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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

Thickness
Time
Face area
Temperature difference

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Heat and Mass Transfer
Moisture would find its way into insulation by vapour pressure unless it is prevented by

Less thermal conductivity insulator
High vapour pressure
A vapour seal
High thickness of insulation

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Heat and Mass Transfer
The thermal diffusivities for solids are generally

Less than those for gases
Less than those for liquids
More or less same as for liquids and gases
More than those for liquids and gases

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Heat and Mass Transfer
The energy distribution of an ideal reflector at higher temperatures is largely in the range of

Wavelength has nothing to do with it
Longer wavelength
Remain same at all wavelengths
Shorter wavelength

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Heat and Mass Transfer
In a heat exchanger with one fluid evaporating or condensing, the surface area required is least in

Cross flow
Counter flow
Parallel flow
All of these

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Heat and Mass Transfer
The critical temperature is the temperature

Above which a gas will never liquefied
Above which a gas may explode
Below which a gas does not obey gas laws
Below which a gas is always liquefied

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MORE MCQ ON Heat and Mass Transfer

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