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11th National Certification Exam Energy Managers & Auditors FEBRUARY 2011 Paper 4

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Paper 4 Energy Auditor Set A Key 11th NATIONAL CERTIFICATION EXAMINATION February, 2011 FOR ENERGY AUDITORS PAPER 4: Energy Performance Assessment For Equipment and Utility Systems Date: 06.02.2011 Timings: 1400-1600 HRS Duration: 2 HRS Max. Marks: 100 General instructions: o o o o o Please check that this question paper contains 12 printed pages Please check that this question paper contains 16 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: SHORT DESCRIPTIVE QUESTIONS Marks: 10 x 1 = 10 (i) Answer all Ten questions (ii) Each question carries One mark S-1 S-2 In what type of furnace, a top pressure recovery turbine is used? Ans: blast furnace In a heat exchanger, the hot fluid inlet and outlet temperatures are 110 C and 70 C. The cold fluid inlet and outlet temperatures are 30 C and 45 C. The effectiveness of heat exchanger is Ans: S-3 S-4 S-5 = 15/80 = 0.1875 Name two types of discounted cash-flow techniques used in the financial evaluation of energy saving projects Ans: 1 NPV: Net present value 2 IRR: Internal rate of return Name two areas of major thermal energy consumption in a cement plant Ans: Rotary kiln and precalciner For which fuel the difference between GCV and LCV will be higher, Coal or Natural Gas? Ans: Natural Gas 1 _______________________ Bureau of Energy Efficiency

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