An alternator switchboard has a synchroscope and synchronizing lamps, if the synchroscope is broken, which of the steps listed is the most essential before an alternator can be paralleled with the bus （）

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• （）is not installed on the emergency switchboard.

  A . Ammeter B . Voltmeter C . Wattmeter D . Synchroscope

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• An indicator on the main switchboard should show （） the emergency battery is in service or not.

  A、that B、when C、if D、whether

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• The various pumps and lines are （） to some extent so that each pump can act as an alternative for another.

  A . interlocked B . interconnected C . interfered D . interacted

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• The frequency of an alternator is controlled from the main switchboard by adjusting the（）

  A . frequency meter B . voltage regulator C . governor control D . sychroscope switch

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• Possible phase relationships between voltage and current in an alternating current circuit include which of the following conditions?（）

  A . Current and voltage may be in phase B . Current may lead the voltage C . Current may lag the voltage D . All of the above

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• In an alternating current electrical system, a low system power factor is a direct sign of （）

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• IS - IS is often considered an alternative to OSPF in the IP world. Which two statements identify similarities between IS -IS and OSPF?（）

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• As an alternative to setting the Visible property to No for the ORDERS_WINDOW, which built-in could you use to achieve the same result? （）

  A . HIDE_WINDOW  B . CLOSE_WINDOW  C . REPLACE_CONTENT_VIEW D . GET_WINDOW_PROPERTY

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• A switchboard for an AC electrical system requires the use of which of the following devices（）.

  A . Frequency meter B . Ohmmeter C . Induction voltage regulator D . Current transformer governor

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• A “dead front” switchboard is one （）.

  A . without switches on it B . with insulated switches and no exposed terminals C . without circuit breakers D . without safety hand nails nor rubber mat

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• Which of the listed sections of an emergency switchboard is used to supply power for alarm signals under emergency conditions?（）

  A . The generator and bus transfer section B . The 450 volt, 60 cycle, 3 phase bus C . The 120 volt, 3 phase, 60 cycle bus D . The 24 volt DC bu

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• On an Aironet card， LED 0 and LED 1 are blinking alternately.  What does this indicate？ （）

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• The frequency output of an operating alternator is controlled by the （）.

  A . relative speed of the rotor poles B . number of turns of wire in the armature coil C . strength of the magnets used D . output voltage

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• As to the economic role of advertising, it is so persuasive that it is ______ that a consumer will switch to an alternative product.

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• Tokyo wants to build a floating ________ in the sea as an alternative to the airport.

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• New ways to treat arthritis may （ ） an alternative to painkillers.

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• Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire？

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• An investor who wants to hedge against inflation by allocating a portion of a portfolio to alternative investments should most appropriately invest in:

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• When an investigator wants to test whether a particular parameter is greater than a specific value, he null and alternative hypothesis are best defined as:

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• When an investigator wants to test whether a particular parameter is larger than a specific value, the null and alternative hypothesis are best defined as:

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• If a four-engine air carrier airplane is dispatched from an airport that is below landing minimums, what is the maximum distance that a departure alternate airport may be located from the departure ai

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