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Heat Transfer

Heat Transfer
Fourier's law applies to the heat transfer by

None of the listed here
radiation
conduction
convection

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Heat Transfer
The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium. This is __________ law.

Stefan-Boltzman
Kirchoffs
Wien's displacement
Planck's

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Heat Transfer
An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a

heat exchanger
recuperator
regenerator
boiler

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Heat Transfer
A __________ evaporator employs an annular downtake.

Long tube vertical
Horizontal
Basket type
None of these

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Heat Transfer
A body cools down from 75°C to 70°C in 10 minutes. It will cool down from 70° C to 65° C in __________ minutes.

10
Either B or C, depends on the mass of the body
>10

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Heat Transfer
The Grashoff number is defined as the ratio of the

buoyancy to surface tension forces
inertial to viscous forces.
buoyancy to inertial forces
buoyancy to viscous forces

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