搜题
用户您好， 请在下方输入框内搜索其它题目：
搜题
题目内容 （请给出正确答案）
提问人：网友 发布时间：
【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

查看正确答案
更多“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.”相关的问题
第1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  

点击查看答案
第2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  

点击查看答案
第3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  

点击查看答案
第4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  

点击查看答案
第5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  

点击查看答案
第6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  

点击查看答案
第7题
[单选题] 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  

点击查看答案
第8题
[单选题] The part of the shipboard electrical system used to control the distribution of power to the branch circuits, is the （）.

A、bridge control panel  B、disconnect links  C、governor relay box  D、main switchboard  

点击查看答案
第9题
[单选题] An indicator on the main switchboard should show （） the emergency battery is in service or not.

A、that  B、when  C、if  D、whether  

点击查看答案
账号：
答题记录 我的收藏 我的题库
客服
TOP

请使用微信扫码支付

订单号：
遇到问题请联系在线客服