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Heat and Mass Transfer

Heat and Mass Transfer
Pick up the wrong case. Heat flowing from one side to other depends directly on

Time
Temperature difference
Face area
Thickness

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Heat and Mass Transfer
The total radiation from a black body per second per unit area is ________ fourth power of the absolute temperature. This statement is known as Stefan Boltzmann law.

Inversely proportional to
None of these
Equal to
Directly proportional to

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Heat and Mass Transfer
According to Newton's law of cooling, the heat transfer from a hot body to a cold body is

Directly proportional to the surface area
Either (A) or (B)
Directly proportional to the difference of temperatures between the two bodies
Both (A) and (B)

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Heat and Mass Transfer
Heat conducted through per unit area and unit thick face per unit time when temperature difference between opposite faces is unity, is called

Thermal coefficient
Thermal resistance
Temperature gradient
Thermal conductivity

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Heat and Mass Transfer
Which of the following is expected to have highest thermal conductivity?

Melting ice
Water
Steam
Solid ice

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Heat and Mass Transfer
The heat transfer takes place according to

Zeroth law of thermodynamics
First law of thermodynamics
Kirchhoff's law
Second law of thermodynamics

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