You cannot edit the survey questions, but you can choose which sets of questions are asked.
Community Leads and Class Leads can control which learning conditions are measured in the survey and can turn off (or on) the set of questions associated with specific learning conditions. Follow the steps to learn how to select a subset of learning conditions:
Click Survey in the community you would like to work with
Select the class(es) you would like to edit
Click the Edit Survey Questions
Select the changes you are looking to make
Click Save Changes