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2003 Course Illumination Eng.

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Total No. of Questions : 12] [Total No. of Pages : 3 [3664] - 184 P 1373 B.E. (Electrical) ILLUMINATION ENGINEERING (2003 Course) (403143) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer 3 questions from Section I and 3 questions from Section II. 2) Answers to the two sections should be written in separate books. 3) Figures to the right indicate full marks. 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) b) c) State and explain the laws of illumination. [6] What is photometer ? Explain Bench photometer with a neat sketch. [6] If a lamp of 250 C.P. is placed one meter below a plane mirror which reflects 95% of the light falling on it, determine the illumination at a point three meter away from the foot of the lamp which is suspended at a height of 4 meters above ground. [6] OR Q2) a) b) c) Q3) a) b) c) Define the following terms : i) M.H.C.P. ii) M.S.C.P. iii) Luminous intensity. iv) Illumination. v) Efficucy. vi) Reflection factor. What are the various methods of controlling natural light? Enlist the properties of light. [6] Write short note on High pressure sodium vapour lamp. What is stroboscopic effect? How it can be avoided? Write short note on LASER. [6] [6] [6] [6] [6] OR P.T.O.

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