Timber Defects: Moisture Content and Wood Properties
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Questions and Answers

What is the term for the process of drying out water from timber?

  • Seasoning (correct)
  • Wood refining
  • Moisture content regulation
  • Wood preservation

What is the purpose of setting the grain of each veneer at right angles to the other side in plywood?

  • To provide strength in one direction only
  • To minimize thermal movement and provide strength in both directions (correct)
  • To reduce the cost of production
  • To increase the weight of the plywood

What is the term for the point at which the cell walls of wood are saturated with water?

  • Fiber saturation point (correct)
  • Oven-dry point
  • Equilibrium moisture content
  • Moisture content regulation

What is the term for the percentage of water in wood, calculated by comparing the weight of the wood before and after oven-drying?

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

What is the purpose of using temperature kilns in wood drying?

<p>To dry the wood to a specified moisture content (B)</p> Signup and view all the answers

What is the term for wood that has been dried to a specified moisture content?

<p>Seasoned timber (B)</p> Signup and view all the answers

What is the main component of wood?

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

What is the classification of trees based on their leaves?

<p>Hardwood and Softwood (D)</p> Signup and view all the answers

What is the characteristic of wood that makes it stronger when used under tension?

<p>Fibrous and elastic (D)</p> Signup and view all the answers

What is the term for wood that has been processed by a mill for construction?

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

What is the term for wood that undergoes varying degrees of moisture movement?

<p>Moisture-sensitive wood (B)</p> Signup and view all the answers

What is the characteristic of straight-grain wood compared to irregular grain wood?

<p>Stronger and easier to work with (B)</p> Signup and view all the answers

What happens to plywood when exposed to extreme heat?

<p>It undergoes charring and hollowing (C)</p> Signup and view all the answers

What is a characteristic of chipboard that makes it susceptible to damage?

<p>Its short wood fibers (A)</p> Signup and view all the answers

What is a benefit of using glulam over traditional timber?

<p>It can be manufactured in any size and shape (B)</p> Signup and view all the answers

What is a common use for chipboard?

<p>Building low-cost indoor furniture (B)</p> Signup and view all the answers

How are the grains of glulam aligned?

<p>Parallel to each other (B)</p> Signup and view all the answers

Why is chipboard prone to moisture damage?

<p>Because its board fibers absorb moisture easily (B)</p> Signup and view all the answers

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