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【单项选择题】

A switchboard, for a AC electrical distribution system, will be provided with which of the following components （）.

A、A.Frequency meter

B、B.Ammeter

C、C.Voltmeter

D、D.All of the above

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更多“A switchboard, for a AC electrical distribution system, will be provided with which of the following components （）.”相关的问题
第1题
[单选题] 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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第2题
[单选题] The most likely place for a fire to start through the process of spontaneous combustion is in （）.

A、an electrical switchboard  B、the pressure tanks  C、the fuel oil tanks  D、the oily rag bin  

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第3题
[单选题] Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire?（）

A、CO2  B、ABC dry chemical  C、CO2 propelled foam  D、All of the above  

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第4题
[单选题] It is well known that the whole power distribution of the ship’s electrical services mainly depend on the（）.

A、sub-boards  B、main switchboards  C、emergency switchboards  D、distribution boards  

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第5题
[单选题] The switchboards for a-csystems differ from the d-cswitch gear in that the open type panels are generally（） and the dead-front switch gear is the common rule.

A、permissibly  B、permissible  C、no permissible  D、not permissible  

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第6题
[单选题] 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 bus  

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第7题
[单选题] （）is not installed on the emergency switchboard.

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

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第8题
[单选题] （）is not installed on the emergency switchboard.

A、Control panel  B、Paralleling panel  C、Load panel  D、Busbar  

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第9题
[单选题] A class "C" fire would most likely occur in the （）.

A、engine room bilges  B、main switchboard  C、paint locker  D、rag bin  

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