yes you get 18 minutes for 12 deductive reasoning and 19 minutes for 10 sets of 3 true/false/cannot say verbal reasoning.
the verbal reasoning does not require any special preparation IMO (in general I think they are reasonably strict on the "can't say" if it does not follow truly logically based on the text, however) and the time limit is ample.
for the deductive reasoning the time limit is designed to cause maximum stress and make you fail due to poor time management. there are basically five question types:
- schedule the meeting in your own calendar, which is easy and doesn't take the full time but if you have spent long on the other types you will needlessly lose marks by not picking up here;
- schedule the meeting across multiple calendars, again easy marks;
- allocate the people to the meeting rooms, which is again pretty easy;
- rank the candidates one to six, which is a logic puzzle like the ones you can buy in newsagents basically, albeit the x✔ strategy doesn't necessarily work so more advanced techniques can be helpful;
- the monthly scheduling is tough but probably you could pre-print calendars for each day-of-the-week or use a second screen/second computer to make this more effective.
If you go over about 2 or 2.5 minutes per question (and you could easily spend five or more) on the last two types you will end up failing due to time management.
There is only one, fixed practice test for dr but if you do the general test it will give you questions from the dr pool and you can just answer randomly for the ones that are using numerical reasoning and inductive reasoning.