Illumination The solid angle subtended by an area of 2400 cm2 on the surface of a sphere of diameter 1.2 m is 2 / 3. 2 / 5. 3 / 2. 1 / 3. 2 / 3. 2 / 5. 3 / 2. 1 / 3. ANSWER DOWNLOAD EXAMIANS APP
Illumination The work of ballast in a fluorescent tube is to limit the flow of current. provide a kick start when voltage is induced. both ‘a’ and ‘b’. None of these. limit the flow of current. provide a kick start when voltage is induced. both ‘a’ and ‘b’. None of these. ANSWER DOWNLOAD EXAMIANS APP
Illumination Total flux or lumens required in any lighting scheme depends inversely on None of these reduction factor. reflection factor. utilization factor. None of these reduction factor. reflection factor. utilization factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp has a negative Colour Rendering Index (CRI)? Fluorescent Low pressure sodium vapour LED High pressure sodium vapour Fluorescent Low pressure sodium vapour LED High pressure sodium vapour ANSWER DOWNLOAD EXAMIANS APP
Illumination What will be the number of lamps, each having 300 lumens, required to obtain an average illuminance of 50 lux on a 4m × 3m rectangular room? 4 2 6 5 4 2 6 5 ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminous Intensity Luminance Luminous flux Illuminance Luminous Intensity Luminance Luminous flux Illuminance ANSWER DOWNLOAD EXAMIANS APP
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