2-41. You should NEVER touch the measuring   surfaces   of   gage   blocks any  more  than  necessary. The moisture   from   your   hands   contains an   acid   that   can   cause   which   of the   following   problems? 1.  The  gage  blocks  to  warp 2.   The   gage   blocks   to   stain 3.   The   gage   blocks   to   attract   an electrical    charge 4.  The  gage  blocks  to  become b r i t t l e 2-42. After   cleaning   gage   blocks,   you should   always   take   which   of   the following   actions? 1.   Coat   the   gage   blocks   with   heavy grease 2.   Boil   the   gage   blocks   in gasoline 3.   Cover   the   gage   blocks   with  a film   of   acid-free   oil 4.   Paint   the   gage   blocks   with lead-free    paint 2-43. Thickness   gages   are   often   referred to   by   which   of   the   following terms? 1.   Width   gages 2.   Height   gages 3.   Length   gages 4.   Feeler   gages 2-44. Center   gages   are   graduated   in which   of   the   following   increments? 1.   14ths,   20ths,   24ths,   and   32nds of   an   inch 2.   15ths,   22nds.   26ths,   and   34ths of   an   inch 3.   17ths,   28ths,   30ths,   and   36ths of   an   inch 4.   19ths,   25ths,   29ths,   and   37ths of   an   inch 2-45. You  can  use  a  screw  pitch  gage  to check   the   pitch   of   which   of   the following   types   of   threads? 1.   U.   S.   Standard   and   Metric 2.   National   Form   and   V-form 3.  Whitworth  cut 4.   All   of   the   above 2-46. The   pitch   of   a   screw   thread   is   the distance   between   the   center   of   one tooth   to   the 1.   end   of   the   screw 2.   center   of   the   next   tooth 3.   center   of   the   screw   head 4.   head   of   the   screw 2-47. Telescoping   gages   are   used   for which   of   the   following   purposes? telescopes 1.   To   gage   larger   holes 2.   To   measure   inside   distances 3.   Both   1   and   2   above 4.  To  measure  the  lenses  on 2-48. Telescoping   gages   normally   have what maximum measuring capacity? 1. 3   inches 2.    6   inches 3.   8   inches 4.    9   inches 2-49. On   a   thread   cutting   tool   gage, what  do  the  numbers  represent? 1.   The   number   of   threads   per   inch 2.   The   number   of   threads   per   foot 3.   The   number   of   threads   on   a screw   or   bolt 4.   The   length   of   a   screw   or   bolt 2-50. Each   blade   of   a   fillet   and   radius gage   is   normally   marked   in   which of   the   following   increments? 1.   10ths 2.  32nds 3.  42nds 4.   64ths 2-51. Which   of   the   following   tools   is used   to   check   the   accuracy   of drill   cutting   edges   after grinding? 1.  A  marking  gage 2.   A   thickness   gage 3.   A   drill   point   gage 4.  A  rule  depth  gage 11