Test Your Knowledge Answer the following questions using the information provided in this chapter. 1. When measuring to determine the length of a pipe required to connect two fittings, the only method that does not require making allowances for fittings is _____. A. center-to-center B. face-to-face C. shoulder-to-shoulder 2. True or False? The DWV piping system is installed before the water supply piping. 3. Horizontal runs of DWV piping must be installed with a fall of _____ per foot of run. A. 1″ B. ½″ C. ¼″ D. 1′ 4. The size of drain/waste pipe is determined by the _____. 5. The first step in the process of joining plastic pipe is to _____ the pipe and fitting. A. clean B. apply solvent cement to C. caulk D. apply joint tape to 6. When making solvent-cemented connections in plastic piping, what practice ensures even distribution of the solvent cement? A. Cleaning the inside of the fitting. B. Rotating the fitting ¼ turn as it is installed. C. Applying a thick coating of cement on the inside of the joint. D. Applying a thick coating of cement on the end of the pipe. 7. A cemented plastic pipe joint is correctly made if a(n)_____ of cement forms completely around the fitting. 8. If the face-to-face distance between a ½″ copper elbow and a ½″ copper tee is 6½″, the length of the connecting copper pipe will be _____. A. 6½″ B. 7″ C. 7¼″ D. 7½″ 9. If the face-to-face distance between a ¾″ galvanized iron tee and a ¾″ elbow is 18″, what length of ¾″ galvanized iron pipe will be required to properly connect the two fittings? A. 19″ B. 19⅛″ C. 19¼″ 10. The material applied to threaded pipe before assembly is called _____. A. pipe joint seal B. Teflon tape C. cement D. Both A and B. 11. The tool used to pack oakum into the bell of a cast-iron pipe is called a(n) _____. A. outside caulking iron B. yarning iron C. inside caulking iron D. packing tool 12. When making horizontal joints with hub and spigot cast-iron pipe, a _____ is used to prevent the molten lead from running out of the joint. A. riser clamp B. yarning iron C. joint runner D. clamp Suggested Activities 1. Working as a group, make a set of sample pipe assemblies with each of the different types of pipe commonly used in your area. Each of these completed exercises should be capped and fitted with adapters or test plugs so they can be tested using standard procedures. 2. Working in a small group, install the DWV piping for a kitchen, utility room, or bath- room in a model framed structure. The completed piping system should be tested using the testing procedure(s) employed in your community. 322 Section 3 Plumbing System Design and Installation Copyright Goodheart-Willcox Co., Inc.