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Chapter 3.8 - Lighting System

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Jawaharlal Nehru Technological University (JNTUH), Hyderabad

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Question bank for Energy Managers & Energy Auditors Chapter 3.8: Lighting System Part-I: Objective type questions and answers 1. GLS stands for_____. a) General Lamp source c) General Lighting Service 2. b) General Lamp Service d) General Lighting Source A device that distributes and filters the light emitted from one or more lamps is ___. a) Control gear 3. b) Lamp c) Luminaire Ignitors are used for starting____. a) FTL b) CFL c) Sodium vapor lamps 4. d) None of the above The ratio of luminous flux emitted by a lamp to the power consumed by the lamp is ___. a) Illuminace 5. d) Starter b) Lux c) Luminous Efficacy d) CRI Which of the following is the best definition of illuminance? a) Time rate of flow of light energy b) Luminous flux incident on an object per unit area c) Flux density emitted from an object without regard for direction d) Flux density emitted from an object in a given direction 6. Color rendering index is measured in the scale of____. a) 1 100 7. c) 100 1000 b) Excellent c) Average d) Very poor One lux is equal to ___. a) one lumen per meter b) one lumen per m3 9. d) None Color rendering index of Halogen lamps compared to low pressure sodium vapor lamps is ___. a) Poor 8. b) 1 100% c) one lumen per m2 d) None Color rendering index of incandescent lamp is: a) fair when compared to HPSV lamp b) poor when compared to LPSV lamp c) same when compared to HPMV lamp d) excellent when compared to fluorescent lamp 10. Which of the following light source has least life? a) Sodium vapor 11. c) Halogen d) incandescent The minimum illuminance required for non working interiors as per IS 3646 is___. a) 100 lux 12. b) Mercury Vapour b) 50 lux c) 20 lux d) 1000 lux For the same lamp output, 250 W HPMV lamp can be replaced with____. a) 150 W HPSV b) 200 W GLS c) 25 W CFL 3.8 Lighting system - revised (table format) d) 150 W HPMV 58

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