The basket ropes of a hot-air balloon are usually fixed to ...4
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Which parts of a hot-air balloon provide protection for the basket during landing?4
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The parapet height of a hot-air balloon basket is at least:4
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Why should a liquid gas bottle only be filled to 80% of its volume?4
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The boiling point of propane gas at atmospheric conditions is:4
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The hull fabric of a hot-air balloon undergoes the most continuous thermal stress in which area?4
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Damages to the hot-air balloon hull fabric are most critical in which area?4
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About the lower end of the pull rope of a hot-air balloon it can be said:4
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The vapour pressure of propane gas in a bottle depends in particular on:4
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Liquifaction of propane gas results in a reduction in volume to what fraction of the gas volume?4
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