Electrical 4th sem transformer important questions diploma

1. Classify the Transformer based on construction type and applications.
2.  Explain the function of following parts in transformer transformer oil Core.
3.  Explain the losses which occur in a transformer. 
4. Compare auto transformer with two two winding transformer. 
5. Explain how torque is produced in the rotor of an induction motor.
6.  Draw and explain torque slip curve of induction motor.
7.  Explain the construction of soft starters. 
8. Explain the operation applications of synchronous motor.
9.  Explain the working principle of a transformer with neat sketch. 
10. Define the suitable equation voltage regulation of a transformer and efficiency of a transformer. 
11. List the advantages of three phase transformer over single phase transformer. 
12. Explain air blast cooling and oil natural cooling method employed in transformer. 
13. With a neat diagram explain the construction of squirrel cage induction motor. 
14. State the condition of maximum starting torque in induction motor explain the effect of supply voltage on starting torque. 
15. Explain the speed control of induction motor by changing of poles method. 
16. Explain the necessity of starter list various method of starter induction motor. 
17. Explain the working principle of synchronous motor with its diagram. 
18. Explain V curve with sketch.
19.  Explain the construction of shaded pole motor. 
20. List the characteristics of capacitor start capacitor run single phase motor. 
21. Write a short note on transformer. 
22. What are the factors to be considered while selecting shell type or core type transformer. 
23. Explain construction of three phase transformer. 
24. Draw the diagram of Transformer on load with example.
25.  Explain why the synchronous motor is not self starting full stop explain the effect of changing in excitation and constant load on synchronous motor.
26.  Explain circuit diagram of short circuit and open circuit test are conducted on single phase transformer. 
27. Skip the condition for maximum efficiency of a transformer. 
28. Explain the necessity and condition for parallel operation of two single phase transformer. 
29. Find the effective resistance of a transformer as referred to primary and referred to secondary.
30.  Explain how the rotor rotating magnetic field is produced in the state of three phase induction motor. 
31. Derive the equation for starting torque of an induction motor. 
32. Explain with sketch the construction and working of star delta starter. 
33. Explain magnetic levitation. 
34. Draw the sketch of resistance with induction motor and explain the operation. 
35. Explain hunting and its prevention full stop extend the speed control of 3 phase induction motor by varying frequency method.
36.  Write the relationship between rotor power input rotor copper loss mechanical power developed and slip of induction motor.