It is our experience that very large or complex surveys are extremely difficult to edit, administer and analyse, and can cause high respondent drop-out rates.
We do not currently limit how many questions you include in your survey; however if your survey is large and/or complex we will display a warning message on your Survey launchpad prior to launch. If you see this message we advise you to redesign your survey, or split it into several smaller surveys (which you can chain together using piping).
In future we may prevent extremely large surveys from being launched.