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Heat and Mass Transfer

Heat and Mass Transfer
An ordinary passenger aircraft requires a cooling system of capacity.

2 TR
4 TR
8 TR
10 TR

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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

Black body
Grey body
Brilliant white polished body
Red hot body

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Heat and Mass Transfer
The critical radius is the insulation radius at which the resistance to heat flow is

Maximum
Minimum
Zero
None of these

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Heat and Mass Transfer
The heat is transferred by conduction, convection and radiation in

Melting of ice
Boiler furnaces
Condensation of steam in condenser
None of these

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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
All of these
Dependent upon the material of the body
Directly proportional to the surface area of the body

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Heat and Mass Transfer
A non-dimensional number generally associated with natural convection heat transfer is

Prandtl number
Nusselt number
Weber number
Grashoff number

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