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Which 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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