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Heat and Mass Transfer

Heat and Mass Transfer
Unit of thermal conductivity in S.I. units is

Option (B) and (C) above
W/m °K
J/m² sec
J/m °K sec

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Heat and Mass Transfer
The value of the wavelength for maximum emissive power is given by

Wien’s law
Planck's law
Fourier's law
Stefan's law

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

Temperature difference
Time
Face area
Thickness

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

Water
Melting ice
Steam
Solid ice

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Heat and Mass Transfer
Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium.

Smaller body to larger body
Larger body to smaller body
Cold body to hot body
Hot body to cold body

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Heat and Mass Transfer
The value of Prandtl number for air is about

0.3
0.1
1.7
0.7

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