I'd put the most important points first. I would also set out the letter so that the questions were not lost within the body of the letter. Eg:
I would particularly like to ask about the following:
- What is the rate of pay?
- What qualifications do I need?
- Do I need to wear a funny hat?
- Do you have an environmental sustainability policy?
I look forward to your reply, and your answers to my four questions.
(Dot points aren't necessary; you could put each question in a new paragraph with a line space between them - but set them off in some way)




