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Heat Transfer

Heat Transfer
In forced convection, the Nusselt number is a function of

Re and Gr
Re and Sc
Re and Pr
Pr and Gr

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Heat Transfer
Minimum recommended baffle spacing in a shell and tube heat exchanger is about (where, D = shell diameter)

0.5 D
0.3 D
0.2 D
0.4 D

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Heat Transfer
Heat transfer by conduction in the turbulent core of a fluid flowing through a heated pipe is negligible, if the value of Prandtl number is

0.2
0.8
0.4
0.6

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Heat Transfer
Which of the following is not used as a medium for high temperature heating ?

None of the listed here
mercury
liquid metal
dowtherm

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Heat Transfer
The capacity of double-effect evaporator is less than half of the capacity of two single effects, each of which is operating over same terminal temperature difference, when the

Solution has an elevation of boiling point
Evaporators opreate at atmospheric pressure
None of these
Evaporators operate under vacuum

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Heat Transfer
Fruit juice (a heat sensitive material) can be concentrated in a __________ evaporator.

Long tube
Falling film
None of these
High pressure

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