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12th National Certification Exam Energy Managers & Auditors OCTOBER 2011 Paper 1

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Paper 1 Set A Key Regn No: _________________ Name: ___________________ (To be written by the candidate) 12th NATIONAL CERTIFICATION EXAMINATION FOR ENERGY MANAGERS & ENERGY AUDITORS October, 2011 PAPER 1: General Aspects of Energy Management & Energy Audit Date: 15.10.2011 Timings: 09:30-12:30 HRS Duration: 3 HRS Max. Marks: 150 Section II: SHORT DESCRIPTIVE QUESTIONS (i) (ii) Marks: 8 x 5 = 40 Answer all Eight questions Each question carries Five marks S-1 List any five clip-on / portable instruments used in energy auditing. Ans Power analyser, flue gas analyser, non-contact flow meter, lux meter, thermocouples, hygrometer, psychrometer, anemometer, tachometer, stroboscope, infrared thermometer etc S-2 The rating of a single phase electric geyser is 2300 Watts, at 230 Volt. Calculate: a) Rated current b) Resistance of the geyser in Ohms c) Actual power drawn when the measured supply voltage is 210 Volts Ans a)Rated Current of the Geyser, I = P/V= 2300/230 = 10 Ampere b)Resistance Value , R = V/I = 230/10 = 23 Ohms c)Actual Power drawn at 210 Volts = (V/R)*V = (210/23)*210 = 1917 Watt OR (210/230)*(210/230)*2300 = 1917 Watt 1 _______________________ Bureau of Energy Efficiency

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