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EX-803 (A) · Power Electronics Converters for Renewable Energy/Unsolved PYQ Paper

EX-803 (A) Power Electronics Converters for Renewable Energy - May 2023 Question Paper

  1. 7 Marks
    aExplain different methods available for aiming of lamp in flood lighting.
  2. 7 Marks
    bExplain the design considerations for auditorium lighting.
  3. 7 Marks
    aAn illumination of 25 lux is to be produced on the floor of a room $12\, \text{m} \times 9\, \text{m}$. 18 lamps are required to produce this illumination in the room, if $50\%$ of the emitted light falls on the floor. What is the power of the lamp in Candela?
  4. 7 Marks
    bExplain about metal arc welding, submerged arc welding methods with necessary illustrations.
  5. 6 Marks
    aDiscuss about the criteria to select frequency for heating processes.
  6. 8 Marks
    bA lamp of 500 candle power is placed at the centre of a room having dimensions of $20\, \text{m} \times 10\, \text{m} \times 5\, \text{m}$. Calculate the illumination in each corner of the floor and a point in the middle of a 10 m wall at a height of 2 m from floor.
  7. 7 Marks
    aFor a quadrilateral speed-time curve of an electric train, derive expression for the distance between stops and speed at the end of the coasting period.
  8. 7 Marks
    bAn electric train has an average speed of 42 km/h on a level track between stops 1.4 km apart. It is accelerated at 1.7 km/h/s and is braked at 3.3 km/h/s. Assuming tractive resistance as 50 N/t. allowing 10% for rotational inertia and efficiency to motors 85%. Estimate the specific energy consumption.
  9. 7 Marks
    aExplain the reasons for having greater coefficient of adhesion in electric traction when compared to steam traction.
  10. 7 Marks
    bExplain what do you mean by "Individual drive" and "Group drive"? Discuss their relative merits and demerits.
  11. 7 Marks
    aExplain about the factors affecting energy consumption in propelling the train.
  12. 7 Marks
    bExplain the effect of varying acceleration and braking retardation in traction.
  13. 7 Marks
    aWhy an energy management control system is required in an HEV?
  14. 7 Marks
    bDo you think an elaborate energy management system similar to that applied to a hybrid vehicle, is required in an electric vehicle? Explain.
  15. 4 Marks
    aDiscuss the following: Electric drives
  16. 5 Marks
    bDiscuss the following: Regenerative braking
  17. 5 Marks
    cDiscuss the following: Luminous intensity
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