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Remembered NETA 2 Questions Help

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    Remembered NETA 2 Questions Help

    To Whom it May Help:

    Here are some questions from my NETA 2 test that I remembered but did not know. All help is greatly appreciated! I did not pass....AGAIN. 406/410. 4 points!!! Third time is charm right? Ugh! Best of luck to you all. You're gonna need it.

    1.) What is the small notch in a fuse for?

    2.) Which has the greatest TIME difference?

    a.) Extremely inverse
    b.) Inverse

    Can't remember C and D sorry. I feel this may be a Level 3 question and I can honestly say the whole test felt littered with Level 3 questions!

    3.) If a motor and chain are present on an OLTC, once the tap is raised to the highest level and it's still giving a raise signal, what should the OLTC motor do?

    a.) motor stop, stay at raised level
    b.) motor continue til raise signal is gone
    c.) motor continue in reverse til back to neutral
    d.) motor stop, cool down

    4.) Which XFMR test has the ability to magnetize the windings?

    a.) Power Factor
    b.) TTR
    c.) Excitiation
    d.) Zero sequence impedance

    I would usually say Winding Resistance but it was not one of my choices.

    5.) A Multimeter is device that:

    a.) is connected in series, low impedance
    b.) is connected in series, high impedance
    c.) is connected parallel, low impedance
    d.) is connected parallel, high impedance

    6.) What is the highest pickup for a low voltage-480 system ground?

    a.) 600 A
    b.) 800 A
    c.) 1000 A
    d.) 1200 A

    7.) Why do an insulation test between neutral and ground?

    I read this and was confused on the wording. Are you talking service entrance or non service entrance? The question did not specify! Come on NETA. Killin me smalls....

    8.) Interlock on MV MCC between switch and contactor. Why?

    9.) What is the role of a VFD?

    Watch for this one. The wording in the answers was VERY confusing.

    10.) Testing motor circuits would best be achieved by use of?

    a.) Ohmmeter
    b.) Phase-angle meter
    c.) Ammeter
    d.) ???

    And no, insulation test set was not a choice.

    11.) What is the standard for testing UPS Batteries?

    99% sure it is IEEE 450,1108, 1186. But what do I know??

    12.) What are considered Network Protectors?

    13.) You arrive to find a MV circuit breaker open. At the control panel in the adjacent room you see the mechanical switch open with a red flag. What would this indicate?

    a.) The breaker lost control power
    b.) The breaker was opened at the control panel

    I cant remember C and D, I'm sorry!! Throw out common sense, because they clearly arent looking for that in one of their answers.

    14.) What is the outdoor panel class?

    a.) Class 2
    b.) Class 3
    c.) Class 3R
    4.) Class 4

    15.) How can you recognize the difference between fiber optic cables and insulated cables?

    16.) What type of swtich is best used for commercial/light industrial services rated 2000/4000 A?

    a.) safety switch
    b.) metal enclosed interrupter
    c.) bolted-pressure switch
    d.) ??

    I remembered 50 questions but these are the ones I recall taking the most time on when taking the test. Again, I hope this helps anyone preparing for their upcoming test and I hope someone may be able to assist in answering some of these items!

    Thank you in advance and good luck to future test takers!!

    AP

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    Quote Originally Posted by A_Powers1992 View Post
    4.) Which XFMR test has the ability to magnetize the windings?

    a.) Power Factor
    b.) TTR
    c.) Excitiation
    d.) Zero sequence impedance

    I would usually say Winding Resistance but it was not one of my choices.
    Magnetize the windings? DC current in winding resistance will magnetize the core.

    Power Factor - Windings shorted together, would not magnetize windings.
    TTR - Primary and secondary voltage is measured, windings are "magnitized" just like in service.
    Excitation - Magnetic induction is created but other windings are shorted.
    Zero-Sequence Impedance - Not to familiar with this test but from what I understand it is a AC current based test.

    Based on this I'd say either TTR or Zero-Sequence but I'm leaning more toward TTR.

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    Quote Originally Posted by A_Powers1992 View Post
    2.) Which has the greatest TIME difference?

    a.) Extremely inverse
    b.) Inverse

    Can't remember C and D sorry.
    Extremely inverse (CO-11) is the sharpest curve.



    CO-6: Definite minimum
    CO-7: Moderately inverse
    CO-8: Inverse
    CO-9: Very inverse
    CO-11: Extremely inverse

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    Quote Originally Posted by A_Powers1992 View Post
    16.) What type of swtich is best used for commercial/light industrial services rated 2000/4000 A?

    a.) safety switch
    b.) metal enclosed interrupter
    c.) bolted-pressure switch
    d.) ??
    A fused bolted-pressure switch is what I usually find find for this type of service < 600V in my area.

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    Quote Originally Posted by A_Powers1992 View Post
    14.) What is the outdoor panel class?

    a.) Class 2
    b.) Class 3
    c.) Class 3R
    d.) Class 4
    This could be b, c, or d but NEMA 4 would offer the most protection.

    https://testguy.net/content/158-NEMA...ical-Equipment

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    Quote Originally Posted by A_Powers1992 View Post
    3.) If a motor and chain are present on an OLTC, once the tap is raised to the highest level and it's still giving a raise signal, what should the OLTC motor do?

    a.) motor stop, stay at raised level
    b.) motor continue til raise signal is gone
    c.) motor continue in reverse til back to neutral
    d.) motor stop, cool down
    I'm thinking motor should stop and stay at highest level. A?

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    Quote Originally Posted by A_Powers1992 View Post
    7.) Why do an insulation test between neutral and ground?

    I read this and was confused on the wording. Are you talking service entrance or non service entrance? The question did not specify! Come on NETA. Killin me smalls....
    Probably referring to the service entrance but this test is done to ensure that no other grounds are landed which could result in reduced GF sensitivity. Should be bonded at a single point near the transformer.

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    Quote Originally Posted by A_Powers1992 View Post
    13.) You arrive to find a MV circuit breaker open. At the control panel in the adjacent room you see the mechanical switch open with a red flag. What would this indicate?

    a.) The breaker lost control power
    b.) The breaker was opened at the control panel

    I cant remember C and D, I'm sorry!! Throw out common sense, because they clearly arent looking for that in one of their answers.
    Usually the flag just tells you the last position in which the mechanical switch was operated and nothing more.

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    Quote Originally Posted by A_Powers1992 View Post
    15.) How can you recognize the difference between fiber optic cables and insulated cables?
    This is usually fairly obvious by the jacket, any guesses on answer options?

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    Quote Originally Posted by SecondGen View Post
    Magnetize the windings? DC current in winding resistance will magnetize the core.

    Power Factor - Windings shorted together, would not magnetize windings.
    TTR - Primary and secondary voltage is measured, windings are "magnitized" just like in service.
    Excitation - Magnetic induction is created but other windings are shorted.
    Zero-Sequence Impedance - Not to familiar with this test but from what I understand it is a AC current based test.

    Based on this I'd say either TTR or Zero-Sequence but I'm leaning more toward TTR.
    Awesome! Thank you so much for your help!

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