Engineering BE Electrical Engineering Sem 8 May 2023 2023 ELEC8Electrical System Design Management And Auditing 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 justify the same
4. Q4 Illustrate answer with sketches wherever required Answer the following (Any four)
   • a) Explain Elementary and interconnection diagram and their uses. 5
   • b) Explain benefits of power factor improvement 5
   • c) What is monitoring and targeting. State and explain in brief elements of M and 5
   • d) What is soft starter and what are its advantages. 5
   • e) Discuss bench marking and its type. State two benchmarking parameters. 5
5. Q2 a) The details of the load in a plant are as follows Calculate KVA rating of transformer which feeds the plant. Draw SLD showing relevant protective and metering devices. Find compensation required for each 10 marks
   • b) Explain Energy performance assessment of illumination by ILER method. 10
6. Q3 a) A 100Kw heater, 415V, 3 phase 50Hz, is to be connected to PCC. Cable length is 100m. The cable will run with two similar circuits in an unenclosed cable tray. Ambient temp is 40 deg Celsius. Fault level is Calculate the size of conductor and specify various assumptions Type of Cable Value of K(Cu) Value of K(Al) 10 marks
   • b) Explain cable management system. 10
7. Q4 a) A classroom accomodates 10 standard ceiling fans with 75W consumption. Energy auditor has suggested to replace them each by a BLDC fans of 28W The cost of one unit is Rs10 and cost of one BLDC fan is Rs. 3000. Find annual energy saving and simple payback. Assume number of working hours 08/day and 200 days in a year 10 marks
   • b) What is Energy Efficient Motor. What are the advantages of EEM over standard motor. How it is beneficial from energy saving point of view Paper Subject Code: 52871 Electrical System Design, Management and Auditing 10
8. Q5 a) Explain step by step approach towards load management. 10 marks
   • b) Explain Tendering process for the purchase of costliest equipments (open 10
9. Q6 a) Design a lighting system for a drawing Hall which measures 25m*10m*5m in dimensions. Assume and justify suitable assumptions. Find number of fixtures required to maintain average lux level of 300lux in the room. Draw lighting
   • b) Explain 10 Step methodology for energy auditing. Data for Illumination Design problems Type of Lamp 10
10. Q1 Fluorescent (T8/T5) 18 (82/84/86) 1300 Paper Subject Code: 52871 Electrical System Design, Management and Auditing Data for Cable Design problem Current-carrying capacities and associated voltage drops far twin and Installation methods A to C tot E Hol Installation method K of Fig. 1 Current-carrying capacities and associated voltage drops for twin and One three - or- ‘ore cable One twin cable One
    • a.c dc. ac. d.c FOR AMGIENT TEMPERATURE Correction factors for groups of more than one multicore cables Multicore cables: Number of cables the values for one cable) NOTES: 1. These factors are applicable to groups of cables all of one size equally loaded, including groups bunched in more than one plane
11. Q2 Where, spacing between adjacent cables exceeds twice their overall diameter, no reduction factor need be applied

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