Woodchips and Pulping Processes Quiz
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Questions and Answers

What is the purpose of wood chipping in the pulp and paper industry?

  • To provide uniform sized wood chips for pulping (correct)
  • To refine the wood chips into mechanical pulp
  • To extract useful fibers from the bark
  • To grind small wood logs into stone pulp

    • Which part of the wood is most useful for making pulp?

  • The roots
  • The heartwood and sapwood (correct)
  • The bark
  • The leaves

    • What is the purpose of steaming the wood chips prior to refining?

  • To increase the energy needed to make the pulp
  • To make the wood chips more uniform in size
  • To decrease the total energy needed to make the pulp (correct)
  • To increase the damage to the wood fibers

    • What is the difference between refiner mechanical pulp (RMP) and thermomechanical pulp (TMP)?

    <p>RMP is steamed while TMP is not</p> Signup and view all the answers

    What type of products are mechanical pulps typically used for?

    <p>Products that require low strength, such as newsprint and paperboards</p> Signup and view all the answers

    What is the moisture content of wood chips during the thermomechanical pulp process?

    <p>25–30 percent</p> Signup and view all the answers

    What is the main goal of pre-treating wood chips with chemicals in the chemi-thermomechanical pulp process?

    <p>To make the fibers easier to refine</p> Signup and view all the answers

    What is the main function of digesters in the production of chemical pulp?

    <p>To break down lignin with heat and chemicals</p> Signup and view all the answers

    What is the primary purpose of recycling paper into deinked pulp (DIP)?

    <p>To remove unwanted elements like inks</p> Signup and view all the answers

    Which process results in fibers that are hard and rigid due to the fact that lignin is not removed?

    <p>Chemi-thermomechanical pulp process</p> Signup and view all the answers

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