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-   -   An automatic device that operates at present values is known as a what (https://www.askmehelpdesk.com/showthread.php?t=642757)

  • Mar 11, 2012, 06:41 PM
    tnteason
    An automatic device that operates at present values is known as a what
    An automatic device that operates at preset values is known as a what.
  • Mar 11, 2012, 06:52 PM
    stanfortyman
    Please do your own homework.
  • Mar 11, 2012, 07:21 PM
    thelionking12
    78. An automatic device that operates at present values is known as

    (A) mercury switch
    (B) relay
    (C) fuse
    (D) contactor.

    Get Answer:
    B - Relay

    Source :-
    http://www.electricalquizzes.com/Circuit_Breakers/Circuit_Breakers_MCQs_6.htm

    Google is a wonderful thing!

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