Food Drying By Debomitra Dey
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Questions and Answers

What is the initial phase where there is no loss of moisture and the food reaches wet bulb temperature?

  • Initial Settling Down (correct)
  • Falling Rate Period
  • Constant Rate Period
  • Critical Moisture content
  • What type of water in food exerts vapor pressure less than liquid water at the same temperature?

  • Unbound water
  • Bound water (correct)
  • Equilibrium water
  • Free moisture
  • What marks the end of the drying process where the rate of drying falls significantly?

  • Initial Settling Down
  • Falling Rate Period (correct)
  • Constant Rate Period
  • Critical Moisture Content
  • What is the moisture content after equilibration with specified conditions of temperature and humidity called?

    <p>Equilibrium Moisture content</p> Signup and view all the answers

    Which factor influences the drying rate of food by determining the vapor pressure of water at the drying temperature?

    <p>Vapor pressure of water at drying temperature</p> Signup and view all the answers

    Where is unbound water primarily held in food?

    <p>In voids of the solid</p> Signup and view all the answers

    Which method is preferred over others due to the retention of colour, aroma, nutritional constituents, and flavour?

    <p>Osmotic dehydration</p> Signup and view all the answers

    What are the most important products made from fruits in the market?

    <p>Murabbas, candies, and sweets made by osmosis in sugar syrup</p> Signup and view all the answers

    Which type of drying method involves stable gas-liquid foam as a prerequisite?

    <p>Foam drying</p> Signup and view all the answers

    What changes occur during the drying process that influences drying rates?

    <p>Movement of solids</p> Signup and view all the answers

    Which method involves forming liquid foods into a stable foam by adding a stabilizer?

    <p>Foam mat drying</p> Signup and view all the answers

    What type of gas-liquid foam is used in foam drying methods?

    <p>Stable foam</p> Signup and view all the answers

    What is the main purpose of dehydrating food?

    <p>To remove water from the food to prevent microbial growth</p> Signup and view all the answers

    How does dehydration contribute to food preservation?

    <p>By removing water necessary for microbial growth and enzymatic activity</p> Signup and view all the answers

    What is the relationship between water activity and food stability?

    <p>Lower water activity extends the shelf life of dried foods</p> Signup and view all the answers

    How is moisture content typically expressed in food?

    <p>Either in wet basis or dry basis</p> Signup and view all the answers

    What is water activity defined as in relation to food dehydration?

    <p>The ratio of vapor pressure of food to vapor pressure of water at the same temperature</p> Signup and view all the answers

    Why does removing water from food contribute to preservation?

    <p>It creates an environment unfavorable for microbial growth by increasing osmotic pressure</p> Signup and view all the answers

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