It helps if you read a lot of literature to more or less get an idea of the type of research questions you would craft. Reading will give you an idea of the type of literature there are in the field, plus it would give you the research gaps, or what has not been done yet. Thank you
Make sure to only phrase a limited amount of relevant research questions that you can answer based on the sources/data you have. Avoid research questions that are too general and too vague.
The kind of research questions you asked largely depends on the approach you intend to use for the study. For example, whether you plan to use qualitative or quantitative approach will determine how you frame your research questions.
The rule of the thumb is to:
1. Avoid too general questions
2. Focus on only what you intend to study
3. Make your questions as clear and concise as you possibly can
4. Think about what you intend to find out by the end of your research and ask questions about that.