An office trailer containing desks, documents, a computer, and a printer would be best protected by which extinguisher rating?

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Multiple Choice

An office trailer containing desks, documents, a computer, and a printer would be best protected by which extinguisher rating?

The main idea here is choosing an extinguisher that matches the hazards you’re most likely to encounter in an office trailer. In this setting, fires involving electrical equipment (computers, printers, cords) are a key concern, along with the possibility of small flammable-liquid spills from cleaners or inks. You want something that is safe to use on energized electrical equipment (Class C) and capable against flammable liquids (Class B). A rating of 10-B:C fits that need: it’s a dry-chemical extinguisher that can suppress modest liquid fires and is safe to operate on live electrical equipment, which helps prevent shock or further damage when fighting a fire around electronics. The other options either focus on a Class K (for cooking oils), or add a Class A rating for ordinary combustibles like paper, or cover metal fires (Class D). While an A rating can be useful for paper, the combination here emphasizes electrical safety and liquid fires, which are the most relevant risks in an office trailer with electronics. A rating that is just B:C is already standard for this environment, and the choices involving K or D don’t align with the typical hazards of an office trailer.

The main idea here is choosing an extinguisher that matches the hazards you’re most likely to encounter in an office trailer. In this setting, fires involving electrical equipment (computers, printers, cords) are a key concern, along with the possibility of small flammable-liquid spills from cleaners or inks. You want something that is safe to use on energized electrical equipment (Class C) and capable against flammable liquids (Class B). A rating of 10-B:C fits that need: it’s a dry-chemical extinguisher that can suppress modest liquid fires and is safe to operate on live electrical equipment, which helps prevent shock or further damage when fighting a fire around electronics.

The other options either focus on a Class K (for cooking oils), or add a Class A rating for ordinary combustibles like paper, or cover metal fires (Class D). While an A rating can be useful for paper, the combination here emphasizes electrical safety and liquid fires, which are the most relevant risks in an office trailer with electronics. A rating that is just B:C is already standard for this environment, and the choices involving K or D don’t align with the typical hazards of an office trailer.

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