INTRODUCTION TO FOOD TECHNOLOGY
FOOD SCIENCE VS FOOD TECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Conduction
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Convection
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Radiation
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None of the above
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Detailed explanation-1: -Convection in a gas It expands, becomes less dense and rises. It is replaced by the cooler, denser air which surrounds it. This air is in turn heated, expands becomes less dense and rises. The process continues, a convection current is set up and heat is transferred through the air and hence through the room.
Detailed explanation-2: -Convection is the transfer of thermal energy by particles moving through a fluid. When particles in one area of a fluid gain thermal energy, they move more quickly, have more collisions, and spread farther apart. This decreases the density of the particles, so they rise up through the fluid.
Detailed explanation-3: -Convection is the transfer of heat by the movement of a fluid (liquid or gas) between areas of different temperature.