Mehta Monday Edition Numero Quatro (ch. 13,14.1-14.8)

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

a. 35 pcf.

33. Which of the following lumber cross sections is that of a dimension lumber? a. 4 * 8 b. 6 * 8 c. 1 * 8 d. 1 * 12 e. 6 * 12

a. 4 * 8

10. Spruce is a softwood species. a. True b. False

a. True

12. Hardwoods are generally used for fine-quality flooring, furniture, and wall paneling. a. True b. False

a. True

14. The most commonly used plywood panel (nominal) size is 4 ft * 8 ft . a. True b. False

a. True

17. An OSB panel generally has greater shear strength than a plywood panel of the same size and thickness. a. True b. False

a. True

24. From the user's view point, the difference between MC 15 and KD 15 is generally ignored. a. True b. False

a. True

37. A lumber grade stamp must include the mill identification number. a. True b. False

a. True

4. Unbalanced beams can be used only as single-span beams. a. True b. False

a. True

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

a. actual cross-sectional dimensions.

23. 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.

18. 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

11. 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.

40. 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.

17. 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 gran than across the grain

16. In a 2 * 6 stud, the wood grain is parallel to the a. vertical direction. b. 2-in. dimension. c. 6-in. dimension.

a. vertical direction.

2. Unprotected glulam members with a large cross section are considered to provide a fire resistance rating of up to a. 12 h. b. 1 h. c. 2 h. d. 3 h. e. 4 h.

b. 1 h.

11. Wood trusses are generally spaced at a. 12 in. on center. b. 24 in. on center. c. 48 in. on center. d. 60 in. on center.

b. 24 in. on center.

10. Nail plates, used to join members of a truss, are generally used only on one face of the truss. a. True b. False

b. False

19. Exterior siding panels may be made of OSB or plywood. a. True b. False

b. False

19. Flat-sawn lumber is dimensionally more stable than quarter-sawn lumber. a. True b. False

b. False

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

b. False

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

b. False

7. Wood I-joists are made of LVL or solid sawn lumber flanges and webs. a. True b. False

b. False

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

b. Radial-sawn

42. 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.

22. 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.

3. A glulam member a. must be made using long, continuous lengths of high-grade sawn lumber. b. is generally stronger and stiffer than sawn lumber of the same dimensions. c. requires complete protection from exterior elements due to its water-soluble adhesive. d. none of the above. e. all of the above.

b. is generally stronger and stiffer than sawn lumber of the same dimensions.

1. The most common use of glulam members is in a. structural panels. b. long-span beams. c. short-span beams. d. none of the above.

b. long-span beams.

15. Plywood panels should be placed with their longer dimension a. parallel to rafters or joists. b. perpendicular to rafters or joists. c. diagonal to rafters or joists. d. either (a) or (b). e. either (a) or (c).

b. perpendicular to rafters or joists.

13. In the United States, most structural lumber is grown in the a. northern region of the United States. b. western and southern regions of the United States. c. eastern and northeastern regions of the United States. d. central region of the United States. e. none of the above, because most structural lumber is imported from Mexico.

b. western and southern regions of the United States.

12. Plywood panels are made by gluing under heat and pressure layers of a. wood veneers so that the wood grain in all layers is in the same direction. b. wood veneers so that the wood grains in adjacent layers are perpendicular to each other. c. shredded wood strands so that the strands in all layers are in the same direction. d. shredded wood strands so that the strands in adjacent layers are perpendicular to each other.

b. wood veneers so that the wood grains in adjacent layers are perpendicular to each other.

21. 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%

32. A retailer of building materials purchased 1,000 pieces of 2 * 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

16. With respect to veneer quality, softwood plywood is graded in grades a. A to C. b. B to D. c. A to D. d. A to E. e. B to F.

c. A to D.

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 saw lumber

41. 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.

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

c. cellulose.

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

c. cross-sectional dimensions of lumber.

8. Compared to sawn lumber joists, wood I-joists are a. less expensive. b. slightly heavier. c. dimensionally more stable. d. all of the above.

c. dimensionally more stable.

26. 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.

5. Balanced glulam beams are mandated for a. continuous beams. b. single-span beams. c. beams with an overhang. d. (a) and (c). e. (b) and (c).

d. (a) and (c)

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

d. 3 1/2 in. *7 1/4 in.

15. Which of the following species of wood is naturally decay resistant? a. Pine b. Fir c. Spruce d. Cedar e. Hemlock

d. Cedar

38. Which of the following grades will not apply to a 2 * 8 lumber? a. No. 1 b. No. 2 c. No. 3 d. Construction

d. Construction

34. 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

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

d. Oak

39. 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

13. Cross-graining makes a plywood panel a. dimensionally more stable. b. less likely to split than solid sawn lumber. c. stronger in the direction of face veneer grains. d. all of the above. e. (a) and (c).

d. all of the above.

27. A 10-ft-long stud was installed in position when the wood'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 10 1/2 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.

7. The difference between softwoods and hardwoods is based on the a. strength of wood. b. density of wood. c. abrasion resistance of wood. d. botanical characteristics. e. decay resistance of wood

d. botanical characteristics.

The cellular structure 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.

43. Wood certified by the Forest Stewardship Council (FSC) is available a. only in the United States. b. in the United States and Canada. c. in the United States, Canada, and Mexico. d. in (c) and several other countries.

d. in (c) and several other countries.

9. Characteristics of a truss include a. greater spanning capability than a sawn lumber beam having the same amount of material. b. individual members joined together to form an array of interconnected rectangular frames. c. individual members joined together to form an array of interconnected triangular frames. d. (a) and (b). e. (a) and (c).

e. (a) and (c)

14. Redwood is grown mainly in a. Texas. b. Florida. c. Oklahoma. d. Arizona. e. California.

e. California.

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

e. Redwood

18. Grade stamps on engineered wood panels specify a. intended use and exposure. b. allowable spans. c. mill number. d. thickness. e. all of the above.

e. all of the above.

6. Laminated veneer lumber (LVL) is a. produced by gluing together wood veneers that are approximately 18 in. thick. b. generally used as floor joists. c. glued with all veneers running in the same direction. d. stronger along the grain and weaker across the grain. e. all of the above.

e. all of the above.

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

e. none of the above.

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

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

6. 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.