At which conditions does the arm blower have the highest effeiciency?

Question

Question Quiz BPL Hot Air - Balloon Pilot License - Principles of Flight (Balloon)

QuizVDS · Accepted Answer

By completely filling the balloon opening with the air beam.

QuizVDS · Answer

With as small distance to the balloon opening as possible.

QuizVDS · Answer

By evenly swiveling for better air spreading.

QuizVDS · Answer

By placing the blower inside the hull.

BPL Hot Air - Id 384 - At which conditions does the arm blower have the highest effeiciency?