Illumination Candela is the unit of which? Frequency. Luminous intensity. Luminous flux. Wavelength. Frequency. Luminous intensity. Luminous flux. Wavelength. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which among the following lamps has the maximum burning hours? LED. Incandescent. Metal halide. Compact Fluorescent. LED. Incandescent. Metal halide. Compact Fluorescent. 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 2 6 4 5 2 6 4 ANSWER DOWNLOAD EXAMIANS APP
Illumination Luminous efficacy of a typical HPSV lamp is in between 10 - 40 lm/watt 40 - 70 lm/watt. 70 - 120 lm/watt. 120 - 200 lm/watt. 10 - 40 lm/watt 40 - 70 lm/watt. 70 - 120 lm/watt. 120 - 200 lm/watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination ___________________________ factor is defined as the ratio of the illumination when everything is clean to illumination under normal working conditions. Absorption factor. Utilization. Depreciation. Maintenance. Absorption factor. Utilization. Depreciation. Maintenance. 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 law of square inverse. both A and B. Lambert’s cosine law. None of these law of square inverse. both A and B. Lambert’s cosine law. None of these ANSWER DOWNLOAD EXAMIANS APP