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← ScienceWhich outcome occurs when rapid heating in a closed boiler beyond design limits causes the water's phase transition to steam?
A)Catastrophic pressure vessel rupture occurs✓
B)Heat transfer rate increases gradually
C)Nucleate boiling regime is stabilized
D)Condensate forms mitigating superheating
💡 Explanation
A catastrophic rupture occurs because rapid steam formation dramatically increases the internal pressure, exceeding the boiler’s yield strength; this triggers instantaneous expansion– explosive boiling– rather than controlled steam generation, therefore structural failure rather than pressure relief valve actions.
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