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BEE Energy Sample / Model Paper 2014 : Energy 3

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Paper 3 Set B 15th NATIONAL CERTIFICATION EXAMINATION FOR ENERGY MANAGERS & ENERGY AUDITORS August, 2014 PAPER 3: Energy Efficiency in Electrical Utilities Date: 24.04.2014 Timings: 0930-1230 HRS Section I: Which loss is considered the most unreliable or complicated to measure in electric motor efficiency testing? b) rotor Cu loss d) stray loss b) best efficiency point d) none of the above In case of increased suction lift from open wells, the pump delivered flow rate a) increases 4. c) stator Iron loss The intersection point of the centrifugal pump characteristic curve and the design system curve is the a) pump efficiency point c) system efficiency point 3. Marks: 50 x 1 = 50 Answer all 50 questions Each question carries one mark a) stator Cu loss 2. Max. Marks: 150 OBJECTIVE TYPE (i) (ii) 1. Duration: 3 HRS b) decreases c) remains same d) none of the above In pumping systems where static head is a high proportion of the total, the appropriate solution is a) install two or more pumps to operate in parallel b) install two or more pumps to operate in series c) install two or more pumps to operate in independent operation d) none of the above 5. A Plant wants to replace the existing 100 TR water cooled vapour compression refrigeration system with a waste heat driven vapour absorption chiller. The capacity of the existing cooling tower a) needs no change c) is to be raised to 1.2 times 6. Shaft power of the motor driving a pump is 30 kW. The motor efficiency is 0.92 and pump efficiency is 0.5. The power drawn by the motor will be a) 65.2 kW 7. b) 15 kW c) 30 kW d) 32.6 kW 3 o If water is flowing through a cooling tower at 120 m /h with 5 C range, the load on cooling o tower at an ambient wet bulb ambient temperature of 33 C is a) 198.4 TR 8. b) is to be doubled d) none of the above b) 357 TR c) 158 TR d) none of the above In a plant, the loading on a transformer was 1000 kVA with the power factor of 0.88. The plant improved the power factor to 0.99 by adding capacitors on the load side. The release in transformer loading( kVA) will be _______________________ Bureau of Energy Efficiency 1

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