Which statement best describes a hazard associated with glass under fire conditions?

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Multiple Choice

Which statement best describes a hazard associated with glass under fire conditions?

When glass is heated in a fire, the outer layers expand while the inner material remains cooler, creating internal stresses. If a cold hose stream strikes hot glass, the rapid cooling causes thermal shock, making the pane crack or shatter suddenly. This can send dangerous shards flying and open a path for heat or water to pass through, creating an immediate safety hazard for firefighters. The statement captures this primary danger. Glass isn’t a fuel, so shattered glass doesn’t add to the fuel load. It also doesn’t reliably conceal fires—windows may still reveal heat or flames, and the risk isn’t about hidden fires. Spontaneous shattering and sudden structural collapse from glass are much less typical compared with the immediate danger of thermal-shock breakage when struck by a cold stream.

When glass is heated in a fire, the outer layers expand while the inner material remains cooler, creating internal stresses. If a cold hose stream strikes hot glass, the rapid cooling causes thermal shock, making the pane crack or shatter suddenly. This can send dangerous shards flying and open a path for heat or water to pass through, creating an immediate safety hazard for firefighters. The statement captures this primary danger.

Glass isn’t a fuel, so shattered glass doesn’t add to the fuel load. It also doesn’t reliably conceal fires—windows may still reveal heat or flames, and the risk isn’t about hidden fires. Spontaneous shattering and sudden structural collapse from glass are much less typical compared with the immediate danger of thermal-shock breakage when struck by a cold stream.

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