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In case of design of a shell and tube heat exchanger, | |
A. | minimum cleaning lane of 6.5 mm is provided, when tubes are on a square pitch. [Wrong Answer] |
B. | minimum tube sheet thickness (in which tubes are fixed) is equal to the O.D. of the tube upto 15 mm tube diameter; and for > 15 mm tube diameter, tube sheet thickness is smaller than tube diameter. [Wrong Answer] |
C. | O.D. of the tube is 6 to 40 mm while the tube lengths used are 0.5, 2.5, 3.0, 4.0, 5.0, 6 metres. [Wrong Answer] |
D. | all (a), (b) & (c). [Correct Answer] |