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Heat and Mass Transfer

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

Black radiation
Full radiation
Total radiation
All of these

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Heat and Mass Transfer
The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

Stanton number
Grashoff number
Peclet number
Biot number

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

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

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Heat and Mass Transfer
The amount of heat flow through a body by conduction is

Directly proportional to the temperature difference on the two faces of the body
Directly proportional to the surface area of the body
Dependent upon the material of the body
All of these

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Heat and Mass Transfer
Heat is transferred by all three modes of transfer, viz. conduction, convection and radiation in

Electric heater
Steam condenser
Refrigerator condenser coils
Boiler

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Heat and Mass Transfer
Log mean temperature difference in case of counter flow compared to parallel flow will be

More
Less
Same
Depends on other factors

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