Hi Adi,
I think section 1.5 from the in-game help answers your question, I've pasted the section here below. Does that make it clear for you?
1.5. Qualifying
- runs automatically 10 minutes before the race, after practice is locked
- each driver gets one qualifying lap on a clear circuit
- you can not manage your cars during qualifying
- the chosen tyre compound for stint 1 in your race strategy will be used for qualifying
- conducted on low fuel with tyres at optimal temperatures
- boost and DRS technologies are not used on qualifying laps