21. |
When the closed system is allowed to undergo a spontaneous change from a given state to a dead state, its exergy is ____ destroyed ____ producing useful work.
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Answer:
Option (d) |
22. |
The exergy of an isolated system can ________.
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Answer:
Option (c) |
23. |
For a closed system, availability or exergy transfer occurs through
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Answer:
Option (c) |
24. |
The first law of efficiency
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Answer:
Option (a) |
25. |
The first law efficiency is defined as
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Answer:
Option (d) |
26. |
Second law efficiency is defined as
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Answer:
Option (b) |
27. |
Two engines having same thermal efficiency but supplied with heat from a source at different temperatures
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Answer:
Option (d) |
28. |
Second law efficiency can also be given as
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Answer:
Option (d) |
29. |
Which of the following statement is true?
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Answer:
Option (d) |
30. |
Which of the following is true?
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Answer:
Option (c) |