GATE XE 2021 Paper 1 — page 30

Questions 88–90 of 175. Imported answers require review unless explicitly marked reviewed.

A refrigerator working on a reversed Carnot cycle has a Coefficient of Performance (COP) of 4. If it works as a heat pump and consumes work input of 1 kW, the heating effect will be:

Your answerChoose one option.

1 kW

4 kW

5 kW

6 kW

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The liquid phase of a pure substance is termed as ____________, if its temperature is lower than the saturation temperature corresponding to its pressure

Your answerChoose one option.

super-heated liquid

sub-cooled liquid

metastable liquid

flashing liquid

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Two air streams of mass flow rates

and

enter a mixing chamber and exit after perfect mixing. The corresponding temperatures of the inlet streams are

and

, respectively. Heat loss rate from the mixing chamber to the surrounding is

. Assume that the process is steady, specific heat capacity is constant, and air behaves as an ideal gas. Identify the correct expression for the final exit temperature

after mixing. The mass specific heat capacities of the gas at constant volume and constant pressure are

and

, respectively. Neglect the bulk kinetic and potential energies of the streams.

Your answerChoose one option.

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2021 · Paper 1

Question 1

Question 2

Question 3