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Heat Transfer

Heat Transfer
Steam side heat transfer co-efficient in an evaporator is in the range of __________ kcal/hr.m²°C.

18537
5000-15000
100-500
1000-1500

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Heat Transfer
_______ paint has the maximum absorption coefficient.

Yellow
Black
Grey
White

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Heat Transfer
Economy of a multiple effect evaporator is not influenced much by the

ratio of the weight of the thin liquor to thick liquor
rate of heat transfer
temperature of the feed
boiling point elevations

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Heat Transfer
Which of the following has the lowest overall heat transfer co-efficient?

Water
Molten sodium
Dowtherm
Air

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Heat Transfer
Reynold's analogy states that

Nst α f
NNu α f
Nst α NRe
NRe α f

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Heat Transfer
Peclet number (Pe) is given by

Pe = Re.Pr
Pe = Nu.Re
Pe = Pr/Re
Pe = Re/Pr

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