Hi AMR.
I took the test about 2 years ago without the formal Sbb program just like you. It is difficult because it's not just blood bank questions, but it definitely could be done.
If you have a hematology textbook, study the chapter on coagulation. On my test I had several coagulation questions and test cases. they give you the coag results and you have to determine what product to give the patient (cryo, FFP, Factors). Study the coagulation cascade.
Also, I had several management type questions (budgeting, calculating FTEs, cost effectiveness of instruments, etc..).
Review blood administration and how to calculate the infusion rate.
Hope this helps. Good luck on your test!!!