Anna University Model Question - II

B.E./B.TECH. DEGREE EXAMINATION, MODEL QUESTION PAPER

Part A (10 x 220 marks)

1. Define voltage regulation of a transformer

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2. List the types of transformer based on their construction.

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3. What is the function of starters in DC motor?

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4. Name any four applications of DC series motor.

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5. Write the expression for rotor frequency.

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6. Compare Capacitor start and capacitor start capacitor run Induction motor.

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7. List the possible causes of errors in moving iron instruments.

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8. State the disadvantages of PMMC instruments.

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9. What are the components of power systems?

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10. Who transmission lines are classified based on length?

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Part B - (5 x 13 65 marks)

11. (a) (i) Explain the principle of operation of Single Phase Transformer.

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(ii) Discuss the construction of Auto transformer.

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(Or)

(b) With neat sketch explain Transformer Open Circuit and Short Circuit Tests.

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12. (a) Explain the various methods of speed control on DC series motor and DC shunt motor.

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(Or)

(b) (i) Explain the construction of DC machine with neat diagram.

(ii) Discuss in detail about the construction and working principle of stepper motor.

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13. a) (i) Explain the working principle of Single Phase induction motor. Mention its four applications.

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(ii) Explain any one method of starting a synchronous motor.

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(Or)

(b) (i) Describe with neat sketches the constructional details of a salient pole alternator.

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(ii) Explain the construction of squirrel cage and slip ring Induction motor.

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14. (a) (i) Explain the construction of Dynamometer type moving coil instruments.

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(ii) Differentiate between C.T. and P.T.

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(Or)

(b) With a neat block diagram explain the construction and operation of Digital storage Oscilloscope.

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15. (a) Draw and explain the structure of power system including the voltage level in each transmission levels.

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(Or)

(b) What are the various methods of neutral grounding? Elaborate any two.

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Part C - (1 x 15 = 15 marks)

16. Starting from the first principles, develop the equivalent circuit of a Single Phase transformer.

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