3-31. 3-32. 3-33. 3-34. 3-35. 3-36. 3-37. What feature do all the lines in the  system  of  line  conventions  have in common? 1. They convey information 2. They are drawn with a pen guided by a straightedge 3. They are drawn with a compass 4. They are drawn freehand How should construction lines be drawn? 1. Thick  and  dark 2.  Dark  enough  to  see,  but  light enough to erase easily 3. Thin   and   dark 4. With  a  soft  pencil To indicate the travel of a moving center, which of the following lines  should  you  use? 1. Center  lines 2. Phantom  lines 3. Reference  lines 4. Visible  lines What line is an example of a center line? 1. 2. 3. 4. What line is a solid, thick line and defines the outlines of an object in a drawing? 1.  Datum 2. Dimension 3. Extension 4. Visible In a drawing of a certain view of an  object,    the features of the object that CANNOT be seen are indicated by what line? 1. 2. 3. 4. How 1. 2. should  arrowheads  be  drawn? Between 1/4 and 1/2 in long, the length twice the spread, and filled in Between 1/4 and 1/2 in long, the length twice the spread, and not filled in 3. Between 1/8 and 1/4 in long, the length three times the spread,    and filled in 4. Between 1/8 and 1/4 in long, the length three times the spread,    and not filled in 3-38. 3-39. 3-40. Drawing space is saved in certain large-scale  detailed  drawings  by omitting  unimportant  parts  that  are continuous  and  have  the  same  size and  shape. What lines are used to indicate  these  omitted  parts? 1. Section 2. Leader 3. Break 4. Cutting  plane The alternate positions of a switch handle can be indicated on a drawing by the use of what lines? 1. 2. 3. 4. If an internal section of an object is   needed,   which   of   the   following lines would indicate the plane from which  the  sectional  view  was  taken? 1. Cutting  plane 2. Sectional plane 3. Datum  plane 4. Reference  plane IN  ANSWERING  QUESTIONS  3-41  THROUGH  3-44, SELECT THE TYPE OF LINE FROM THE FOLLOWING LIST  THAT  BEST  MATCHES  THE  DESCRIPTION. 3-41. 3-42. 3-43. A line which indicates the plane from which an elevation is measured. 1.  A 2.  B 3.  C A line that connects corresponding points on different sheets of the same drawing. 1.  A 2.  B 3.  C The type of line that indicates sewing lines on an article. 1.  A 2.  B 3.  C 1 8