Claude gas liquefaction process employs cooling___________________?
Correct answer: C. By expansion in an engine
- A. At constant pressure
- B. By throttling
- C. By expansion in an engine
- D. None of these
Explanation
The Claude process produces cooling mainly by allowing gas to expand in an engine, where it performs work and falls in temperature. Throttling is characteristic of the Joule-Thomson step, not the main Claude expansion method.
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