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14th National Certification Exam Energy Managers & Auditors AUGUST 2013 Paper 4

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Paper 4 SET A KEY 14th NATIONAL CERTIFICATION EXAMINATION FOR ENERGY AUDITORS August, 2013 PAPER 4: Energy Performance Assessment for Equipment and Utility Systems Date: 25.8.2013 Timings: 14:00-16:00 Hrs Duration: 2 Hrs Section - I: BRIEF QUESTIONS Max. Marks: 100 Marks: 10 x 1 = 10 (i) Answer all Ten questions (ii) Each question carries One mark S-1 If EER of a 1.5 TR window airconditioner is 2.5 what will be the power input? Ans 1.5 x 3.516/2.5 = 2.11 kW S-2 What is the significance of monitoring dew point of compressed air for pneumatic instruments application? Ans To check the moisture level/dryness in instrument air S-3 For a thermal power plant, the percentage auxiliary consumption of a 500 MW unit is ____than that of a 110 MW unit. Ans Less S-4 Between one litre of liquid hydrogen and one litre of liquid gasoline which will have a higher heat content? Ans Liquid gasoline S-5 Why is the COP of a vapour absorption refrigeration system always less than one? Ans COP is given by (heat taken by evaporator/ heat given to generator). The heat given to generator of VAR is always more than heat taken away in the evaporator (refrigeration effect) S-6 Regenerators utilising waste heat are widely used in _________furnaces Ans Glass melting or Open hearth furnaces S-7 Why small bypass lines are provided in a centrifugal pump? 1 _______________________ Bureau of Energy Efficiency

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