You can export a quiz or survey from a Canvas site and then import it into another Canvas site or the same site by following these steps:
Important: If there is a quiz/survey with the same name in the site that will receive the export (a.k.a. the quiz/survey-import site), you will want to change that name of that quiz/survey before following the steps below. If you do not and students have submitted results for the quiz/survey of the same name in the import site, that quiz/survey and those results will be overwritten.
In the “Choose Export Type” section of these instructions, you will deselect the “All Quizzes” option and then click in the check-box for the quiz/survey you want to export.