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BEE Energy Solved Question Paper 2014 : Energy

15 pages, 148 questions, 0 questions with responses, 0 total responses,

Umesh Dhumal
Mumbai University (MU), Mumbai

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Paper 3 Set A 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: Marks: 50 x 1 = 50 Answer all 50 questions Each question carries one mark Which loss is considered the most unreliable or complicated to measure in electric motor efficiency testing? a) stator Cu loss 2. b) rotor Cu loss c) stator Iron loss active power component of the network is not affected reactive power component of the network is not affected 2 I R power losses are affected in the system voltage level at the load end is affected Heat Rate of a thermal power station is the heat input in kilo Calories or kilo Joules, for generating a) one kW of electrical output c) one kWh of electrical output 5. b) active power d) none of the above Select the incorrect statement: The advantage of PF improvement by capacitor addition in an electric network is a) b) c) d) 4. b) one kVAh of electrical output d) one kVA of electrical output Improving power factor at motor terminals in a plant will a) increase active power drawn by motor c) reduce contract demand with utility 6. b) reduce system distribution losses d) increase motor design power factor For a 6 pole induction motor operating at 49.5 Hz, the percentage slip at a shaft speed of 950 RPM will be a) 4.0 % 7. d) stray loss A pure resistive load in an alternating current (AC) circuit draws a) lagging reactive power c) leading reactive power 3. Max. Marks: 150 OBJECTIVE TYPE (i) (ii) 1. Duration: 3 HRS b) 5.0 % c) 0.04 % d) none of the above A plant had installed three phase shunt capacitors to improve power factor at Motor Control Circuit (MCC). Busbar three phase Voltages at the main electrical panel of a plant were balanced but at the Motor Control Circuit (MCC),receiving three phase power from busbars, the line voltages were found to be unbalanced. The main reason for this unbalanced voltage at MCC among the following could be a) PF capacitors were operating at higher supply frequency b) PF improvement in all phase was not uniform due to blown fuse in one phase of the 3 _______________________ Bureau of Energy Efficiency 1

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