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Heat and Mass Transfer

Heat and Mass Transfer
The highest thermal diffusivity is of

Lead
Iron
Wood
Concrete

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Heat and Mass Transfer
Heat transfer takes place as per

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

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Heat and Mass Transfer
Which of the following is the case of heat transfer by radiation?

Heating of building
Heat received by a person from fireplace
Blast furnace
Cooling of parts in furnace

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Heat and Mass Transfer
The radiation emitted by a black body is known as

Full radiation
Black radiation
Total radiation
All of these

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Heat and Mass Transfer
Metals are good conductors of heat because

Their atoms collide frequently
They have high density
They contain free electrons
Their atoms are relatively far apart

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Heat and Mass Transfer
In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in

Counter flow
Cross flow
Parallel flow
All of these

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