STUPIDSID
1 (a)
Why induction motor is self-started? Explain with rotating magnetic field.
7 M
1 (b)
What is construction difference between slip-ring and squirrel cage induction motor? What are the merits of each?
7 M
2 (a)
Derive EMF equitation of single phase transformer. Which parameters are responsible for variation in output voltage?
7 M
Answer any one question from Q2 (b) & Q2 (c)
2 (b)
Explain construction difference between core type and shell type transformer.
7 M
2 (c)
Explain scott connection in transformer.
7 M
Answer any two question from Q3 (a), (b) & Q3 (c), (d)
3 (a)
What are the different conditions for parallel operation of two transformers?
7 M
3 (b)
Explain open circuit and short circuit test on single phase transformer.
7 M
3 (c)
Explain working of transformer under NO load condition with the help of vector diagram.
7 M
3 (d)
Explain equivalent circuit of single phase transformer.
7 M
Answer any two question from Q4 (a), (b) & Q4 (c), (b)
4 (a)
What is slip in induction motor? Explain torque/slip characteristics of induction motor.
7 M
4 (b)
Derive equitation of starting torque and running torque of induction motor.
7 M
4 (c)
What pitch factor and distribution factor in alternator?
7 M
4 (d)
Explain ZPF method for finding regulation in alternator.
7 M
Answer any two question from Q5(a), (b) & Q5 (c), (d)
5 (a)
What is need of starter in DC machine? Explain construction and working of three point starter.
7 M
5 (b)
Explain different type of DC generator according to its field winding.
7 M
5 (c)
What is load factor, diversity factor and plant utilization factor?
7 M
5 (d)
Explain three phase four wire and three phase three wire system. Explain merits of each.
7 M
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