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單項(xiàng)選擇題

Which of the following types of motors is often designed for use in correcting power factor?（）

A.Polyphase
B.Wound-rotor
C.Induction
D.Synchronous

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單項(xiàng)選擇題

Power transformers are rated in （）.

A.kilowatts
B.ampere-turns
C.kilowatt-volts
D.kilovolt-amperes

單項(xiàng)選擇題

The purpose of DC generator brushes is to （）.

A.neutralize armature reaction
B.conduct electric current to an outside circuit
C.convert DC current to AC current
D.provide excitation to a DC generator

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Which of the following types of motors is often designed for use in correcting power factor?（）

你可能感興趣的試題

Power transformers are rated in （）.

The purpose of DC generator brushes is to （）.

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