1. Wood can be protected from the attack of decay fungi, harmful insects, or marine borers by applying chemical preservatives. True False 2. Wood preservatives that are applied at recommended retention levels and achieve satisfactory penetration can greatly increase the life of wood structures. True False 3. What does AWPA stand for? American Wood-Preservers’ Association American Wild Preservative Acid American Wood Power Association None of the above 4. The EPA regulates pesticides, and wood preservatives are one type of pesticide. Preservatives that are not restricted by EPA are available to the general consumer for non-pressure treatments, and the sale of others is restricted to certified pesticide applicators. True False 5. Restricted use preservatives refer to the chemical preservative and not to the treated wood product. The general consumer may buy and use wood products treated with restricted-use pesticide. True False 6. Consumer information sheets are available for three major groups of wood preservatives: Creosote pressure-treated wood Pentachlorophenol pressure-treated wood Inorganic arsenical pressure-treated wood True False 7. Wood preservatives can be divided into two general classes: Oil borne preservatives, such as creosote and petroleum solutions of pentachlorophenol and Waterborne preservatives that are applied as water solutions. True False 8.
The three expo- sure categories for preservatives are:
Ground contact (high decay hazard that needs a heavy-duty preservative), Aboveground contact (low decay hazard that does not usually require pressure treatment), and Marine exposure (high decay hazard that needs a heavy-duty preservative or possibly dual treatment). True False 9. Wood does not swell from treatment with preservative oils, but it may shrink if it loses moisture during the treating process. Creosote and solutions with heavy, less volatile petroleum oils often help protect wood from weathering, but may adversely influence its cleanliness, odor, color, paint ability, and fire performance. True False 10. The character of the tar used, the method of distillation, and the temperature range in which the creosote fraction is collected all influence the composition of the creosote. True False 11. Zinc naphthenate is different to copper naphthenate but is more effective in preventing decay from wood-destroying fungi and mildew. True False 12. Chlorothalonil (CTL) [tetrachloroisophthalonitrile] is an organic biocide that is used to a limited extent for mold control in CCA-treated wood (AWPA P8). True False 13. Tebuconazole (TEB) is an organic triazole biocide that is effective against wood decay fungi, but its efficacy against insects has not yet been evaluated. True False 14. Effective water-repellent preservatives will not retard the ingress of water when wood is exposed above ground. True False 15. Preservative systems containing water-repellent components are sold under various trade names, principally for the dip or equivalent treatment of window sash and other millwork. True False 16. What does NWWDA stand for? National Wood Window and Door Association National Wood Wild and Door Association National Wild Water and Door Association None of the above 17. Three types of chromated copper arsenate (CCA) Types A, B, C are covered in AWPA P5, but Type C is by far the most commonly used formulation. True False 18. Copper bis (dimethyldithiocarbamate) (CDDC) is a reaction product formed in wood as a result of the dual treatment of two separate treating solutions. True False 19. The effectiveness of preservative treatment is influenced by the penetration and distribution of the preservative in the wood. For maximum protection, it is desirable to select species for which good penetration is best assured. TRue False 20. Drying of wood before treatment is not necessary to prevent decay and stain and to obtain preservative penetration. True False