work-done by the turbine)
(Actual temperature drop)/(Isentropic temperature drop)

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Engineering Thermodynamics
The door of a running refrigerator inside a room was left open. Which of the following statements is correct?

The room will be cooled very slightly
The temperature of the air in room will remain unaffected
The room will be cooled to the temperature inside the refrigerator
The room will be gradually warmed up

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