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Home > Exam Questions > BPL Hot-Air Balloon Pilot Licence > Aircraft General Knowledge > What is the purpose of the sounding pipe valve?

73 - EASA BPL Hot-Air Balloon Theory in English - What is the purpose of the sounding pipe valve?

Question 73 - Aircraft General Knowledge - BPL Hot-Air Balloon Pilot Licence

It allows pressure equalization during cruise at high altitude

To indicate the volumetric filling limit

It prevents air from entering the burner system

For venting the liquid gas container bottle

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