Which may ignite fuel vapors?

Question 1 / 205eccef9ebacbc34ba4d4657d

Question 1 of 205eccef9ebacbc34ba4d4657d

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Question 1 of 20

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Which may ignite fuel vapors?

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🔍 Key Concepts

• Sources of ignition in engine and fuel spaces • How electricity and motors can create sparks or heat • The conditions required for fuel vapors to catch fire (ignition source + vapor + oxygen)

💭 Think About

• For each option, ask yourself: could this realistically create a spark, arc, or high heat near fuel vapors? • Think about where fuel vapors accumulate on a boat and what equipment or conditions are usually nearby. • Consider whether exam questions about safety often focus on a single cause or on recognizing multiple hazards at once.

✅ Before You Answer

• For each choice (A, B, C), decide: can this create sparks, arcs, or hot surfaces that might ignite vapors? • Remember that fuel vapors are heavier than air and collect in low spaces—what equipment or conditions are commonly present there? • Double‑check whether any option is clearly not a possible ignition source before ruling it out.

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Question 1 of 20

Which may ignite fuel vapors?

Loose wiring

Static electricity

An open and running motor

All of the above

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