The following question is one that was provided by designers for
the "A" basic level exam.  It is NOT included in the final
published test and is for reference only.  The topic was Grid
Systems.

101.  Why are grid systems used for locating components, PTH's
conductor patterns and other features on printed boards and printed
board assemblies?

     A.   Because CAD systems require it.
     B.   Because design standards require it.
     C.   Because it helps in the manufacturing operations.
     D.   Because it avoids having to dimension individual
          locations.

     Select the most correct answer

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Dieter Bergman