5-13. 5-14. 5-15. 5-16. 5-17. 5-18. Which type of lumber is primarily graded  by  its  allowable  stresses? 1. Factory 2. Structural 3. Shop 4. Yard To  find  the  board  foot  measurement of lumber,    what  formula  should  you use? When computing the amount of board feet in a dressed 2- by 4-inch board,    which of the following dimensions  should  you  use? 1. 1  3/4 by     3/4 in 2. 2 by 4 in 3. 1 5/8 by 3 5/8 in 4. 1 7/8 by 3 5/8 in When you are laminating lumber, how are  the  laminations  (pieces) fastened  together? 1. Nailed and glued together, with the  grain  of  all  pieces  running perpendicular 2. Nailed or glued together, with the grain of all pieces running parallel 3. Nailed, bolted, or glued together, with the grain of all pieces running perpendicular 4. Nailed,    bolted,  or  glued together, with the grain of all pieces  running  parallel Which of the following characteristics  applies  to  plywood? 1. Punctureproof 2. Resists   splitting 3. Pound for pound one of the strongest  materials  available 4. Both 2 and 3 above Plywood is used for which of the following  purposes? 1. Formwork 2. Sheathing 3. Furniture 4. Each of the above 5-19. What are the two most common sizes of plywood sheets available for use in  construction? 1. 3 by 6 ft and 4 by 8 ft 2. 4 by 8 ft and 4 by 10 ft 3. 4 by  8 ft and 4 by 12 ft 4. 4 by 10 ft and 4 by 12 ft 5-20. How  are  plywood  panel  grades generally   designated? 1. By the grade of veneer on the face only 2. By the kind of glue only 3. By the grade of veneer on the face and back only 4. By the kind of glue and the grade of veneer on the face and back IN  ANSWERING  QUESTION  5-21,  REFER  TO  FIGURE 6-6 IN YOUR TEXTBOOK. 5-21. What plywood veneer grade allows knotholes up to 2 1/2 inches in width  and  under  certain  conditions up to 3 inches? 1.   A 2.   B 3.   D 4.   N 5-22. When index numbers 48/24 appear on a grading  identification  stamp,  what does  the  number  24  represent? 1. Minimum on-center spacing of supports  for  subfloors 2. Maximum on-center spacing of supports  for  roof  decking 3. Maximum on-center spacing of supports  for  subfloors 4. Maximum on-center spacing of supports  for  wall  studs 5-23. Which of the following types of plywood panels is/are recommended for use in cabinets? 1. Standard plywood sheathing 2. Decorative panels only 3. Overlaid panels only 4. Decorative  panels  and  overlaid panels 5-24. Which of the following types of wood substitutes  provides  good  fire resistance? 1. Fiberboard 2. Gypsum  wallboard 3. Particleboard 4. Hardboard 32