itgle.com

While paralleling two AC generators using synchronizing lamps only, both lamps will go dark when the generators are______.A.running at the same speedB.groundedC.of the same polarityD.in phase

题目

While paralleling two AC generators using synchronizing lamps only, both lamps will go dark when the generators are______.

A.running at the same speed

B.grounded

C.of the same polarity

D.in phase

相似考题

1.Then Eagle is left with only two options: die or go through a painful process of change _____ lasts 150 days for survival.A、whoB、whatC、whichD、it

2.Let’s go to ______ cinema – that’ll take your mind off the problem for _____while.A. the; the B. the; aC. a; theD. a; a

3.( ) can provide an asynchronous link between two ac electric power system with different nominal frequencies.A.The HVDC (high voltage DC) transmissionB.The EHV (extra-high voltage) AC transmissionC.The AC distributionD.Generators

4.I go swimming on ( ) Thursdays for two hours.A. /B. aC. an

参考答案和解析
正确答案：D
更多“While paralleling two AC generators using synchronizing lamps only, both lamps will go dar ”相关问题

  • 第1题：

    We are interested in the desk lamps you () in the May issue of “Good Housekeeping”.

    A、advertising

    B、being advertised

    C、advertised

    D、have advertised


    参考答案：C

  • 第2题：

    A Cluster Administrator is implementing a custom resource group for a new web application. The  goal is to ensure the resource group is always active. Preference should be given to the priority node at startup time，but fallback to the priority node should be scheduled during a nonbusy time.  Using custom resource group options， what combination best achieve the desired resource group behavior？（）   

    • A、 Online On All Available Nodes，using a setting timer
    • B、 Online On Home Node Only，using a fallback timer
    • C、 Online On Home Node Only，using both setting and fallback timers
    • D、 Online On First Available Node，using both settling and fallback timers

    正确答案:D

  • 第3题：

    A database administrator wants to design a multi-partition database that can take advantage of both intra-partition parallelism and inter-partition parallelism. Which configuration will allow the use of these types of parallelism while using the least number of hardware components (servers, processors)? （）

    • A、one server having at least two processors  
    • B、two servers having one processor and one logical database partition  
    • C、one server having four processors and two logical database partitions  
    • D、two servers each having four processors and two logical database partitions

    正确答案:C

  • 第4题：

    The database was started up using a text parameter file. What will be the default scope of changes made by using the SET clause of the ALTER SYSTEM statement？（）

    • A、Only MEMORY is updated.
    • B、Only SPFILE values are updated.
    • C、Only init.ora parameters are updated.
    • D、Both init.ora parameters and SPFILE values are updated.

    正确答案:A

  • 第5题：

    单选题
    The division of the kilowatt load between two AC generators operating in parallel is controlled by the settings and characteristics of the （）.
    A

    voltage regulators

    B

    field rheostats

    C

    reverse power relays

    D

    prime mover governors


    正确答案： C
    解析： 暂无解析

  • 第6题：

    单选题
    While paralleling two AC generators using synchronizing lamps only, both lamps will go dark when the generators are （）.
    A

    running at the same speed

    B

    grounded

    C

    of the same polarity

    D

    in phase


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Please fix some（）（货灯）.
    A

    hold lights

    B

    cargo lights

    C

    cargo lanterns

    D

    hatch lamps


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    备双锚。（）
    A

    Let go both anchors.

    B

    Drop both anchors.

    C

    Stand by two anchors.

    D

    Stand by both anchors.


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    _____ fashioned from a wick floating in a bowl of oil functioned according to the principle of capillary action.
    A

    All lamps early

    B

    Lamps all early

    C

    All early lamps

    D

    Early all lamps


    正确答案： B
    解析：
    这道题考察名词前的形容词的顺序问题。具体顺序应为：数量、大小、新旧、颜色、产地、材料、名词性形容词。按此顺序选项C正确，表示“所有早期的灯”。

  • 第10题：

    单选题
    If two AC generators are to be operated in parallel, the load is distributed evenly by（）
    A

    means of rheostat the governor settings

    B

    a balance coil excitation

    C

    adjusting the governor settings

    D

    changing excitation


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine （）
    A

    slightly less than the line frequency

    B

    the same as the line frequency

    C

    slightly greater than the line frequency

    D

    All of the above


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    I have only two tickets for TF Boys’ concert. ______ you ______ he can go on with me.
    A

