Electric Traction Motors Interview Questions:

Following are the below Electric Traction Motors Interview Questions and Important Questions which is very useful for interviews and exams

1. Briefly discuss the special design features of traction motors.

2. Discuss briefly the desirable properties of traction motors.

3. Explain various characteristics that an ideal traction motor should possess. Discuss suitability of electric motors for main line, suburban and urban traction.

4. Discuss the suitability of dc series motor for its application in electric locomotive for traction duty.

5. Discuss the advantages of series motors for electric traction on suburban railways.

6. Explain the merits of dc series motor that make it a more suitable drive for electric traction than other drives.

7. Explain load sharing with respect to traction motors (i) separately excited dc motors (ii) dc series motors.

8. What is the effect of changing wheel diameter and gear ratio on the characteristics of a motor ?

9. Explain how the difference in driving wheel diameters due to unequal wear affects the sharing of load by two similar series motors, working in parallel, driving an electric train.

10. What type of ac motor is usually employed for single phase electric traction? Discuss briefly the principal features in the construction of the motor and analytically how good commutation and high power factor are obtained. For what frequency and voltage are such motors usually built and why ?

11. Explain briefly the construction and characteristics of ac series motor, pointing out how they differ from the dc type. In what way is the good commutation and high power factor assured ?

12. How a good power factor and commutation can be obtained in ac series motors ?

13. Compare the use of dc series motor and ac series motor in electric traction

14. Compare the suitability of dc series motor for traction duty versus dc shunt motor and single phase ac series motor.

15. Describe with neat sketches the construction and working principle of high acceleration linear induction motor. Discuss its advantages and disadvantages.

16. Explain the theory, working and characteristics of linear induction motor for traction purposes.

17. Write short notes on the following:

• Design features of traction motors.
• Traction motors.
• Series motor for electric traction.
• Suitability of ac and dc series motors for traction service.
• Suitability of squirrel-cage induction motor for traction drives.
• Linear induction motor.
• Selection of traction motors.