Question 4Electricity & Electronics - Assistant Engineer
70% to passWhat type of AC motor would use a rheostat in the rotor circuit to vary the speed of the motor?
Asynchronous motor
Bregenerative braking motor
Csquirrel-cage induction motor
Dwound-rotor induction motor
AI Explanation
The correct answer is D) wound-rotor induction motor. In a wound-rotor induction motor, the rotor winding is connected to external resistors or a rheostat. Varying the resistance in the rotor circuit allows the motor speed to be adjusted, which makes the wound-rotor induction motor well-suited for applications that require variable speed operation. The other options are incorrect because: A) synchronous motors do not use a rheostat in the rotor circuit to vary speed, C) squirrel-cage induction motors have a fixed rotor design that cannot be adjusted, and B) regenerative braking is a separate function not related to varying motor speed.
Related Questions
Q@q.QuestionNumber:What statement is true concerning speed control of a shunt wound DC motor? Q@q.QuestionNumber:In an impressed current cathodic hull protection system, what statement is true ... Q@q.QuestionNumber:According to 46 CFR, Subchapter J (Electrical Engineering), which of the followi... Q@q.QuestionNumber:Referring to figure "4" of the illustration, what type of logic gate is symboliz... Q@q.QuestionNumber:Referring to the illustration of a steering gear hydraulic power unit motor cont...
Ready to test your knowledge?
Take a Electricity & Electronics - Assistant Engineer Practice ExamOfficial Resources
Want to practice with timed exams?
Download Coast Guard Exams for the full exam experience.
Get the App