Q1. Explain giving details of the various sections, the operation of a hydro-power station.
Q2. Explain briefly the factors to be taken into consideration while selecting a site for hydro-electric power station.
Q3. State the order of overall efficiency or thermal power station. Give reasons for its being of this order.
Q4. What is the fundamental difference between a thermal power station and nuclear power station?
Q5. State the considerations taken into; account for selecting a site for the construction of coal fired thermal, hydro and nuclear power station.
Q6. What are the different voltages, generally used in our country for generation, transmission distribution and utilization of electrical energy?
Q7. Discuss the advantages and disadvantages of transmitting large amounts of power over long distances using high voltage d.c. as compared to 3-phase a.c. Transmission.
Q8. What is the conductor materials employed for overhead transmission of electric power? Discuss their electrical and mechanical properties.
Q9. Describe with sketches a pin-type insulator used for high voltage lines showing clearly the fixing with cross-arm and binding of conductor. Why is insulator constructed with petticoats of different diameters?
Q10. Derive an expression for loop inductance in a single-phase transmission line.
Q11. Draw the layout of an a.c. secondary distribution system and explain it.
Q12. Mention advantages of ring main system over the radial system of distribution.
Q13. Explain giving reasons the basis for calculation of the cross-section of:
(i) Feeder (ii) Distributor.
Q14. Discuss most commonly used insulating materials employed for under ground cables.
Q15. Make a neat sketch of L.T. Line and prepare a list of the material required for one km long line.
Q16. Draw a neat sketch of an 11 KV line (one span only) and lable the various components.
Q17. What do you understand by substation? What are the important functions which can be performed at the substations?
Q18. State the advantages and disadvantages of outdoor substations over indoor substations.
Q19. Write a short note on a pole mounted substation.
Q20. Describe briefly the equipments (with their specifications) needed for an 11 KV pole mounted substation.
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