轮机英语【轮机长】题库 单选题 1分 The unit of electrical resistance is the ____. A. ampere B. volt C. watt D. ohm 点击查看答案 进入题库练习 参考答案: D 参考解析: 电阻的单位是Ω(欧)。 你可能感兴趣的试题 1 单选题 1分 The amount of voltage induced in the windings of an AC generator depends on _____. A. the number of conductors in series per winding B. the speed at which the magnetic field passes across the winding C. the strength of the magnetic field D. all of the above 点击查看答案 2 单选题 1分 Voltage generated by most AC generators is fed from the machine to the bus by means of ____. A. brushes on a commutator B. brushes on slip rings C. slip rings on a commutator D. direct connections from the stator 点击查看答案 3 单选题 1分 In a modern three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means________. A. The generator need not excitation. B. There are three phase winding on the rotor C. The winding on the rotor is for inputting excitation current D. The generator has brushes 点击查看答案 4 单选题 1分 Which of the following components are used to convert alternating current produced in the generator windings to direct current? A. Armature and equalizer B. Commutator and brushes C. Rotor and interpoles D. Field and exciter 点击查看答案 5 单选题 1分 The purpose of DC generator brushes is to ____. A. neutralize armature reaction B. conduct electric current to an outside circuit C. convert DC current to AC current D. provide excitation to a DC generator 点击查看答案