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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.

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