According to Coast Guard Regulations (46 CFR), which of the firefighting devices listed is not permitted for use in the engine room?

Correct Answer: Option C — All smooth bore firefighting nozzles

Smooth bore nozzles are prohibited in engine rooms because they produce a solid stream of water, which can cause dangerous splashing or spread flammable liquid fires. Regulations mandate the use of spray-type nozzles that provide better cooling and smothering effects while minimizing the risk of fire propagation.