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The clearance between two tubes in a shell and tube heat exchanger is known as 'ligament', whose minimum value is __________ the outside diameter of the tube, but in no case it should be less than 4.5 mm. | |
A. | equal to [Wrong Answer] |
B. | half [Wrong Answer] |
C. | one fourth [Correct Answer] |
D. | three fourth [Wrong Answer] |