Chapter 13 Multiple choice Flashcards
What two lumber terms are used synonymously?
Lumber and solid sawn lumber
The approximate density of lumber is?
35 pcf
The cellular structure of wood consists mainly of what?
Hollow, long tubular cells
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 what?
Growth rings
The walls of wood sells consist primarily of ?
Cellulose
The term sapwood and heart wood refer to :
a. two different wood species
b. two different types of wood cells
c. two different parts of the same tree
C. Two different parts of the same tree
The difference between softwoods and hardwoods is based on what?
botanical characteristics
Which of the following species of wood is not a softwood? a. Pine b. Fir C. Cedar D. Oak E. Red Wood
D. Oak wood is not a softwood
Which of the following species of wood is not a hardwood?
a. Teak
b. Balsa Wood
c. Rosewood
d. Oak
e. Redwood
E. Rosewood is not a hard wood
Spruce is a softwood species. True or faslse?
True
Lumber for structural framing of buildings in North America is generally derived from what?
From softwood species
Hardwoods are generally used for fine-quality flooring, furniture, and wall paneling. True or False?
True
In the U.S., most structural lumber is grown in what region?
Western and Southern regions of the united states
Redwood is mainly grown in which state?
California
Which of the following species of wood is naturally decay resistant?
Cedar
In a 2x6 stud, the wood grain is parallel to what direction?
The vertical direction
Wood is stronger along the grain rather than across. True or false?
True. Wood is stronger along the grain than across the grain.
What type of lumber is usually flat-sawn?
Structural Lumber
Flat-sawn lumber is dimensionally more stable than quarter-sawn lumber. True or false?
False
Which of the following terms means the same as quarter-sawn?
a. tangentially sawn
b. Radially sawn
B. Radially sawn
Fungal decay on wood occurs when the moisture content in wood is between?
Between 15% and 25%
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 what?
Dry
From the user’s view point, the difference between MC15 and KD15 is generally ignored. True or false?
True
The terms S-Dry implies that the lumber has been
surfaced when its moisture content was less than or equal to 19%
The term S2S implies that the wood has been
surfaced on two sides
Apiece of lumber has been specified as 2in x 4in in cross section. This refers to its
a. Actual cross-sectional dimensions
b. Nominal cross-sectional dimensions
A. actual cross sectional dimensions
In calculating the board foot measure, we must use the actual dimensions of lumber, not its nominal dimensions. True or false?
False
Which of the following lumber cross sections is that of a dimension lumber?
a. 4x8
b. 1x8
c. 6x12
d. 1x12
A. 4X8 Cross section Dimension lumber are 2 by’s or 4 by’s
Which of the following is not a grade of lumber?
a. No1
b. No2
c. No3
d. No4
e. Construction
D. No4
Which of the following grades can only be used as blocking?
a. No1
b. No2
c. Construction
d. Utility
e. Standard
D. Utility
Lumber used for structural framing members, such as studs, floor joists, and rafters, is graded using what?
Only visual inspection
What type of lumber is effective against both fungi and termites?
Preservative-treated lumber
A termite shield is generally made out of what?
galvanized sheet steel
