Summary This chapter has described the most common hand tools used by technicians, as well as their selection and safe use. It is almost impossible to perform even the simplest repair without using some type of tool. The right tool, used properly, will give satisfactory results. The wrong tool, or an improperly used tool, will give unsatisfactory results and may cause injury. Selecting the proper hand tool for the job depends on understanding the advantages and disadvantages of each tool. A good technician knows when, where, and why a specific tool will work better than another. For example, several different tools (pliers, socket wrench, adjustable wrench, box-end wrench) can be used to loosen a nut or bolt, but only one will do the job best and most safely. Take time to select or obtain the right tool. Other tools are introduced and explained in later chapters, as needed. Test Your Knowledge Please do not write in this text. Write your answers on a separate sheet of paper. 1. Misuse of tools indicates poor _____ skills. 2. Name six types of wrenches. 3. The types of wrenches that tend to slip are _____ and _____. 4. What is the safest type of wrench to use on a stubborn nut or bolt? Why? 5. The most commonly used socket heads have _____ points. 6. True or false? You should always pull on a wrench, rather than push. 7. Tools with plastic-dipped handles specifi- cally do not protect against which type of hazard? 8. List six types of pliers. 9. Safety goggles are absolutely necessary when using pliers to cut _____ or _____. 10. Name at least three different types of screw- head patterns. 11. Which hammer should be used for striking chisels? 12. Do hacksaws cut on the forward stroke or the backward stroke? 13. True or false? Twist drills can be used only on wood. 14. Which one of these basic types of snips has a serrated blade? A. Straight-pattern. B. Combination. C. Duckbill. D. Aviation. 15. Since they are hit with a hammer, punches and cold chisels are called _____ tools. 34 Heating and Cooling Essentials Copyright Goodheart-Willcox Co., Inc.