Please send comments or suggestions to or use the form below. I welcome observations, questions, and suggestions for improvement. If you have a comment about a specific question, please provide as much detail as possible so I can find it.

Readers should be aware that, even though mistakes are occasionally discovered in the PDG, I will not change questions or answers if doing so conflicts with the PDG. My goal is to provide test preparation material that exactly matches the PDG and I cannot deviate from that. If a fact is incorrect, it will probably be identified by testers and thrown out. But that's up to the Air Force, not me. For clarification purposes, a note about the discrepancy will be added in the appropriate area.

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