The main purpose of an electric space heater installed in a large AC generator is to （）<br>A:prevent the windings from becoming brittle<br>B:prevent moisture from condensing in the windings during shutdown<br>C:prevent acidic pitting of the slip rings<br>D:keep the lube oil warm for quick starting

The main purpose of an electric space heater installed in a large AC generator is to （）
A:prevent the windings from becoming brittle
B:prevent moisture from condensing in the windings during shutdown
C:prevent acidic pitting of the slip rings
D:keep the lube oil warm for quick starting

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