In my opinion, no, that is not proper phrasing for a petition. If you wanted a raise at work, would you say to your boss, “Hey, boss, how did I get such a large raise?” No, you would not. He’d look at you like you’ve lost your mind.
When you evoke a spirit, you don’t phrase the task as a question because the spirit would then ask you why you bothered to call them if you already have it, so why would you do so in a petition?
The question method is only valid when you are affirming to yourself because it is directed at your own subconscious mind. It doesn’t apply when you’re speaking to another being.