Engineering BE Electrical Engineering Sem 8 December 2018 2018 Design Management And Auditing Of Electrical Sysrems Question Paper - Mumbai University | munotes

Questions asked in this paper

1. Q1 Question No.1 is Compulsory
2. Q2 Answer any three out of remaining five questions
3. Q3 Assume any suitable data wherever required but justified the same
4. Q4 Illustrate answer with sketches wherever required
5. Q1 State whether true or false and justify the same (Any five)
6. Q1 Soft starter provide significant energy savings in case of variable torque load 2 marks
7. Q2 In a distribution system air circuit is generally used as main circuit breaker 2 marks
8. Q3 Electronic ballast will improve energy efficiency 2 marks
9. Q4 Energy efficient motor is more compact in size compared to standard motor of
10. Q5 Derating factors does not play vital role in cable sizing and selection 2 marks
11. Q6 In a distribution network, Dyn11 grouped transformer is generally used Name and explain the function of following protective devices (05) 2 marks
    • i) li) iv) No.32 v)
12. Q1 What can you say about energy monitoring and Targeting. List out the elements of monitoring and targeting 5 marks
13. Q2 a) _ From the data given below, 10 marks
    • i. Draw the SLD showing the location of loads metering devices and various protective devices and their ratings
    • ii. Calculate the rating of transformer required for the loads uli. Specify the ratings of HT and LT (main) circuit breaker Type of Load in Efficiency | Power | Load Diversity
    • b) Discuss various energy efficient technologies used to improve performance of Q A MCC supplies power to 5 motors each of 50Hz, 440V, lag (10) operating at 87%, 1440rpm, delta connected I.M. Distance between MCC and motor installation is 40m. Ambient temp is Fault level at distribution point is 20kA. Assume type F installation. Size the copper cable for supplying power from MCC to motor and specify the same. Make suitable assumptions if necessary with justifications Paper Subject Code: 52801 Design , Management & Auditing of Electrical Systems 10
    • b) What are the factors are to be considered while selection and installation of set? Explain in detail
14. Q4 a) What way you would design illumination system for a reading room with dimensions (20L*15B*3.5H) in meter. Develop the lighting layout and justify the various assumptions 10 marks
    • b) How would you classify types of installation of capacitor bank in detail? 10
15. Q5 a) Define Energy Audit? Explain need of energy audit? Explain in detail the steps taken to perform detailed audit 10 marks
    • b) How would you categorize different means to achieve the energy efficiency in motor? Explain in detail 10
16. Q6 Write a short note on (any four) 20 marks
    • ii) UPS
    • v) Elementary Diagram Data for Illumination Design problems Type of Lamp
17. Q1 Fluorescent (T8/T5) 18 (82/84/86) 1300 Paper Subject Code: 52801 Design , Management & Auditing of Electrical Systems Current-carrying capacities and associated vollage drops for twin and ati E to Installation method K of Fig. 1 Volt urrent Voit Current. Volt on FOR AMBIENT TEMPERATURE FACTORS: Current-carrying capacities and associated voltage drops for twin and Conduct cable One twin cable phi | One three -or- four FOR AMBIENT TEMPERATURE Correction factors for groups of more than three single-core cables or more than one multicore cables or more than one multicore cables Multicore cables: Number of cables (Factors to be applied 4 5 7 10 to the values for one NOTES: 1. These factors are applicable to groups of cables all of one size equally loaded, including groups bunched in more than one plane
18. Q2 Where, spacing between adjacent cables exceeds twice their overall diameter, no reduction factor need be applied

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