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 is Viewing
Properties of Printed Boards.

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          121  When describing a bare board which datum planes
          relate to X and Y coordinate information? 
          
          A.   the drilling datum
          B.   the tertiary datum
          C.   the primary datum
          D.   the zero-zero datum
          E.   the secondary datum
          F.   the component datum      
     
                     select the two most correct answers

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Previous QOD

          120  Which two factors are the primary influence for the
          layer assignment of a printed board 
          
          C.   the direction of conductor routing
          E.   the balanced distribution of copper     
          
Resource: IPC-T-50 Specific Terms; IPC-D-275 para 3.3.6;
3.7.4;5.2.5.1; 5.3.1.6 

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Please send comments, constructive critique, or suggestions to
Lisa Williams at [log in to unmask] 

Dieter Bergman