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Heat and Mass Transfer

Heat and Mass Transfer
Stefan Boltzmann law is applicable for heat transfer by

Conduction and radiation combined
Conduction
Convection
Radiation

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Heat and Mass Transfer
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as

Intensity of radiation
Transmissivity
Emissivity
Reflectivity

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Heat and Mass Transfer
The use of heat exchangers is made in

Radiators in automobile
Condensers and boilers in steam plants
All of these
Condensers and evaporators in refrigeration and air conditioning units

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

Nusselt number
Weber number
Grashoff number
Prandtl number

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Heat and Mass Transfer
According to Stefan's law, the total radiation from a black body per second per unit area is proportional to

T
T5
T2
Absolute temperature

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Heat and Mass Transfer
Two balls of same material and finish have their diameters in the ratio of 2: 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to smaller one will be in the ratio of

0.042361111111111
0.16736111111111
0.084027777777778
0.043055555555556

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MORE MCQ ON Heat and Mass Transfer

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