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Heat and Mass Transfer

Heat and Mass Transfer
Heat is closely related with

Entropy
Energy
Liquids
Temperature

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Heat and Mass Transfer
A heat exchanger with heat transfer surface area A and overall heat transfer coefficient U handles two fluids of heat capacities Cmax and Cmin. The number of transfer units (NTU) used in the analysis of heat exchanger is specified as

U.Cmin
U/A.Cmin
Cmin/U
U/Cmin

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Heat and Mass Transfer
The heat transfer takes place according to

Kirchhoff's law
Second law of thermodynamics
Zeroth law of thermodynamics
First law of thermodynamics

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Heat and Mass Transfer
Two plates spaced 150 mm apart are maintained at 1000°C and 70°C. The heat transfer will take place mainly by

Free convection
Radiation
Forced convection
Convection

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Heat and Mass Transfer
Thermal conductivity of water in general with rise in temperature

Remain constant
Decreases
Increases
May increase or decrease depending on temperature

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Heat and Mass Transfer
The ratio of surface convection resistance to the internal conduction resistance is known as

Biot number
Prandtl number
Grashoff number
Stanton number

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MORE MCQ ON Heat and Mass Transfer

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