Overall heat transfer co-efficient of a particular tube is U₁. If the same tub

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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

Options:

A . U₁ = U₂

B . U₂ > U₁

C . U₁ > U₂

D . U₁ = dirt factor - U₂

Answer: Option A

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