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毎日1問、正解者には6つの富を報酬として、参加者には2つの富を報酬として支給;第472題

2016-03-23View Original

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選択問題:三相非同期電動機の直接起動がもたらす害害とは主に( )を指す。 A 起動電流が大きく、電動機の巻線が焼損する B 起動時に回路で大きな電圧降下が生じ、同じ回路の負荷が正常に動作しなくなる C 起動時の力率が低く、多大な無駄が発生する D 起動時の起動トルクが低く、負荷を駆動できない 答え:B 起動時に回路で大きな電圧降下が生じ、同じ回路の負荷が正常に動作しなくなる
Reply #22016-03-23
B起動時に回路内で大きな電圧降下が生じ、同じ回路の負荷が正常に動作できない
Reply #32016-03-23
B起動時に回路内で大きな電圧降下が生じ、同じ回路の負荷が正常に動作できない
Reply #42016-03-24
Aですね、ポンプはすべて三相誘導電動機で、原理は同じはずです

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