You can make multiple copies of assessments in the same course site. For example, you might want to create a new copy of an existing assessment in order to use it as the basis for a new, modified assessment.
Go to Tests & Quizzes.
Select the Tests & Quizzes tool from the Tool Menu of your site.
From the Actions menu, select Duplicate.
From the Tests & Quizzes tool home screen, choose the Duplicate option in the drop-down menu for the draft assessment you would like to duplicate.
Note: You cannot duplicate published copies of assessments in Tests & Quizzes.
Confirm duplication.
On the Duplicate Assessment Confirmation screen, select Duplicate.
Edit the duplicated assessment's questions or settings.
You can edit the Settings of the duplicated assessment, such as its title and availability, by following the steps outlined in How do I view and modify the settings of an assessment?
You may also modify the questions in the duplicated assessment by following the steps outlined in How do I create an assessment in Tests & Quizzes?