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Hannah heats refrigerated rice which has been devoid of moisture and become dry. She heats it in a microwave. It gets unevenly heated. What should she do?

(a) Water should be added for even heating

(b) She should heat it using equipment that offers conduction or convection

(c) None of the mentioned

(d) All of the mentioned

I have been asked this question during an interview for a job.

This is a very interesting question from Unit Operations topic in chapter Heat Transfer Equipment, Microwave Heating, Evaporation, Diffusion and Mass Transfer and Dehydration of Food Engineering

1 Answer

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Best answer
Correct choice is (a) Water should be added for even heating

The explanation: Water has a low dielectric constant due to the generation of friction due to rotation of dipoles. Hence, water should be added for even heating.

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