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20th National Certification Exam Energy Managers & Auditors SEPTEMBER 2019 Paper 3

16 pages, 51 questions, 1 questions with responses, 1 total responses,

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Jawaharlal Nehru Technological University (JNTUH), Hyderabad

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Paper 3 Code : Pink 20th NATIONAL CERTIFICATION EXAMINATION FOR ENERGY MANAGERS & ENERGY AUDITORS September, 2019 PAPER 3: ENERGY EFFICIENCY IN ELECTRICAL UTILITIES Section I: OBJECTIVE TYPE Marks: 50 x 1 = 50 i) Answer all 50 questions ii) Each question carries one mark iii) Please hatch the appropriate oval in the OMR answer sheet with HB pencil only, as per instructions 1. In a pumping system, if then___________________. the temperature of the liquid handled increases, a) NPSHa increases b) NPSHa decreases c) NPSHa remains constant d) NPSHa and NPSHr are independent of temperature 2. Which of the following component has maximum effect on cooling tower performance? a) Fill media 3. b) drift c) louvers d) casing In a vapour compression refrigeration system, the quantum of energy transferred at condenser is more than the energy transferred at ___________. a) Compressor b) Expansion Valve c) Evaporator d) All of the above 4. Demand side Management helps ____________ a) to reduce the energy losses c) to promote energy efficiency among users. 5. b) to reduce system peak demand d) All of the above Which one of the following is true to estimate the range of cooling tower? a) Range = Cooling water inlet temperature Wet bulb temperature b) Range = Cooling water outlet temperature Wet bulb temperature c) Range = Wet Bulb Temperature Cooling Water Inlet Temperature d) None of the above 6. Modest flow variation between 80% to 100%, in a centrifugal fan is achieved more efficiently with ___________________. a) Inlet damper b) Outlet damper c) Inlet guide vanes d) Impeller Change 7. ____________is used as refrigerant both in vapour compression and vapour absorption systems a) Lithium Bromide _______________________ Bureau of Energy Efficiency b) Water c) HFC 134A d) Ammonia 1

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