Which of the following statements repr

Which of the following statements represents the main difference between a relay and a contactor?（）

AContactors control current and relays control voltage
BA relay is series connected and a contactor is parallel connected
CContactors can handle heavier loads than relays
DContactors are made from silver and relays are made from copper

参考答案

参考解析：

分类：船舶电气与船舶安全题库

相关推荐

1、Which of the following statements can

Which of the following statements can best be inferred from the passage?A Fishes only "speak" to communicate with each other.B Researches are n...

2、Which of the following statements desc

Which of the following statements describes the functions of a reservoir used in a hydraulic system?（）ADissipate heatBTrap foreign matterCSeparate air from the oilDAll of the above

3、Which of the following statements conc

Which of the following statements concerning fire-tube boilers is correct?（）ACombustion gases flow through the tubesBFlames impinge on the tubesCCombustion occurs in the tubesDWater flows through the tube

4、Which of the following statement rela

Which of the following statement related to PMO is not correct?（）AThe specific form, function, and structure of a PMO are dependent upon the...

5、Which of the following statements abou

Which of the following statements about authentication responses and conditions is true? （）(Choosetwo.)A When a router receives a failure respon...

6、Which of the following statements are

Which of the following statements are true regarding bridges and switches?（）A Switches are primarily software based while bridges are hardware ...

编辑推荐

属于向心性等张收缩的是（）。..

简述南京临时政府时期秘书的来源。..

感染性休克常继发于哪种细菌为主的感染（）..

测定氟化物样品时，用柠檬酸钠作总离子强度缓冲液，可以掩蔽.....

以下有关质量保证的叙述，错误的是（）..

动作技能的形成通常是以原有的动作联系为基础，所谓动作技能.....