Step 1 – go into the course that has the test.
Step 2 – Click Course Tools and the click “Test, Surveys, and Pools”.
Step 3 – Click "Tests".
Step 4 – Click the down arrow to the right of the test and select “Export”.
Step 5 – Save the export test zip file on your local machine. (i.e. Downloads)
Step 6 – Now go into your other course.
Step 7 – Click Course Tools and the click “Test, Surveys, and Pools”.
Step 8 – Click "Tests".
Step 9 – Click "Import Test".
Step 10 – Click “Browse My Computer”
Step 11 – Select the exported test zip file and then click "Open".
Step 12 – Click "Submit".
Step 13 – Click "Ok".
Step 15 – Your test should now be in your course and you are now ready to deploy the test within one of your existing Content Areas or Content Folders.
For more information on deploying a test to a Content Area or Content Folder, please refer to the below link.
https://help.blackboard.com/Learn/Instructor/Tests_Pools_Surveys/Create_Tests_and_Surveys#add-a-test-or-survey-to-a-content-area_OTP-4