_____________ heat exchanger is also known as 'hair pin type' exchanger?
Correct answer: A. Double pipe
- A. Double pipe
- B. Finned
- C. Plate type
- D. Regenerative
Explanation
A double-pipe exchanger consists of one pipe inside another, with the flow reversing through a return leg in the common hairpin arrangement. Finned and plate exchangers do not have this characteristic U-shaped construction.
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