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Que. An oil cooler in a high performance engine has an outside surface area 0.12 m² and a surface temperature of 65 degree Celsius. At any intermediate time air moves over the surface of the cooler at a temperature of 30 degree Celsius and gives rise to a surface coefficient equal to 45.4 W/ m² K. Find out the heat transfer rate?
a. 238.43 W
b. 190.68 W
c. 543.67 W
d. 675.98 W
Correct Answer:190.68 W
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