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2003 Course Illumination Engineering (Elective I)

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Total No. of Questions : 12] P1362 [Total No. of Pages : 3 [3864]-227 B.E. (Electrical) ILLUMINATION ENGINEERING (2003 Course) (403143) (Elective - I) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) 2) 3) Answer three questions from Section - I and three questions from section - II. Neat diagrams must be drawn wherever necessary. Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. Assume suitable data, if necessary. 4) SECTION - I Q1) a) Explain the properties of light. [6] b) Deduce the relation to find the illumination at any point on the plane surface due to light source suspended at a height h meters from the plane surface. [6] c) State and explain the laws of illumination. [6] OR Q2) a) Enlist various effects of bad lighting. Explain methods of controlling natural light. [6] b) Explain the following : [6] i) Illumination ii) Reflection factor iii) Luminous intensity iv) M.H.C.P. c) What is stroboscopic effect? How it can be avoided. Q3) a) Enlist advantages of gas discharge lamp over incandescent lamp. b) Write short note on L. E.D. s. [6] [6] [4] c) Describe the construction and working of Mercury vapour lamp with sketch. [6] OR Q4) Explain any two with sketch : i) Compact fluorescent Lamp (C.F.L.) iii) Metal Halide lamp [16] ii) LASERS iv) Sox lamp P.T.O. Q5) a) Discuss the importance of reflectors and refractors with reference to illumination. [8] b) Explain with neat sketch starting ballast for. i) Sodium vapour. ii) [8] Mercury vapour lamp. OR Q6) a) Explain the following with neat sketches i) Specular reflection. ii) [8] Diffused reflection. b) Discuss with neat sketches various types of electric light fitting used for illumination. [8] SECTION - II Q7) a) Enumerate the various factors to be consider while designing good Lighting scheme. [8] b) What is polar curve? Describe its types. How it is helpful for an illumination engineer. [8] OR Q8) a) What is glare? Discuss the type of glare and the remedies over them.[8] b) Explain the following : [8] i) Payback Period. ii) Waste light factor. iii) C.O.U. iv) Space height ratio. Q9) a) Give the comparison between different types of light sources with reference to their lumens per Watt and life. [8] b) Write short notes on: i) Street lighting. ii) [8] Flood lighting. OR Q10) a) What is energy efficient lighting? Discuss its advantages. What are the difficulties related with energy efficient lighting? [8] b) Explain the terms with suitable example. i) ii) [3864]-227 Pay back calculation. Life cycle coasting. 2 [8] Q11) a) Write notes on Emergency lighting scheme for i) Central system. ii) [6] Stand alone system. b) Explain the components of day light factor with neat diagram. [6] c) Explain Switching control of lighting. [6] OR Q12) Write short note on following: [18] a) Cold lighting. b) Photo voltaic lighting. c) O.F.C. 88888 [3864]-227 3

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