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13th National Certification Exam Energy Managers & Auditors SEPTEMBER 2012 Paper 4

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Jawaharlal Nehru Technological University (JNTUH), Hyderabad

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Click Here & Upgrade PDF Complete Expanded Features Unlimited Pages Documents Paper 4 SET A KEY 13th NATIONAL CERTIFICATION EXAMINATION FOR ENERGY AUDITORS September, 2012 PAPER 4: Systems Energy Performance Assessment for Equipment and Utility Date: 16.9.2012 Section - I: Timings: 14:00-16:00 HRS Duration: 2 HRS Max. Marks: 100 BRIEF QUESTIONS Marks: 10 x 1 = 10 (i) Answer all Ten questions (ii) Each question carries One mark S-1 In a vapour compression refrigeration system, why the heat rejected in the condenser is more than the heat absorbed in the evaporator ? Ans Because heat of compression is also added to it S-2 If the unit heat rate is 3120 kcal/kWh and the turbine heat rate is 2808 kCal/kWh what is the boiler efficiency ? Ans (2808/3120) x 100 = 90 % S-3 A rise in conductivity of boiler feed water indicates ____ . Ans Rise in the TDS level of feed water S-4 Why is it preferable to measure the flow at the inlet side of the fan? Ans Less turbulence S-5 The critical point of steam occurs at ____bar and _______ oC Ans 221.2 bar and 374.15oC S-6 In a heat exchanger _______ is the ratio of actual heat transfer rate to the maximum heat transfer rate. 1 _______________________ Bureau of Energy Efficiency

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