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Question 1 of 10
Pbg
medium
What is the 'appendix' (sometimes 'appendage' or 'neck') of a gas balloon envelope?
A
A. The structural load tapes at the bottom of the envelope
B
B. An open tube at the bottom of the envelope that allows gas to vent as the balloon ascends and pressure increases, preventing over-pressurization
C
C. The filling valve used during inflation
D
D. A separate small compartment for instrument storage
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