EASA Module 7 Practice Questions - EASA Part-66 Module 07 - Maintenance Practices Exam

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An electrical fire breaks out in an avionics rack. Which extinguishing agent is most appropriate because it is electrically non-conducting and leaves no residue?

Water (Class A agent) on energised electrical equipment, creating shock and short-circuit risk. Halon / clean-agent (or CO2) suitable for Class C electrical fires Foam (AFFF) on live avionics, where conductive foam can spread damage and shock risk. Dry chemical powder (ABC) on energised racks, leaving conductive residue that harms avionics.

Correct Answer:

Halon / clean-agent (or CO2) suitable for Class C electrical fires

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