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Q The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to______________?
  • A A. lubricate the contacts
  • B B. insulate the contacts from switch body
  • C C. extinguish the arc
  • D D. all of the above
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Word of the Day
22 Jul
Combative
ready or eager to fight or argue.
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