The specific questions are up to you.
At least two questions should identify the person completing the survey.
The second two will collect generic information about service
Use as many different answer types as possible.
Once you are done, open the survey template (using open anonymous) and try submitting.
Things to Think About
If notifications depend on certain fields – make them required.
The required field check is not made until the page is submitted. A handy visual cue such as bolding the label or an asterisk in the label (or both) will help your customers make fewer mistakes as they complete a survey.