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