Alberta Boilers Safety Association (ABSA) Practice Test

Question: 1 / 400

What is one method by which transformers are cooled?

By spraying water over the coils

Placing the core in an oil-filled tank

Using pyrene as a coolant

The most effective and widely used method for cooling transformers is placing the core in an oil-filled tank. This method utilizes oil, which has excellent thermal properties, to absorb heat generated during the transformer's operation. The oil not only cools the transformers but also acts as an insulating medium, providing electrical insulation between the live parts and the ground.

Spraying water over the coils is not a standard method as it can lead to insulation failures and creates an unsafe environment due to electrical hazards. Using pyrene as a coolant is not a conventional or recognized practice in transformer cooling, and operating without any cooling mechanism would lead to overheating and damage to the transformer. Hence, the correct answer highlights the importance of oil-filled tanks in effective transformer cooling and operation.

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Operating without any cooling mechanism

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