Anna University Model Question - I

Set A

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

Part A - (10 x 2 = 20 marks)

1. Mention the applications of auto transformer.

Refer Page No.1.79

2. Mention the different losses in transformer.

Refer Page No.1.81

3. What is back emf in DC motor?

Refer Page No.2.88

4. List the types of DC motor starters

Refer Page No.2.90

5. Write the function of damper winding in Synchronous machine.

Refer Page No.3.60

6. Why Single Phase Induction motor is not self starting?

Refer Page No.3.88

7. Define calibration.

Refer Page No.4.45min

8. Which torque is absent in energy meter? Why?

Refer Page No.4.46

9. Why transmission systems are mostly overhead systems?

Refer Page No.5.73

10. What is the need of earthing?

Refer Page No.5.71

Part B - (5 x 13 = 65 marks)

11. (a) (i) Derive the EMF equations of a Single Phase transformer.

Refer Page No.1.11

(ii) A Single Phase transformer with a 2 kVA rating has 480V primary and a 120V secondary. Determine the primary and secondary full load current of the transformer.

Refer Page No.1.17

(Or)

(b) Explain the various types of Three Phase transformer connections with neat

diagram.

Refer Page No.1.56

12. (a) With neat sketch explain the working of 4-point starter. List the advantages and

disadvantages.

Refer Page No.2.49

(Or)

(b) (i) Derive the torque equation of DC motor.

Refer Page No.2.11

(ii) Explain the various types of DC motors.

Refer Page No.2.23

13. (a) (i) Explain the operation of shaded pole induction motor with diagram.

Refer Page No.3.38

(ii) Explain why a synchronous motor does not have starting torque.

Refer Page No.3.56

(Or)

(b) (i) For a salient pole synchronous machine, derive an expression for different types of torque.

Refer Page No.3.62

(ii) Explain how a rotating magnetic field is produced in a Three Phase Induction motor.

Refer Page No.3.8

14. (a) (i) Explain the three phase power measurement using three wattmeter method.

Refer Page No.4.26

(ii) Explain the different types of standards.

Refer Page No.4.5

(Or)

(b) Describe the construction and working of a permanent magnet moving coil

instruments.

Refer Page No.4.13

15. (a) Discuss in detail about various types of protection devices used in power system. Refer Page No.5.29

(Or)

(b) Explain in detail about different first Aid Methods carried out from the Electric brainShock.

Refer Page No.5.67

Part C - (1 x 15 = 15 marks)

16. Explain the different speed control methods of Three Phase induction motors from Stator and Rotor side.

Refer Page No.3.19