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3rd National Certification Exam Energy Managers & Auditors 2006 Paper 4

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Paper 4 Energy Auditor Set A Solutions Regn No: _________________ Name: ___________________ (To be written by the candidates) NATIONAL CERTIFICATION EXAMINATION 2006 FOR ENERGY AUDITORS PAPER 4: Energy Performance Assessment for Equipment and Utility Systems Date: 23.04.2006 Timings: 1400-1600 HRS Duration: 2 HRS Max. Marks: 100 General instructions: o o o o o o Please check that this question paper contains 4 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 Open book examination Section - I: SHORT DESCRIPTIVE QUESTIONS Marks: 10 x 1 = 10 (i) Answer all Ten questions (ii) Each question carries One mark (iii) Answer should not exceed 50 words S-1 State two causes for rise in exit flue gas temperature in a boiler. 1. Scale deposition on water side 2. Soot deposition on gas side Any other relevant cause such as reduction in excess air levels, problems with Air preheater, economizer etc. may be given mark S-2 What are the disadvantages of heating the charge above the optimum temperature in steel re-rolling furnaces? 1. Increased energy consumption rates S-3 2. Increase in scale losses 3. High rejection State the impact of fouling factor on the overall heat transfer coefficient. They are inversely proportional. Increase in fouling factor will result in decreased overall heat transfer coefficient. _________________________ Bureau of Energy Efficiency 1

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