1-To create a test in your blackboard, you should find the "Course Tools" panel and build a test in your "Test, Survey, Pools" section.
2- "Build a test", if you want to create the test within Blackboard. You can also import your test if you've done it offline.
3- For more information about creating a test, you can watch the video.
Just in case there's no "full screen" function for the video, here's the Link to Youtube