If you are talking about the practice test that is in the registration booklet, then your scores on the actual exam will probably be 2-3 points lower.
The exam in the ADA booklet is a joke and should have been discontinued a long time ago. I'm sure at one point it was a fairly decent reference for the real exam, but it is nearly archaic now and doesn't reflect much of the real exam.
I'd say that those questions accurately reflect the easiest questions that you'll see on the DAT. People who haven't studied specifically for the DAT but have competed all the prereq courses that are necessary for the DAT, should score 18-19s on that exam in the ADA booklet without much trouble at all.