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Timber Defects: Moisture Content and Wood Properties

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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?

Moisture content Signup and view all the answers

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

To dry the wood to a specified moisture content Signup and view all the answers

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

Seasoned timber Signup and view all the answers

What is the main component of wood?

Cellulose Signup and view all the answers

What is the classification of trees based on their leaves?

Hardwood and Softwood Signup and view all the answers

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

Fibrous and elastic Signup and view all the answers

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

Lumber Signup and view all the answers

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

Moisture-sensitive wood Signup and view all the answers

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

Stronger and easier to work with Signup and view all the answers

What happens to plywood when exposed to extreme heat?

It undergoes charring and hollowing Signup and view all the answers

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

Its short wood fibers Signup and view all the answers

What is a benefit of using glulam over traditional timber?

It can be manufactured in any size and shape Signup and view all the answers

What is a common use for chipboard?

Building low-cost indoor furniture Signup and view all the answers

How are the grains of glulam aligned?

Parallel to each other Signup and view all the answers

Why is chipboard prone to moisture damage?

Because its board fibers absorb moisture easily Signup and view all the answers