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
