If a character named Mary decides to marry a man, we saw that you could ask two types of questions about that:
1. Factual question (e.g. Who did she marry?)
2. Interpretive question (e.g. Why did she marry him?)
Evaluative questions are the third step in interpretation: they are designed to elicit a personal reasoning by asking readers to evaluate (morally, socially, politically etc.) interpretations.
In this case, evaluative questions could be:
Do you think she should have married him? Why, and why not?
Considering what you know of the possible reasons she could have to marry him, would you make the same choice?
If she married for money (or for love, or for fear of loneliness, or out of pity), do you understand her reasoning? Would you do the same in the same situation? Why, why not?