Heat Transfer
In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger.

Twice
Thrice
Four times
Once

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Heat Transfer
In the equation Q = UAΔt; Δt is

Logarithmic mean temperature difference
Geometric mean temperature difference
The difference of average bulk temperatures of hot and cold fluids
Arithmetic mean temperature difference

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