Which statement about transformer oil is correct?

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Multiple Choice

Which statement about transformer oil is correct?

Transformer oil is used primarily to cool and insulate the transformer. It absorbs heat from the windings and carries it away to cooling surfaces, helping prevent overheating. At the same time, the oil provides dielectric insulation between energized parts and between windings and grounded structures, reducing the risk of electrical breakdown. It isn’t used to lubricate moving parts, since power transformers have few or no moving components and lubrication isn’t a needed function. Magnetic shielding is accomplished with magnetic materials, not oil, so the oil doesn’t serve as shielding. Coloring isn’t a functional purpose either, though dyes may be used in some cases for leak detection or identification; the main job of transformer oil remains cooling and insulation.

Transformer oil is used primarily to cool and insulate the transformer. It absorbs heat from the windings and carries it away to cooling surfaces, helping prevent overheating. At the same time, the oil provides dielectric insulation between energized parts and between windings and grounded structures, reducing the risk of electrical breakdown. It isn’t used to lubricate moving parts, since power transformers have few or no moving components and lubrication isn’t a needed function. Magnetic shielding is accomplished with magnetic materials, not oil, so the oil doesn’t serve as shielding. Coloring isn’t a functional purpose either, though dyes may be used in some cases for leak detection or identification; the main job of transformer oil remains cooling and insulation.

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