Exam 2 Chapter 13

A piece of lumber has been specified as 2x4 in in cross section. This refers to its

actual cross sectional dimensions

Preservative-treated lumber is effective

against both fungi and termites

a 10 ft long stud was installed in position when the woods moisture content was 19%. During a long dry spell the woods moisture content became 8%. The new stud length will be

approx. the same as the initial stud length of 10 ft

the difference between softwoods and hardwoods is based on the

botanical characteristics

Which of the following species of wood is naturally decay resistant

cedar

the walls of wood cells consist primarily of

cellulose

Which of the following grades will not apply to a 2 x 8 lumber

construction

The basis for distinguishing lumber as board, dimension lumber and timber is

cross sectional dimensions of lumber

The moisture content in a piece of lumber has been measured to be 15 %. According to the wood industry this piece of lumber will be classified as

dry

A lumber grade stamp must include information on the cross sectional dimensions of lumber

false

Flat sawn lumber is dimensionally more stable than quarter sawn lumber

false

In calculating the board foot measure we must use the actual dimensions of lumber not its nominal dimensions

false

Structural lumber is typically

flat sawn

Lumber used for structural framing of buildings in north america is generally derived

from softwood species

A termite shield is generally made of

galvanized sheet steel

Fungal Decay in wood occurs when the moisture content in wood is

greater than or equal to 20%

if we cut a cross section through a tree trunk we will see a number of rings. The most appropriate term for these rings is

growth rings

the cellular structure of wood consists mainly of

hollow long tubular cells

Wood certified by the Forest Stewardship council (FSC) is available

in the US Canada Mexico and several other countries

Which of the following two terms are used synonymously

lumber and solid sawn lumber

the actual dimension of a 2 x 12 lumber are

none of the above.

Which of the following species of wood is not a softwood

oak

Lumber used for structural framing members such as studs, floor joists, and rafters, is graded using

only visual inspection

Which of the following terms means the same as quarter sawn

radial sawn

Which of the following species of wood is not a hardwood

redwood

Wood is

stronger along the grain than across the grain

the term S2S implies that the lumber has been

surfaced on two sides

the term s-dry implies that the lumber has been

surfaced when its moisture content was less than or equal to 19%

A lumber grade stamp must include the mill identification number

true

From the users view point the difference between MC 15 and KD 15 is generally ignored

true

Spruce is a softwood species

true

hardwoods are generally used for fine quality flooring furniture and wall paneling

true

the term sapwood and heartwood refer to

two different parts of the same tree

which of the following grades can only be used as blocking

utility

in a 2 x 6 stud the wood grain is parallel to the

vertical direction

In the united states most structural lumber is grown in the

western and southern regions of the US

The weight of a piece of lumber is 2 lb. the weight of the same piece after it is fully dried is 1.8 lb. what was the original moisture content

11%

a retailer of building materials purchased 1000 pieces of 2 x 12 lumber, each 10 ft long. how many board feet did the retailer purchase

20,000 bd ft

the actual dimensions of a 4 x 8 lumber are

3 1/2 x 7 1/4

The approximate density of lumber is

35 pcf

Which of the following lumber cross sections is that of a dimension lumber

4 x 8

redwood is grown mainly in

California

Which of the following is not a lumber grade

No. 4