More stupid question from me
1) Why do you have to use the same setup for quali and race?What is the point,these are two events held on different days,the conditions can change obviously...Even if they don't,what do they achieve with this rule?
It is only a relative determination. By that, I mean it establishes the pecking order for the start of the event of each car/driver combination with respect to the others at that point in time. This weekend, due to the rain in Australia, we will see what you asked about. One of the main problems with doing qualifying and racing on the same day is that it puts more pressure on the crews to do the inspection and maintenance in preparation for the race. I think they will be doing qualifying starting at 11am Melbourne time. Race is at 5pm. That means you have about 5 hours to do race preparation. On a normal weekend, I'm guessing that most F-1 races start at somewhere around Noon (maybe 11am, maybe 1pm). The 3 qualifying periods take about 90 minutes. So, from Noon, you would need to start qualifying at 5:30am. That doesn't make for a good spectator event.
2) Why do you have to start the race on the exact same set of tyres you qualified on?
It doesn't make a lot of difference as you have to run both dry compounds anyway.
3) Why is the testing so limited?Are the teams allowed to test on their own aside brom Jerez and Barcelona?
It is a VERY expensive proposition to haul people, cars, spare parts, telemetry equipment, etc. to various sites. When they test in Spain, at least they can drive the haulers and support vehicles from the UK, Switzerland, Italy, etc. to Spain (with the exception of the Channel crossing). If you didn't limit it in some way, it becomes a spending war. For example, Ferrari has their own test track, Fiorano. It is completely instrumented and even has a water system where they can wet the entire 3km track. Obviously that is a VERY expensive proposition that many other teams would be hard pressed to match. If you didn't limit it, then it becomes an automatic spending war and he who has the most $$$$$$$ usually wins.