DT RM Wood 1

The classification of natural timber is by two groups: hardwoods and softwoods. Which one of the following is the correct statements to describe hardwood & softwood?

• Softwood comes from deciduous trees: trees that shed leaves in autumn. Hardwoods come from trees that are coniferous: evergreen trees that bear cones and have needles.

• Softwood comes from trees that are coniferous: evergreen trees that bear cones and have needles. Hardwoods come from deciduous trees: trees that shed leaves in autumn.

• Softwood show a wide range of colours and gain patterns. Hardwoods grow mainly in colder and cooler temperate climates (including Scandinavia, Canada, Northern Russia, and at high altitudes elsewhere.

An illustration showing above is how planking trees can affect grain structures in finished lengths of timber. Planks that have a wood grain that is closer together are stronger and denser (heavier) than those with a wider spaced wood grain running through it.Name the method of sawing A and B?

• Plain and Quarter sawing

• Slash and Radial sawing

• Radial and Quarter sawing

• Quarter and Plain sawing

Seasoning is the removal of excess moisture from the wood by drying it after conversion. What is the name of seasoning method shown?

• Kiln seasoning

• Air seasoning

• Traditional seasoning method

• Warping

Which one of the following are advantages of Air seasoning. (You may choose more than one)

• It takes only a few days or weeks and kills insect eggs in the wood.

• It is expensive to build and to run.

• It is cheap

• It needs little skilled attention.

Warping is the general name for any distortion from the true shape. Which one of the following is the correct order for the four ways in which wood warps as shown in the picture.

• 1. Bowing 2. Twisting 3. Cupping 4. Springing
• 1. Springing 2. Twisting 3. Bowing 4. Springing
• 1. Cupping 2. Bowing 3. Springing 4. Twisting
• 1. Cupping 2. Springing 3. Twisting 4. Bowing

Shakes. The separation of adjoining layers of wood usually caused by strong winds, poor felling, or shrinkage. Which one of the following is the correct picture to show shakes?

• 
• 
• 
• 

Knots are where branches grew from the tree causes the formation of holes in the wood as shown in the picture. It

• strengthen the timber

• weakens the timber

Choose two (2) properties of Pine.

• Very Strong

• Easy to work with

• Difficult to work with

• Fairly strong

This wood is to use to make frames of doors and windows

• Cedar

• Pine

• Spruce

• Hardwood

Why are Redwoods are used in making of furniture such as shelves and cupboards

• Relatively strong

• Hard and fairly strong

• Attractive appearance.

• Expensive