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Heat and Mass Transfer

Heat and Mass Transfer
The value of Prandtl number for air is about

1.7
0.3
0.1
0.7

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Heat and Mass Transfer
Thermal conductivity of wood depends on

Moisture
All of these
Temperature
Density

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Heat and Mass Transfer
According to Dalton's law of partial pressures, (where pb = Barometric pressure, pa = Partial pressure of dry air, and pv = Partial pressure of water vapour)

Pb = pa/pv
Pb = pa × pv
Pb = pa + pv
Pb = pa - pv

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Heat and Mass Transfer
Thermal conductivity of glass wool varies from sample to sample because of variation in

Composition
All of these
Porosity
Density

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Heat and Mass Transfer
Which of the following is expected to have highest thermal conductivity?

Melting ice
Solid ice
Water
Steam

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Heat and Mass Transfer
In free convection heat transfer, Nusselt number is function of

Grashoff number and Reynold number
Grashoff number and Prandtl number
Grashoff number, Prandtl number and Reynold number
Prandtl number and Reynold number

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