Well if I say frankly I am bit confused with your question so here I am telling you the all available ways to duplicate a quiz inside Wp Pro Quiz.
1. If you want to duplicate entire quiz means with questions then first export that quiz and then import the downloaded file. It will duplicate the same quiz with new shortcode. Now you can edit the Quiz name and other details.
2. If you just want to use the same Quiz Description again and again then you can make/save the template from bottom of the edit quiz option. This will help you if you are using same criteria like – timing, result variables,
3. If you want to use the same questions inside a quiz to the another quiz then you can use the copy questions after adding a new quiz.
I hope these ways may help you.