Which of the following is the simplest form of heat exchanger?
A. Air-cooled
B. Plate-and-frame
C. Double-pipe
D. Shell-and-tube
A. Incorrect. A double-pipe heat exchanger is the simplest form of heat exchanger.
B. Incorrect. A double-pipe heat exchanger is the simplest form of heat exchanger.
C. Correct. A double-pipe heat exchanger is the simplest form of heat exchanger.
D. Incorrect. A double-pipe heat exchanger is the simplest form of heat exchanger.
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