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Thermodynamics ...

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  • Question 1
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    Refrigerators X and Y are removing 1000 J of heat from the freezer. Refrigerator X is working between -5° C and 25° C and refrigerator Y is working between -20° C and 20 °C. Find efficiency of refrigerator X and Y?

  • Question 2
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    Kelvin- Planck statement states that

  • Question 3
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    Which of the following is an example of heat pump?

  • Question 4
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    For proper utilization of exergy, it is desirable to make first law efficiency ____ and the source and use temperatures should ____.

  • Question 5
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    The second law of thermodynamics says

  • Question 6
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    If the door of refrigerator is left open inside a closed room, what would happen to the temperature of the room?

  • Question 7
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    Refrigerator transfers heat from the cold cooling coils to warm surroundings, which law of thermodynamics favour this process

  • Question 8
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    Which word is defined by this statement: A measure of this disorder, or randomness?

  • Question 9
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    What amount of work is needed to freeze 1 gm of water at 0˚C in a refrigerator .The temperature of surroundings is 320 K?

  • Question 10
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    The coefficient of performance of a refrigerator is given by

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