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The temperatures of the source and the s...

The temperatures of the source and the sink of a heat engine are `127^@C` and `27^@C` respectively. An inventor claims its efficiency to be `30%` then

A

it is impossible

B

it is possible with high probability

C

it is possible with low probability

D

data is insufficient

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The correct Answer is:
A
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MBD PUBLICATION-THERMODYNAMICS-QUESTION BANK
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  3. The temperatures of the source and the sink of a heat engine are 127^@...

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  4. Ina Carnot engine, the temperature of the reservoir is 927^@C and that...

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  5. In an ideal refrigerator, heat from inside at 280 K is transferred to ...

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  6. The inside and outside temperatures of a refrigerator are 273 K and 30...

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  7. The temperature of a refrigerator is kept at7^@C to keep the food arti...

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  8. A refrigerator abstracts 1600 calories of heat from the ice trays. The...

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  9. A carnot engine has an efficiency of 20%. The energy is supplied to th...

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  10. For a carnot engine the source and the sink temperatures are 527^@C an...

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  11. A carnot engine operates between 227^@C and 127^@C. It absorbs 80 kilo...

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  12. The efficiency of a heat engine is 50% and the temperature of the sink...

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  13. A carnot engine whose sink is at 300^@ K has an efficiency of 40%. By ...

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  14. What is the least amount of work that must be done to freeze ten gram ...

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  15. The efficiency of a heat engine is eta and the coefficient of performa...

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  16. A carnot engine, having an efficiency eta=1/10as heat engine, is used ...

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  17. One gm of water at 373 K is converted into steam at the same temperatu...

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  18. Calculate the change in internal energy when 0.15 kg of air heated fro...

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  19. Calculate the minimum work that must be done to compress 1.0 gm of hyd...

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  20. One gram mole of oxygen gas at 127^@C expands isothermally until its v...

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