LEVEL 1

1. What is a shell type transformer?
2. Explain the four oil preservation system designs?
3. What is the difference between isolator and circuit breaker?
4. Explain the importance of isolator in power system?
5. Why lightning arrestors are used?
6. Explain why instrument transformers are used ?
7. Go through the specification of any current transformer.
8. Explain why bus-coupler is used?
9. What is a ring-bus bar system? Explain in brief?
10. What does a switch gear include?
11. What are the advantage of SF6 switch gear?

LEVEL 2

1. If the spacing between the members of a bundled conductor is increased how does the inductance and capacitance vary?
2. What is the power factor of a cable whose loss angle is δ?
3. What are travelling waves? How are coefficients of reflection and refraction obtained?
4. What are the various quantities associated with bus? How many among them are required to perform load flow analysis?
5. What are sequence components? What is their significance?