Test 2 Chapter 13

A lumber grade stamp must include the mill identification number. True or False

True

From the user's view point, the difference between MC 15 and KO 15 is generally ignored. True or False

True

Hardwoods are generally used for fine-quality flooring, furniture, and wall paneling? True or False

True

Spruce is a softwood species True or False

True

The approximate density of lumber is a. 35 pcf. b. 35 psf. c. 55 pcf. d. 55 psf. e. 75 pcf.

a. 35 pcf.

which of the following lumber cross sections is that of a dimesion lumber a. 4X8 b. 6X8 c. 1X8 d. 1X12 e. 6X12

a. 4X8

Wood is a. Stronger along the grain than across the grain. b. Stronger across the grain than along the grain. c. Equally strong in both directions of the grain.

a. Stronger along the grain than across the grain.

A piece of lumber has been specified as 2 in. X 4 in. in cross section. This refers to its a. actual cross-sectional dimensions. b. nominal cross-sectional dimensions.

a. actual cross-sectional dimensions

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 a. dry. b. green. c. wet. d. moist. e. arid.

a. dry.

Structural lumber is typically a. flat-sawn. b. quarter-sawn. c. either (a) or (b), depending on the type of structural member

a. flat-sawn.

Lumber used for structural framing of buildings in North America is generally derived a. from softwood species b. from hardwood species c. from both softwoods and hardwoods, depending on the price of lumber d. from both softwoods and hardwoods, depending on the time of the year

a. from softwood species

Lumber used for structural framing members, such as studs, floor joists, and rafters, is graded using a. only visual inspection b. only machine grading c. both visual and machine grading must be used to arrive at lumber's grade

a. only visual inspection

in a 2X6 stud the wood grain is parralell to the a. vetical dimension b. 2-in dimension c. 6-in dimension

a. vetical dimension

Which of the following terms means the same as quarter-sawn? a. Tangentially sawn b. Radially sawn

b. Radially sawn

a termite shield is generally made of a. asphalt-treated felt b. galvanized sheet steel c. lead sheet d. kraft paper

b. galvanized sheet steel

Fungal decay in wood occurs when the moisture content in wood is a. greater than or equal to 15% b. greater than or equal to 20% c. greater than or equal to 25% d. between 15% and 25% e. none of the above

b. 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 a. annual rings b. growth rings c. concentric rings d. eccentric rings e. all of the above

b. growth rings

in the united states, most strucutral lumber is frown in the a. northern region of the US b. western and Southern region of the us c. eastern and northeastern region of the us d. central region of the us e. none of the above, becuase most strucutral lumber is imported from mexico

b. western and southern region 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 in the wood? a. 7% b. 9% c. 11% d. 15% e. none of the above

c. 11%

A retail er of building materials purchased 1,000 pieces of 2 x 12 lumber, each 10 ft long. How many board feet did the retailer purchase? a. 1,000 bd ft b. 10 MBF c. 20,000 bd ft d. 100,000 bd ft e. None of the above

c. 20,000 bd ft

Which of the following two terms are used synonymously? a. Lumber and wood b. Lumber and laminated veneer lumber c. Lumber and solid sawn lumber d. All of the above

c. Lumber and solid sawn lumber

preservative-treated lumber is effective a. only against termite attack b. only against fungal attack c. against both fungi and termites

c. against both fungi and termites

The walls of wood cells consist primarily of a. calcium b. glucose c. cellulose d. copper e. llignin

c. cellulose

The basis for distinguishing lumber as board, dimension lumber, and timber is the a. species of the lumber b. strength of the lumber c. cross-sectional dimensions of the lumber d. length of the lumber e. durability of the lumber

c. cross-sectional dimensions of the lumber

The term S2S implies that the lumber has been a. sawed twice. b. sawed from two sides. c. surfaced on two sides. d. none of the above.

c. surfaced on two sides.

The actual dimensions of 4 x 8 lumber are a. 3 1/2 X 7 1/2 b. 3 1/4 X 7 1/2 c. 3 1/4 X 7 1/4 d. 3 1/2 X 7 1/4 e. none of the above

d. 3 1/2 X 7 1/4

Which of the following species of wood is not a softwood? a. Pine b. Fir c. Cedar d. Oak e. Redwood

d. Oak

A 10-ft-long stud was installed in position when th e w ood's moisture content was 19%. During a long dry spell, the wood's moisture content became 8 %. The new stud length will be a. approximately 9 ft 10 in. b. approximately 9 ft 10½ in. c. approximately 9 ft 11 in. d. approximately the same as the initial stud length of 10 ft. e. none of the above.

d. approximately the same as the initial stud length of 10 ft.

the difference between softwoods and hardwoods is based on the a. strength of wood b. density of wood c. abrasion resistance of wood d. botnaical characterisitcs e. decay resitance of wood

d. botnaical characterisitcs

which of the following species of wood is naturally decay resitant a. pine b. fir c. spruce d. cedar e. hemlock

d. cedar

which of the followiung grades will not apply to a 2X8 lumber a. no 1 b. no 2 c. no 3 d. construction

d. construction

The cellular stru.cture of wood consists mainly of a. hollow, small, approximately spherical cells. b. solid, small, approximately spherical cells. c. hollow, small, approximately ellipsoidal cells. d. hollow, long tubular cells. e. either (c) or (d).

d. hollow, long tubular cells.

Wood certified by the Forest Stewardship Council (FSC) is available a. only in the US b. in the us and canada c. in the us, canada, and mexico d. in the (C) and several other countries

d. in the (C) and several other countries

which of the following is not a lumber grade a. no 1 b. no 2 c. no 3 d. no 4 e. Construction

d. no 4

which of the following grades can only be used as blocking a. no 1 b. no 2 c. construction d. utility e. standard

d. utility

Which of the fo ll owing species of wood is not a hardwood? a. Teak b. Balsa wood c. Rosewood d. Oak e. Redwood

e. Redwood

Redwood is grown mainly in a. texas b. florida c. oklahoma d. arizona e. california

e. california

The actual dimensions of 2 x 12 lumber are a. 1 1/2 X 11 b. 1 1/2 X 11 1/2 c. 1 1/2 X 11 3/4 d. 1 3/4 X 11 3/4 e. none of the above

e. none of the above

The term S-DRY implies that the lumber has been a. stored in a dry climate. b. sawed when its moisture content was <25% c . surfaced when its moisture content was <25% d. sawed when its moisture content was >19% e. surfaced when its moisture content was <19%

e. surfaced when its moisture content was <19%

The terms sapwood and heartwood refer to a. two different wood species b. two different subspecies of wood c. two different types of wood cells d. two different parts of a growth ring e. two different parts of the same tree

e. two different parts of the same tree

A lumber grade stamp must include information on the cross-sectional dimensions of lumber. True or False

False

Flat-sawn lumber is dimensionally more stable than quarter-sawn lumber. True or False

False

In calculating the board foot measure, we must use the actual dimensions of lumber, not its nominal dimensions. True or False

False