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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)?

RMP is steamed while TMP is not (A) Signup and view all the answers

What type of products are mechanical pulps typically used for?

Products that require low strength, such as newsprint and paperboards (B) Signup and view all the answers

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

25–30 percent (A) Signup and view all the answers

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

To make the fibers easier to refine (A) Signup and view all the answers

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

To break down lignin with heat and chemicals (C) Signup and view all the answers

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

To remove unwanted elements like inks (A) 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?

Chemi-thermomechanical pulp process (A) Signup and view all the answers

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