To use Survey Mode, log in to MissionHub on the web and click Surveys in the menu bar. Here you will see Surveys, Keywords, and the list of available surveys in the dropdown. The list of surveys are those ready for survey mode.
Choose which survey you would like and the selected survey will immediately come up, ready for use. If the survey uses Facebook login, once a person finishes the survey and hits the 'submit' button, they are automatically logged out of Facebook and the survey resets on the device for another person to begin their survey.