1. What is implied datum and what are the shortcomings of the implied datum system?
2. What are datum feature, datum, and datum simulator?
3. What are datum targets, and when are they used? (next)

4. Using the above figure, sketch the simulated datums for checking the location tolerance of the 10.4-10.3 hole. (next)

5. For the feature control frame shown, draw the datum feature simulator for establishing the datum plane B, datum axis A, and datum center-plane C. (next)

6. Use the figure, draw and dimension the datum feature simulator for establishing the datum axis A. Will there be any datum shift? If so, how much?