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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
Convection
Conduction
None of these

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Heat and Mass Transfer
Which of the following is a case of steady state heat transfer?

None of these
Heating of building in winter
I.C. engine
Air preheaters

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Heat and Mass Transfer
The unit of overall coefficient of heat transfer is

kcal/m² hr °C
kcal/hr °C
kcal/m hr °C
kcal/m²

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Heat and Mass Transfer
When heat is transferred from one particle of hot body to another by actual motion of the heated particles, it is referred to as heat transfer by

Conduction and convection
Conduction
Radiation
Convection

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Heat and Mass Transfer
In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the

Reynold's number, Grashoff's number
Reynold's number
Prandtl number, Grashoff's number
Grashoff's number

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

Stanton number
Biot number
Prandtl number
Grashoff number

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