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2003 Course Illumination Eng.

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Total No. of Questions : 12] P1610 [Total No. of Pages : 3 [3764]-207 B.E. (Electrical) ILLUMINATION ENGINEERING (2003 Course) (403143) Time : 3 Hours] [Max. Marks : 100 Instructions to candidates: 1) Answer 03 questions from Section - I and 03 questions from Section - II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Use of logarithmic tables slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) a) State and explain the laws of illumination. [5] 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. [5] c) Define the following terms: i) Illumination iii) Lamp efficiency v) Luminous intensity ii) iv) vi) Reflection factor M.H.C.P. M.S.C.P. [8] OR Q2) a) Explain the properties of light. [6] b) Explain plane angle and solid angle. Also derive relation between them.[6] c) What are the various methods of controlling natural light? Q3) a) Explain the working of fluorescent tube with neat diagram. [6] [5] b) Describe the construction and working of C.F.L. [5] c) Write short note on L.E.D. s. [5] OR Q4) a) What is stroboscopic effect? How it can be avoided? b) Write short note on High pressure mercury vapour lamp. [5] [5] c) Enlist the advantages of gas discharge lamp over incandescent lamp.[5] P.T.O. Q5) a) Discuss the importants of reflectors and refractors with reference to illumination. [5] b) Explain with neat sketch the starting ballast for i) Sodium vapour ii) Mercury vapour lamp. [6] c) Explain the following with neat sketches. i) Specular reflection. ii) [6] Diffused reflection. OR Q6) a) Explain the dimming operation for i) Incandescent lamp. iii) [9] ii) Sodium vapour lamp. Metal halide lamp. b) Explain in brief the following: i) [8] Dispersive reflector. ii) Concentrating reflector. SECTION - II Q7) a) What is polar curve? Describe its types. How it is helpful for an illumination engineer. [8] b) Explain the terms: [8] i) Beam factor. ii) Waste light factor. iii) Payback Period. iv) Space height ratio. OR Q8) a) Discuss the factors of good lighting design in detail. [8] b) What is glare? Discuss the type of glare and the remedies over them.[8] Q9) a) Give the comparison between different types of light sources with [8] reference to their lumens per watt and life. b) What are the types of lighting fixtures according to installation type? [8] OR Q10) a) What is energy efficient lighting? Discuss its advantages, which are the difficulties related with energy efficient lighting. [8] b) Write short notes on: i) [3764]-207 [8] Street lighting. ii) -2- Flood lighting. Q11) a) Explain photovoltaic lighting. [4] b) Write short note on solar lighting. [4] c) Write notes on Emergency lighting scheme for i) Central system ii) [10] Stand alone system. OR Q12) a) Write short note on following: i) Cold lighting. [10] ii) O.F.C. b) Explain the components of day light factor with neat diagram. W [3764]-207 -3- [8]

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