Practical questions are questions that you, as a professional(-to-be), deal with in practice. There are different types of questions. A question can, for example, concern:
Sometimes a question is not important enough to conduct an entire research for. Sometimes research is not necessary, and do you know the answer from your own knowledge and experience or is it just a matter of questioning. Sometimes you can go further without examining it.
But sometimes:
Then you can look for the research question in your practical question. Knowledge and why questions are often already researchable, but you can also turn other practical questions into research questions by asking yourself the following question:
What kind of information do I need to be able to answer this practical question?
Example
Suppose you want to develop a chat app such as WhatsApp, but one that is safe to use in traffic. A practical question could then be: What demands should my solution meet?
What kind of concrete information questions can you think of?
(Tip: first try to come up with some examples yourself!)
There are, of course, many more questions to consider that could help you come up with a secure chat app to be used in traffic. You will therefore probably have to limit your research to those questions that are most important to your solution. You can also quickly come to a good enough answer for some questions, for example by Googling or briefly talking to an expert.
Sources
Harinck, F. (2010). Basisprincipes praktijkonderzoek. Sixth edition. Garant. Consulted on 14-09-2018 from Google Books.