A. Pitch  diameter B. Outside  diameter C. Number  of  teeth D. Addendum  circle E. Circular  pitch F. Addendum G. Dedendum H. Chordal  pitch I. Diametral  pitch J. Root  diameter K. Clearance L. Whole  depth M. Face N. Thickness O. Pitch  circle P. Working depth Q. Rack  teeth Figure  2A IN  ANSWERING  QUESTIONS  2-25  THROUGH 2-41 SELECT FROM THE GEAR NOMENCLATURE IN FIGURE 2A THE TERM THAT IS DESCRIBED IN THE QUESTION. 2-25. 2-26. 2-27. 2-28. The diameter of the pitch circle (or line) that equals the number of teeth on the gear divided by the diametral  pitch. 1. A 2. B 3. C 4. D The distance from center to center of teeth measured along a straight line or chord of the pitch circle. 1. F 2. G 3. H 4. I The height of the tooth above the pitch  circle  or  the  radial  distance between the pitch circle and the top of the tooth. 1. B 2. C 3. D 4. F The circle over the tops of the teeth. 1. B 2. C 3. D 4. E 2-29. 2-30. 2-31. 2-32. 2-33. 2-34. 2-35 The number of teeth to each inch of the pitch diameter or the number of teeth on the gear divided by the pitch diameter. 1. I 2. J 3. K 4. L The distance from top of the tooth to  the  bottom,  including  the clearance. 1. J 2. K 3. L 4. M A gear that may be compared to a spur gear that has been straightened  out. 1. M 2. O 3. P 4. Q The working surface of the tooth over the pitch line. 1. L 2. M 3. N 4. O The greatest depth to which a tooth of one gear extends into the tooth space of another gear. 1. N 2. O 3. P 4. Q The diameter of the circle at the root of the teeth. 1. I 2. J 3. K 4. L The  distance  between  the  bottom  of a tooth and the top of a mating tooth. 1. H 2. I 3. J 4. K 2-36. The width of the tooth, taken as a chord of the pitch circle. 1. N 2. O 3. P 4. Q 10