One of the sentences you definitively don't want to hear as a CEO is "This is complex". It a) smells suspiciously like "I'd rather have a coffe" or b) "We'll have to spend a lot of time and money". However, you, as an experienced CEO, can solve this with a simple answer: "Break it down." Let's see how.
Asking questions in the office is a welcomed practice because it clearly shows the engagement of employees and at the end of the day without successful communication there is no successful company. In the other hand, too much questions means it's time for panic.