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In the case of a shell and tube heat exchanger, the logarithmic mean temperature difference | |
A. | is always less than arithmetic average value. [Correct Answer] |
B. | is always more than arithmetic mean value and the geometric mean value. [Wrong Answer] |
C. | is always less than arithmetic mean value, but more than geometric mean value. [Wrong Answer] |
D. | may be either more or less than geometric mean and arithmetic mean value depending upon whether the flow of stream is co-current or counter-current. [Wrong Answer] |