EX-603-A Utilization of Electrical Engineering - May 2022 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aDescribe the working of fluorescent lamps with the help of circuit diagram, explain function of each part.
   How to answer

   • Construction and circuit diagram of fluorescent lamp with choke, starter, electrodes
   • Working: ionization, arc discharge, UV excitation of phosphor
   • Function of each part: choke, starter, filaments, phosphor coating
2. 4 Marks
   bDerive the relation between plane angle and solid angle.
   How to answer

   • Definition of plane angle and solid angle
   • Consideration of arc length and spherical surface
   • Derivation of relation between radian and steradian
3. 3 Marks
   cExplain the laws of illumination.
   How to answer

   • Statement of inverse square law
   • Statement of Lambert's cosine law
   • Explanation with formulas and application
4. 7 Marks
   aList the types of lighting schemes. Explain the factors to be considered for designing the lighting scheme.
   How to answer

   • Types of lighting schemes: direct, indirect, semi-direct, semi-indirect, general
   • Factors: illumination level, uniformity, glare, shadows, colour, economy
   • Selection considerations for design
5. 7 Marks
   bList the advantages of electric heating, explain lossless type or high frequency induction furnace.
   How to answer

   • Advantages of electric heating: efficiency, control, cleanliness
   • Principle of lossless / high frequency induction furnace
   • Construction and eddy current heating explanation
6. 7 Marks
   aGive the induction heating operating principle and the application and with their limitation.
   How to answer

   • Operating principle: electromagnetic induction and eddy currents
   • Applications: surface hardening, melting, forging
   • Limitations: cost, depth of penetration, design complexity
7. 7 Marks
   bExplain the basic principle of electrolysis. What is electroplating and what for it is done?
   How to answer

   • Basic principle of electrolysis: Faraday's laws, ions discharge
   • Definition of electroplating
   • Purpose and process: corrosion protection, appearance, thickness
8. 7 Marks
   aExplain in brief Arc welding and resistance welding.
   How to answer

   • Arc welding: principle, electrodes, arc formation
   • Resistance welding: principle, types, pressure and current
   • Brief comparison of applications
9. 7 Marks
   bExplain electron beam welding method.
   How to answer

   • Principle of electron beam generation in vacuum
   • Construction: electron gun, focusing, work chamber
   • Process steps, advantages and applications
10. 7 Marks
    aDraw the general speed time curve of train running on main line and explain.
    How to answer

    • Neat speed-time curve with acceleration, free running, coasting, braking phases
    • Description of main line curve features
    • Explanation of each period significance
11. 7 Marks
    bExplain dead weight, acceleration weight and train resistance referred to traction.
    How to answer

    • Definition of dead weight and its effect
    • Concept of acceleration weight and effective mass
    • Train resistance components and traction requirement
12. 7 Marks
    aExplain the factors affecting specific energy consumption.
    How to answer

    • Definition of specific energy consumption
    • Factors: distance, speed, acceleration, gradient, train weight
    • Effect of each factor on energy consumption
13. 7 Marks
    bExplain the calculation of electrical loads for air condition.
    How to answer

    • Components of air-conditioning electrical load
    • Calculation method: cooling load, motor ratings, diversity
    • Steps with example assumptions
14. 7 Marks
    aWhat are the advantages of electric drive over all other drives? Explain in brief the selection of motor drive for particular application.
    How to answer

    • Advantages of electric drive: controllability, efficiency, maintenance
    • Criteria for motor selection: load, speed, duty, environment
    • Matching drive to particular application
15. 7 Marks
    bDifferentiate between group drive and individual drive.
    How to answer

    • Definition of group drive and individual drive
    • Comparison on basis of cost, flexibility, reliability, applications
    • Tabular differences
16. 7 Marks
    aWrite a short note on hybrid vehicles.
    How to answer

    • Definition and types of hybrid vehicles
    • Configuration: series, parallel, series-parallel
    • Advantages and applications
17. 7 Marks
    bWhat type of transmission system is used in electrical vehicle?
    How to answer

    • Types of transmission in electric vehicle: single speed, multi-speed
    • Need for gearbox vs direct drive
    • Common system used and justification