Illumination Which among the following lamps has the maximum burning hours? LED. Metal halide. Incandescent. Compact Fluorescent. LED. Metal halide. Incandescent. Compact Fluorescent. 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 None of these Lambert’s cosine law. both A and B. law of square inverse. None of these Lambert’s cosine law. both A and B. law of square inverse. ANSWER DOWNLOAD EXAMIANS APP
Illumination ___________________________ factor is defined as the ratio of the illumination when everything is clean to illumination under normal working conditions. Depreciation. Utilization. Absorption factor. Maintenance. Depreciation. Utilization. Absorption factor. Maintenance. ANSWER DOWNLOAD EXAMIANS APP
Illumination The work of ballast in a fluorescent tube is to provide a kick start when voltage is induced. None of these. limit the flow of current. both ‘a’ and ‘b’. provide a kick start when voltage is induced. None of these. limit the flow of current. both ‘a’ and ‘b’. ANSWER DOWNLOAD EXAMIANS APP
Illumination Wave length for red colour is around 500 nm. 600 nm. 400 nm. 700 nm. 500 nm. 600 nm. 400 nm. 700 nm. 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 5 6 4 2 5 6 ANSWER DOWNLOAD EXAMIANS APP
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