While most dry-type air-cooled transformers are cooled by natural convection, it is sometimes necessary to design a transformer with ____ for additional cooling in order to reach maximum load rating.
A) forced-air fans
B) an attached radiator
C) an attached air conditioner
D) extra ventilation

Question

Quizplus · Accepted Answer

Forced-air fans provide additional cooling for dry-type air-cooled transformers, allowing them to reach their maximum load rating. An attached radiator or air conditioner may be used in some cases, but they are not as common as forced-air fans. Extra ventilation may also help with cooling, but it may not be sufficient on its own.

While Most Dry-Type Air-Cooled Transformers Are Cooled by Natural Convection