Date Class Name Answer the following questions using the 13. True or False? Detailed representation information provided in this unit. the most realistic of the three methods representation, but is usually only used Know and Understand the major diameter of the screw thread or larger on the drawing. 1. True or False? The geometric shape that is the basis for screw threads is the spiral. 14. If a UNC thread for a 1/4" body diamer 2. True or False? Threads have one purpose, 20 threads per inch, then UNF threads that body diameter would be which is holding parts together. per inch. A. 12 -thread Match the following screw thread terms to their B. 16 definitions. Answers are used only once. 3. The bottom between ridges A. Lead C. 20bonignarly or D. 28 B. Root 4. Distance of advance when a C. Crest threaded feature turns 360 15. True or False? Inch-based screw threads D. Flank are classified by their precision, or 5. The side of a ridge manufacturing tolerance, with 2 being mos 6. The top edge or surface of a common, 1 being less precise, and 3 being ridge more precise. 16. True or False? A two-start thread is when latch the following screw thread terms to their there are two ridges that form the screw finitions. Answers are used only once. thread, resulting in a lead equal to half the 7. Measured root-to-root A. Major pitch. 8. Measured crest-to- diameter 17. Which of the following terms describes crest B. Pitch threads that advance with counterclockwise 9. Measured flank-to- C. Minor motion instead of the normal clockwise flank diameter motion? D. Thread angle A. Lead 10. Measured thread- B. Series to-thread (any same point) C. Left hand D. Backward 11. Which of the following thread forms are the Match the following parts of the thread most similar in appearance? specification 5/8-18 UNEF - 2A to the description. A. Metric and Unified Answers are used only once. B. Square and Stub Acme 18. Thread form C. Knuckle and buttress A. 5/8 D. Unified and Acme 19. Thread series B. 18 C. UN On industrial prints, which of the following 20. Number of threads per inch is not a way that screw threads usually 21. External thread D. EF appear? 22. Major diameter E. 2 A. Detailed 23. Class of fit F. A B. Schematic C. Simplified D. True projection