Hot Air Dryers
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Questions and Answers

Which type of dryer is the most widely used in food drying?

  • Cabinet batch type dryer
  • Solar air dryer
  • Hot air dryer (correct)
  • Steam heat exchanger dryer

    • What are the sources of heat for hot air dryers?

  • Natural gas burners, solar energy, electrical coils
  • Solar energy, electrical coils, steam heat exchangers
  • Electrical coils, steam heat exchangers, natural gas burners (correct)
  • Steam heat exchangers, natural gas burners, solar energy

    • What is the typical operating temperature range for hot air dryers?

  • 100C to 120C
  • 20C to 40C
  • 40C to 80C (correct)
  • 80C to 100C

    • During which drying period does the product temperature begin to increase?

    <p>Falling rate drying</p> Signup and view all the answers

    What is the purpose of the length of tunnel between the heaters and food in a hot air dryer?

    <p>To ensure uniform heating</p> Signup and view all the answers

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