When checking a balloon’s fuel system for leaks, which senses are used?

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Multiple Choice

When checking a balloon’s fuel system for leaks, which senses are used?

Explanation:
Detecting a fuel leak relies on two practical senses: hearing and smelling. Propane is odorized so even small leaks emit a noticeable odor, helping you detect them by the nose. At the same time, leaking gas often produces a distinct hiss, which you can hear. Visual checks alone can miss leaks that are hidden or too small to see, and relying on just one sense may not catch a slow escape. Using both hearing and smelling together gives the most reliable early warning during checks.

Detecting a fuel leak relies on two practical senses: hearing and smelling. Propane is odorized so even small leaks emit a noticeable odor, helping you detect them by the nose. At the same time, leaking gas often produces a distinct hiss, which you can hear. Visual checks alone can miss leaks that are hidden or too small to see, and relying on just one sense may not catch a slow escape. Using both hearing and smelling together gives the most reliable early warning during checks.

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