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Heat Transfer

Heat Transfer
Heat flux is the time rate of heat transfer per unit

length
area
volume
none of the listed here

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

18537
1000-1500
5000-15000
100-500

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Heat Transfer
The ratio of momentum diffusivity to thermal diffusivity is the __________ number.

Nusselt
Stanton
Grashoff
Prandtl

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Heat Transfer
Increasing the liquor level in the evaporator results in the

decreased capacity
decreased effect of hydrostatic head
increase in liquor film co-efficient
increased true temperature drop

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Heat Transfer
Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is

In the central core of the fluid
Uniformly distributed throughout the fluid
None of these
Mainly confined to a thin film of fluid near the surface

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Heat Transfer
The equation, (NSt x N2/3Pr) = f/2, is the __________ analogy.

Reynolds
None of these
Prandtl
Colburn

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