Your questions are difficult to answer, as there are no national standards for polygraph operators, nor are there national standards for post-conviction polygraph "testing." If your state requires polygraph operators to be licensed, then you could check what rules may be applicable. Such information is often available on-line. But it would probably be best to consult with a lawyer regarding your husband's rights where the polygraph is concerned.

That said, it is not unusual for a polygraph to have three relevant and three "control" questions. Typically, a few irrelevant questions, and perhaps an unscored "sacrifice relevant" and/or "symptomatic question" will also be included, for a total of  10-12 questions.