Illumination Which lamp has the best Colour Rendering Index (CRI)? High pressure sodium vapour Incandescent Fluorescent LED High pressure sodium vapour Incandescent Fluorescent LED ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminous Intensity Illuminance Luminance Luminous flux Luminous Intensity Illuminance Luminance Luminous flux ANSWER DOWNLOAD EXAMIANS APP
Illumination Total flux or lumens required in any lighting scheme depends inversely on utilization factor. None of these reduction factor. reflection factor. utilization factor. None of these reduction factor. reflection factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to utilization factor. beam factor. absorption factor. waste light factor. utilization factor. beam factor. absorption factor. waste light factor. 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? 5 6 4 2 5 6 4 2 ANSWER DOWNLOAD EXAMIANS APP
Illumination The illumination of the surface varies directly with cosine of the angle between normal to surface and direction of the inclined light is given by both A and B. law of square inverse. None of these Lambert’s cosine law. both A and B. law of square inverse. None of these Lambert’s cosine law. ANSWER DOWNLOAD EXAMIANS APP
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