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Thread: Questions from building engineer?

  1. #1
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    Questions from building engineer?

    1) A 3 phase 480V motor drawing 62 amps. What is the electric motor force?

    2) A single phase 25HP motor draw ___ amps. How many kilovolts?

    These questions seem like some kind of joke to me but maybe you have an answer.

  2. #2
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    1. 480v RMS
    2. = to current in two ply tissue.
    Tom
    TBLO

  3. #3
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    read it again.

    Both should be answer #2.
    Tom
    TBLO

  4. #4
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    Quote Originally Posted by EEC View Post
    What is the electric motor force?
    That term has no meaning. The phrase "electromotive force" is essentially the same as voltage. You told us it was a 480 volt motor, so the emf is 480, as has already been said.

    Quote Originally Posted by EEC View Post
    2) A single phase 25HP motor draw ___ amps. How many kilovolts?
    Not enough information is given. If you tell me the current draw, I can get an idea of the voltage.


    How did you come across these questions?
    Charles E. Beck, P.E., Seattle
    Comments based on 2014 NEC unless otherwise noted.

  5. #5
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    Where questions came from

    A building engineer taking a test ask me to answer these questions for him. I could not understand why someone would present a question in this form. So I put out to see if there is something legit to answer. It appears that the questions are bogus.

  6. #6
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    They sound like phases often do when translated from one language to another.

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