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Heat Transfer

Heat Transfer
In a boiling curve, the peak heat flux is called the __________ point.

Burnout
Boiling
Nusselt
Leidenfrost

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Heat Transfer
Planck's distribution law is valid for __________ bodies

white
all of the listed here
coloured
black

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Heat Transfer
When vaporisation takes place directly at the heating surface, it is called

all of the listed here
vapour binding
nucleate boiling
film boiling

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Heat Transfer
For a counter current heat exchanger with Tih = 80°C, T°c = 60°C, T°h = 50°C and Tic = 30°C, and the temperature difference between the two streams being the same everywhere along Z, the direction of flow of hot fluid. The temperature profile should satisfy

d²T/dZ² < 0
dT/dZ = 0
d²T/dZ² = 0
d²T/dZ² > 0

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Heat Transfer
An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is

9000
4600
4000
3000

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Heat Transfer
Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.

laminar
transition
None of the listed here
highly turbulent

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