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     EduGorilla 
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    Hot oil at 150°C is used to pre-heat a cold fluid at 30°C in a 1 : 1 shell and tube heat exchanger. The exit temperature of the hot oil is 110°C. Heat capacities (product of mass flow rate and specific heat capacity) of both the streams are equal. The heat duty is 2 kW.

    Under co-current flow conditions, the overall heat transfer resistance (1/UA) is

    Options :-

    1. 0.4° C/W
    2. 0.04° C/W
    3. 0.36° C/W
    4. 0.036° C/W
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