Within what type of enclosure must a torch be used in a repair garage where motor fuels are dispensed?

Using a torch in a repair garage where motor fuels are dispensed requires a fire-rated enclosure. This is essential for minimizing the risk of fire or explosion, as the presence of flammable fuels creates a hazardous environment. Fire-rated enclosures are specifically designed to withstand high temperatures and prevent the spread of fire, thus offering adequate protection against combustion hazards that could arise from using a torch.

In environments where flammable substances are handled, it is crucial to comply with safety regulations and standards, which often dictate the use of various protective measures, including fire-rated construction materials. Such enclosures not only help contain any potential incidents but also provide a safer atmosphere for repair operations that involve heat-generating tools like torches.

While ventilated spaces are important for dispersing flammable vapors, and sealed areas may prevent the ingress of foreign materials, these features alone do not address direct fire safety needs as effectively as fire-rated enclosures do. Sound-proof enclosures, while useful in reducing noise, do not contribute to fire safety and are unrelated to handling flammables. Thus, the requirement is clearly to provide a fire-rated enclosure when using a torch in proximity to motor fuels.