Download GTU BE/B.Tech 2017 Winter 8th Sem Old 180902 Electrical Power Utilization Question Paper

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1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

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1. Discuss major factors to be considered while selecting an electric drive. (07)
2. What is a Speed-Time curve? Discuss briefly the distinct period in a typical speed time curve of a train running on main line. (07)
3. Discuss the advantages and disadvantages of electrical drives. (07)
4. Explain following terms clearly. (07)
   (1) Tractive effort. (2) Co efficient of adhesion.
   

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   (3) Train resistance (4) Specific energy consumption of train.
   OR
   Write technical note on “Load equalization and flywheel”. (07)
5. What do you understand by Tractive efforts? Derive the expression for the same. (07)

1. Compare group drive with individual drive. (07)
   

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   OR
   What is Electric Braking? Explain regenerative braking in detail. (07)
2. Draw and discuss Speed-Time curves for Urban, Sub-urban and Main Line services. (07)
3. Describe running characteristics of DC series and shunt motors. (07)
4. Discuss various methods of Electric heating and explain any one in brief. (07)
   

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   OR
   Discuss various speed control methods of three phase induction motor in brief. (07)
5. Explain Induction heating in brief. (07)

1. State Faraday’s law of electrolysis and explain them clearly. (07)
2. Write a technical short note on Arc welding. (07)
   

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   OR
   State and discuss various types of resistance welding processes. (07)
3. Explain laws of Illumination. (07)