There are no fixed, black-and-white rules that determine that one question is good and another is lousy. For example: “Why?” can be a wonderful question. It can be an unexpectedly insightful question that penetrates to the core of the issue. But “Why?” can also be a terrible question. It can come across as cynical, critical, and reproachful—especially when asked of a subordinate or a child.
Nonetheless, power questions have certain characteristics. They may embody one or more of the following characteristics.
Power questions are questions that:
Generally, open-ended questions are more fruitfull then closed-ended questions. But SOMETIMES you need a closed-ended questions. As in, "Is it a Yes or a No?"!
Finally, good questions are authentic and sincere. They don’t manipulate. They are not cynical or sarcastic.