In which situation is it NOT possible to achieve a pressure compensation between the middle ear and the environment?

Question

Question Quiz BPL Hot Air - Balloon Pilot License - Human Performance and limitations

QuizVDS · Accepted Answer

The eustachien tube is blocked

QuizVDS · Answer

During a light and slow climb

QuizVDS · Answer

Breathing takes place using the mouth only

QuizVDS · Answer

All windows are completely closed

BPL Hot Air: In which situation is it NOT possible to achieve a pressure compensation between the middle ear and the environment? Id: 194