Overall Heat Transfer Co-Efficient of a Particular Tube Is U1

question 7

Multiple Choice

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then

• A)U1 = U2
• B)U2 > U1
• C)U1 > U2
• D)U1 = dirt factor - U2

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