What do you work in? Not really.
What do you do in your work? Yes
What time do you start your work? What time do you finish? Both are fine
What do you like more of your job? I'd say 'most in your job'
What do you like less? I'd use least
Are you happy with your salary? Yes
Is friendly the atmosphere in your work? Is the atmosphere friendly in your job
Student or Learner