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FPU 131: Wood Structure and Identification



                                      Take-Home Exercises 11. Defect in wood

               Instruction: Define and distinguish the term between each other, and briefly explain its relation
               and importance in wood identification.

                   1.  What is wood defect?

                          _______________________________________________________________


                          _______________________________________________________________

                   2.  What are the growth related defect?


                       a.  Cross grain _____________________

                       b.  Knots __________________________


                              b.1. According to manner of enclosure ____________________________

                              ___________________________________________________________


                              b.2. According to manner of cut _________________________________

                              ___________________________________________________________

                              b.3. According to quality _______________________________________


                              ___________________________________________________________

                   3.  What are the reaction wood


                              a.  Two types _________________________

                                                 _________________________


                   4.  Defect caused by growth stresses

                          a.  __________________________


                          b.  __________________________

                   5.  Pitch defects


                       a.  _____________________________

                       b.  _____________________________



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