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Which consequence results when water within underground electrical transformer enclosures undergoes sustained evaporative cooling?

A)Decreased dielectric breakdown strength occurs
B)Increased oil viscosity affects cooling
C)Lowered conductive heat transfer develops
D)Enhanced corrosion resistance is produced

💡 Explanation

Decreased dielectric breakdown strength occurs as dissolved minerals concentrate and the water becomes more conductive due to evaporative cooling. Therefore, dielectric breakdown risks increase, rather than increased corrosion, because increased water conductivity facilitates arc formation.

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