Food Packaging and Cryogenic Immersion Quiz
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Questions and Answers

What is the process of preserving food by freezing it either through immersion in a freezing liquid or by spraying with a freezing agent?

  • Cryogenic immersion (correct)
  • Fluid immersion
  • Liquid immersion
  • Solid immersion
  • In calculating the net present value (NPV) of an investment, what is considered to ensure the investment is sustainable?

  • GHC 35025010.50
  • GHC 35025.01
  • GHC 53502501.05
  • GHC 5350250.11 (correct)
  • When considering the direction of heat transfer, if the product temperature is -18°C and the ambient temperature is 25°C, which direction does heat transfer occur?

  • From the environment to the product
  • From the refrigerant to the product
  • From the product to the environment (correct)
  • From refrigerant to the environment
  • Which of the following is NOT an example of a refrigerant?

    <p>Coal (A)</p> Signup and view all the answers

    What factor affects the rate of drying in a drying process?

    <p>All of the above (D)</p> Signup and view all the answers

    In an exergy calculation, if the temperatures of the ambient air and the product are 120°C and 70°C respectively, what is the percentage loss of exergy if the temperature is 298 K?

    <p>12 kW (A)</p> Signup and view all the answers

    What is the Net Present Value (NPV) of the investment in the fruit juice production system?

    <p>GHC 232.00 x 10 (A)</p> Signup and view all the answers

    How much did the investor make as yearly return?

    <p>GHC 24.03 x 10 (D)</p> Signup and view all the answers

    What is the cost per fruit juice bottle if the system can produce 25,000 bottles a year?

    <p>GHC 635.01 (A)</p> Signup and view all the answers

    What is the rate of heat removal needed to maintain the temperature known as *****?

    <p>Cooling load (C)</p> Signup and view all the answers

    For cans of pea puree with Fo = -2.45 min and Z = 9.94 °C, what is the process time for sterilization at 112.8°C at the can's center?

    <p>16.76 min (B)</p> Signup and view all the answers

    How does the thickness of the surface material affect heat flow according to the text?

    <p>Has no influence on heat flow (A)</p> Signup and view all the answers

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