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Heat and Mass Transfer

Heat and Mass Transfer
The concept of overall coefficient of heat transfer is used in heat transfer problems of

Conduction and convection
Conduction
Convection
Radiation

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

All of these
Domestic refrigerators
Water coolers
Room air conditioners

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Heat and Mass Transfer
According to Kirchoff's law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a

Brilliant white polished body
Black body
Grey body
Red hot body

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Heat and Mass Transfer
LMTD in case of counter flow heat exchanger as compared to parallel flow heat exchanger is

Higher
Same
Lower
Depends on the area of heat exchanger

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Heat and Mass Transfer
The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is

Greater than one
Equal to Nusselt number
Less than one
Equal to one

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Heat and Mass Transfer
The process of heat transfer from one particle of the body to another by the actual motion of the heated particles, is called

Conduction
None of these
Radiation
Convection

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MORE MCQ ON Heat and Mass Transfer

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