What is the value of overall heat transfer coefficient for air to heav

1.	What is the value of overall heat transfer coefficient for air to heavy tars and liquid?
A.	As low as 45 W/m² K
B.	As low as 40 W/m² K
C.	As low as 35 W/m² K
D.	As low as 30 W/m² K
Answer» B. As low as 40 W/m² K

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What is the value of overall heat transfer coefficient for air to heavy tars and liquid?

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