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Heat and Mass Transfer

Heat and Mass Transfer
In case of liquids and gases, the heat transfer takes place according to

Radiation
None of these
Conduction
Convection

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Heat and Mass Transfer
In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by

°C (temperature)
Hr (time)
Sq. m (area)
K.cal (heat)

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Heat and Mass Transfer
Heat transfer takes place as per

Kirchoff's law
First law of thermodynamic
Zeroth law of thermodynamics
Second law of the thermodynamics

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Heat and Mass Transfer
Depending on the radiating properties, a body will be white when(Where a = absorptivity, p = reflectivity, x = transmissivity)

X = 0, a + p = 1
P = 0, x = 1 and a = 0
P = 0, x = 0 and a = 1
P=1, T = 0 and a = 0

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Heat and Mass Transfer
An ordinary passenger aircraft requires a cooling system of capacity.

10 TR
8 TR
2 TR
4 TR

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Heat and Mass Transfer
The natural convection air cooled condensers are used in

Water coolers
All of these
Room air conditioners
Domestic refrigerators

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