    Either; or

    B

    Neither; nor

    C

    Both; and

    D

    Not only; also


    正确答案： C
    解析：
    我只有两张演唱会门票，所以你和他只有一个人可以跟我一起去。euther…or…表示两者择一，不是…就是…

  • 第13题：

    Compare a typical Distributed Replicated Block Device (DRBD) with MySQL Standard Replication using master－slave replication. Which two statements are correct?()

    A.Both technologies guarantee an identical copy of data on the secondary node

    B.Only MySQL can maintain a time-delayed copy of data on the secondary node

    C.Both technologies use the TCP/IP stack as their primary transmission medium

    D.DRBD uses shared-disk technology


    参考答案：B, C

  • 第14题：

    If two routers， both reachable from one another， originate functionally equivalent type 2 external- LSAs （i.e，same destination， cost and non-zero forwarding address ）， Which of the following statements wouldapply ？（）

    • A、Two LSAs will exist in the network for this destination， and both will be used
    • B、Two LSAs will exist in the network for this destination， but only the one generated by the highest RID ASBR will be used
    • C、Only the LSA generated by the highest RID ASBR will exist in the network
    • D、Only the LSA generated by the lowest RID ASBR will exist in the network

    正确答案:C

  • 第15题：

    Compare a typical Distributed Replicated Block Device (DRBD) with MySQL Standard Replication using master-slave replication. Which two statements are correct?（）

    • A、Both technologies guarantee an identical copy of data on the secondary node
    • B、Only MySQL can maintain a time-delayed copy of data on the secondary node
    • C、Both technologies use the TCP/IP stack as their primary transmission medium
    • D、DRBD uses shared-disk technology

    正确答案:B,C

  • 第16题：

    单选题
    For a propeller direct driven by the engine,（）.
    A

    the thrust pads are while metal faced on both sides

    B

    the thrust pads are while metal faced only on the forward side

    C

    the thrust pads are while metal faced only on the after side

    D

    intermediate shaft usually supported by a plummer block


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    A diesel driven emergency generator is prevented from being paralleled with the ships service generators by （）
    A

    an electrical interlock system

    B

    an automatic paralleling trip switch

    C

    the synchronizing oscilloscope

    D

    the reverse current relay


    正确答案： D
    解析： 暂无解析

  • 第18题：

    多选题
    Which two statements regarding compressed backups in Recovery Manager （RMAN） are true？（）
    A

    Backup compression is disabled by default.

    B

    Backup compression can be used with both backup sets and image copies.

    C

    Backup compression cannot be enabled using the CONFIGURE command.

    D

    Backup compression works only if the COMPATIBILITY parameter is set to 9.0.0.0 or higher.

    E

    Backup compression applies to only backup sets.

    F

    Backup compression applies to only image copies.


    正确答案： A,F
    解析： 暂无解析

  • 第19题：

    单选题
    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 （）
    A

    The breaker should be closed when one synchronizing lamp is dark and the other is bright

    B

    The breaker should be closed when both synchronizing lamps are bright

    C

    The frequency meter should be used to determine that the incoming alternator frequency is slightly higher than the bus

    D

    A portable phase sequence indicator must be used to verify the information from the lamps


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    救火队员之间用灯光保持视觉联系。（）
    A

    Fire party members maintain contact with lamps.

    B

    Fire party members maintain visual contact use lamps.

    C

    Fire party members maintain visual contact with lamps.

    D

    Fire party members maintain visual contact by lamps.


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    A ground in an electrical circuit outside the engine room （）.
    A

    cannot be detected tinder normal conditions

    B

    is of no consequence to engineering personnel

    C

    is indicated at the branch circuit breaker panel

    D

    is indicated by the ground detecting lamps on the main switchboard


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    If two AC generators are operated in parallel, the load is distributed evenly by（）
    A

    a rheostat

    B

    a balancing coil

    C

    changing field excitation

    D

    adjusting the governor settings


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    When paralleling two AC generators, the frequency of the machine coming on-line, immediately prior to closing its breaker, should be （）
    A

    slightly less than the oncoming generator frequency

    B

    the same as the bus frequency

    C

    slightly greater than the bus frequency

    D

    the same as the bus voltage


    正确答案： A
    解析： 暂无解析

相关内容