Question id 91 - Aircraft General Knowledge - Quiz BPL Hot Air - Balloon Pilot License

To induce a rotation movement in the liquid gas to get a better mixture
For cooling of the liquid gas after exiting the burner nozzles
To heat the liquid gas, so it will vapourize immediately after exiting the burner nozzle
To vapourize the liquid gas, so it will be emitted from the burner nozzle in gasous form