Woodworking 1 Sec. 3

Which lumber defect can be caused by improper seasoning and storage?

• A. knots

• B. machine burns

• C. pitch pockets

• D. warpage

Which is a natural defect in lumber?

• A. knot

• B. machine burn

• C. raised grain

• D. torn grain

Which part of a tree protects it from weather, insects, and disease?

• A. bark

• B. roots

• C. sap

• D. trunk

Which type of wood is derived from deciduous, or broad-leaved, trees?

• A. hardwood

• B. plywood

• C. sapwood

• D. softwood

Which quality gives plywood its strength in all directions?

• A. All layers are oriented in the same direction.

• B. Each layer is alternated by 90°.

• C. There are few layers.

• D. There are many layers.

The core of a sheet of plywood can be located:

• A. inside the sheet between veneers.

• B. on the top of the sheet.

• C. outside of the sheet.

• D. underneath the sheet.

A knot in a board is caused by:

• A. a branch.

• B. decay.

• C. improper drying.

• D. proper machining.

Which is the definition of wood veneer?

• A. a thin layer of plastic

• B. a thin layer of wood

• C. fiberglass and glue

• D. wood chips and glue

Exterior plywood must contain which type of adhesive?

• A. Elmer's glue

• B. high bond

• C. superglue

• D. waterproof

Needle-bearing trees are classified as:

• A. hardwoods.

• B. heartwood.

• C. sapwood.

• D. softwoods.