EE6356 ELECTRICAL
MACHINES AND POWER SYSTEMS, Second year, Department of Robotics and Automation Engineering,
Model Exam Questions
PART
A(10*2=20)
1. Define
critical resistance
2. Define back emf
3. Why transformer rating expressed in terms KVA.
4. Define regulation and efficiency of a
transformer.
5. Define slip of an induction motor.
6.List the various methods of speed control of 3
phase induction motor.
7. What is meant by synchronous reactance.
8. What is hunting.How is hunting minimized.
9. What are principle divisions of an electric
power system.
10. Define substation.
PART-B
(5X13=65Marks)
11. a) Explain working principle, construction
and induced emf of the DC generator.(13) (or)
11. b. i)
Write speed and torque equation of DC motor.(07)
ii) Explain the characteristics of DC motor.(06)
12. a. i) Write emf equation of transformer.(08)
Ii)Explain constructional details of a transformer.(05)
(or)
b.i)Explain equivalent circuit of
transformer.(08)
ii) Explain voltage regulation of a transformer.(05)
13.a.i) Write down torque equation of three phase
induction motor.(07)
ii) Explain Speed control of three phase induction motor. (06)
(or)
b.i) Explain starting method of three phase
induction motor.(07)
ii) Equivalent circuit of 3 phase induction motor. (06)
14. a) Explain construction, working principle
and induced emf of alternator.(13)
(or)
b. i) Classification of stepper motor.(05)
ii) Explain the details of reluctance motor.(08)
15. a. i )Draw and explain the structure of
electric power system.(06)
ii)
Explain the details about distribution system.(07)
(or)
b. i)
Explain and classification of substation.(05)
ii)
Draw and explain the substation layout.(08)
PART-B (1X15=15Marks)
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