## Posted by R.Anirudhan

Unit -1

1. Explain with neat sketches the principal of operation of a dc generator?          (16) -expected
2.(i)Explain torque speed characteristics of a dc shunt and dc series motor with relevant
derivation to justify their shape? (10)
(ii)Explain the method of speed control of dc motor with field control.(6)
3.. (i) Derive the emf equation of dc machine how can its direction be obtained? (8)
(ii) Explain the various types of core losses? (8)
4.. (i) Derive the emf equation of dc machine how can its direction be obtained? (8)
(ii) Explain the various types of core losses? (8)
5. Explain Swinburne’s test of predetermination of efficiency of dc machine?(16)-expected

Unit 2

1.. Describe the tests to determine and explain how the regulation of the transformer is
determined form the diagram (16)
2 (i) Explain the construction of a single phase transformer?       (8)
(ii)Discuss the working principle of a transformer?       (8)
3. Draw the approximate equivalent circuit of single phase transformer and identify the
various parameters?     (16)

4.What are the losses in a transformer? Derive the condition for maximum efficiency?     (10)

Problems -(expected) (8)

Unit -3

1. (i)Explain double revolving field theory as applied to a single phase induction motor?        (10)
(ii)Explain shaded pole induction motor with diagram?    (6)
2.Derive the expression for torque developed in a 3 phase induction motor and hence deduce the condition for maximum torque and aloes power and efficiency?   (16) -expected
3. (i)Explain rotor resistance speed control of a three phase induction motor?                   (8)
(ii)Explain the principal of operation of three phase induction motor in detail?       (8)
4.Explain the methods of starting of induction motor?                                                           (6)
5. (i)Explain the speed methods of making single phase induction motor self starting?     (8)
(ii)Explain the speed control of induction motor form stator side?               (8) -expected
+ Problems

Unit -4

1. (a) Briefly discuss the construction of the following :
(i) Stator of synchronous machine ( 8)
(ii) Salient pole and cylindrical rotors. (8)
2. Explain the construction and operation of the following :
(i) Reluctance motor (8)
(ii) Hysteresis motor. (8)
3.    Explain in detail the MMF or EMF method of obtaining regulation of an alternator. (16) -expected

Unit -5

1. Explain the different types of EHVDC system? (16) -expected
2. Explain in detail about the various types of cables with diagram?  (16)
3. (i)What are the main components used in transmission and distribution systems? Write down the functions of each. (Marks 8)
(ii) Compare overhead lines and underground cable systems. (Marks 8)
4.Draw a single line diagram showing the essential parts in a modern power system network
and explain the components?

ALL THE BEST ...

by R.Anirudhan

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