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11th National Certification Exam Energy Managers & Auditors FEBRUARY 2011 Paper 3

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Jawaharlal Nehru Technological University (JNTUH), Hyderabad

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Paper 3 Set A Key Regn No: _________________ Name: ___________________ (To be written by the candidate) 11th NATIONAL CERTIFICATION EXAMINATION February, 2011 FOR ENERGY MANAGERS & ENERGY AUDITORS PAPER 3: Energy Efficiency in Electrical Utilities Date: 06.02.2011 Timings: 0930-1230 HRS Duration: 3 HRS Max. Marks: 150 General instructions: o o o o o Please check that this question paper contains 17 printed pages Please check that this question paper contains 64 questions The question paper is divided into three sections All questions in all three sections are compulsory All parts of a question should be answered at one place Section I: (i) (ii) (iii) 1. 2. 3. 4. OBJECTIVE TYPE Marks: 50 x 1 = 50 Answer all 50 questions. Each question carries one mark. Please hatch the appropriate oval in the OMR answer sheet with Black Pen or Black HB Pencil, as per instructions. Select the wrong statement: a) lower the heat rate of a power generating unit, higher is the generation efficiency. b) one kilo Watt hour of electrical energy being equivalent to 3600 kilo Joules of thermal energy c) Heat Rate is directly proportional to the efficiency of power generation. d) design Heat Rate of a 210 MW thermal generating unit is higher than that of a 110 MW thermal generating unit. If power factor is improved from PF1 to PF2 then the reduction in distribution losses in an electric network is proportional to : a) ratio of PF1 to PF2 b) square root of (PF1/PF2) c) square of (PF1/PF2) d) none of the above In the BEE labeling programme for distribution transformers, the total transformer losses at a) 50% and 100% loading have been defined. b) only 50% loading have been defined. c) only 100% loading have been defined. d) 25%, 50% and 100% loading have been defined. A 5 kVAr, 415 V rated power factor capacitor was found to be having 5.5 kVAr operating capacity. The operating supply voltage at the same supply frequency would approximately be a) 400 V b) 415 V _______________________ Bureau of Energy Efficiency c) 435 V d) none of the above

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