In pipe flow, heat is transferred from hot wall to the liquid by__________________?
Correct answer: A. Forced convection and conduction
- A. Forced convection and conduction
- B. Forced convection only
- C. Conduction only
- D. Free and forced convection
Explanation
Heat first crosses the stationary fluid layer next to the wall by conduction, then is carried through the moving liquid by forced convection. Thus both mechanisms are involved in pipe flow.
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