轮机英语【大管甲类】题库 单选题 1分 TWO STEP CONTROLER ACTION is mainly__________. A. proportional control B. integral control C. derivative control D. on-off control 点击查看答案 进入题库练习 参考答案: D 参考解析: 双位控制器的动作主要是开关控制。 你可能感兴趣的试题 1 单选题 1分 ____ is (are) not supplied by main switchboard directly. A. Steering gear and windlass B. Navigation light and radio power panel C. Electric navigation device power box D. Daily fresh water pump 点击查看答案 2 单选题 1分 ____ is not a part of the main switchboard on board. A. Busbar B. Load panel of main generator C. Paralleling panel D. Shore connection box 点击查看答案 3 单选题 1分 ____ is not a part of the main switch board. A. Control panel of main generator B. Control panel of emergency generator C. Paralleling panel D. Load panel of main generator 点击查看答案 4 单选题 1分 ____ is not installed on the main switchboard. A. Ammeter and changeover switch B. Power factor meter C. Synchroscope D. Reverse sequence relay (逆序继电器) 点击查看答案 5 单选题 1分 A switchboard, for an AC electrical distribution system, will be provided with which of the following components? A. Frequency meter. B. Ammeter C. Voltmeter D. All of the above 点击查看答案