"How do you cook a tangerine?"
Translation:귤을 어떻게 요리합니까?
This is only based off my own observations, but I think it depends on what type of question it is and what type of word you are looking for. In this case, you are looking for an adverb, or how (어떻게) you are cooking something. I suppose if you cook tangerines quickly the sentence would be 귤을 빨리 요리해요. 빨리 is the "answer" to 어떻게 therefore it takes that spot. Would love for someone else to explain this a bit more.