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

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Engineering Thermodynamics
The work ratio of a gas turbine plant is given by

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

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Engineering Thermodynamics
According to Avogadro's Hypothesis

Gases have two values of specific heat
The molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature
The sum of partial pressure of mixture of two gases is sum of the two
Product of the gas constant and the molecular weight of an ideal gas is constant

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