What type of heat dissipation takes place when the heat flows from the outer surface of the transformer part to the oil that cools it?(a) conduction(b) convection(c) conduction and convection(d) radiationThis question was posed to me in a job interview.Query is from Temperature Rise in Transformers topic in division Design of Transformers of Design of Electrical Machines

What type of heat dissipation takes place when the heat flows from the

1.	What type of heat dissipation takes place when the heat flows from the outer surface of the transformer part to the oil that cools it?(a) conduction(b) convection(c) conduction and convection(d) radiationThis question was posed to me in a job interview.Query is from Temperature Rise in Transformers topic in division Design of Transformers of Design of Electrical Machines
Answer» The CORRECT answer is (B) convection The explanation is: When heat flows from the outer surface of TRANSFORMER part to the oil which COOLS it, it is convection. In transformers all 3 types of heat dissipation occurs.

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